Michael Moore Essay Example for Free

Michael Moore Essay Michael Moore has provided radical political alternative to mainstream perspective by making documentaries, writing books and commenting on the political issues. He is the person who has criticized on globalization, large co-operations and assault weapon ownerships. He has done a controversial movie with President George W. Bush named Fahrenheit 9/11. That was the award-winning and controversial film of 2004. This movie contained the distortions and untruths which had endorsed President Bush for re-election. That was the first time a film has this kind of impact. Background Michael Moore born on April 23, 1954, is the famous American film maker, author and liberal political commentator. He was born as Irish Catholic. He had done schooling from parochial St. Johns Elementary School for primary school and originally intended to join the seminary. He then attended Davison High School where he had done drama and debate. In 1972, he completed graduation and at the age of 18, he was elected to the Davison School board. As he dropped out from the University of Michigan-Fint, he worked with the student newspaper The Michigan Times and worked with the General motors. Then he got the alternative weekly magazine The Flint Voice nowadays called as The Michigan Voice, at the age of 22. In 1986, he became the editor of Mother Jones. After 4 months, he was fired from the Mother Jones because he had refused to print the article by Paul Berman, which was against the social political party of Nicaragua, named Sandinista. He was once sued for wrongful dismissal and the case got settled out of court for $58,000, providing him with the seed money for his first film â€Å"Roger me†. In 1990, he got married to a producer Kathleen Glynn and he started living with his stepdaughter Natalie in the Traverse City, Michigan. He was Catholic, but he was disagreed with the church teachings on abortion and gay marriage. He also started the Traverse City Film Festival in Traverse City, Michigan in 2005. Also Time magazine named him one of the world’s 100 influencing people. He had made many documentary movies which criticize the globalization, large co-operations and assault weapon ownership. He had produced and directed movies like Roger me, Fahrenheit 9/11, Canadian Bacon etc. These were the documentary movies which criticize the society on the issues like political, globalization etc. Capitalism-A Love Story was the movie which shown the financial crisis of 2007-2010 and the US transition between the administration of incoming Obama and outgoing Bush. During a press conference he said â€Å"Democracy is not a spectator sport, its a participatory event. If we dont participate in it, it ceases to be a democracy. So Obama will rise or fall based not so much on what he does but on what we do to support him† Reuters Sept 06, 2009. He had done acts in the movies like Lucky Numbers, the Fever and Canadian Bacon. He had played many roles like an Anti-Canadian activist and journalist. He had also hosted the BBC television series TV Nation and the series was aired on BBC2 in UK 1994-1995. It was also aired in US on NBC in 1994 for 9 episodes and in Fox for 8 episodes. In 1999-2000, The Awful Truth was aired on Channel 4 (U. K) and Bravo (U.  S), which satirized the actions of big co-operations and politicians. In 1999, the show which was similar to the â€Å"The Awful Truth† but also incorporated phone-ins and a live stunt each week was aired through U. K. ’s Channel 4. The name of the show was Michael Moore live. Also in 1999 he had won â€Å"Hugh M. Hefner First Amendment Award† in Arts and Entertainment for â€Å"The Awful Truth† where he was also described as the muckraker, author and documentary filmmaker. He had also directed various music videos like Rage against Machine, Sleep Now in the Fire, Boom and All the way to Reno. He had made appearance in the documentary movies like The Drugging of Our Children (2005), Grand Funk Railroads, Blood in the Face (1991), The Yes Man (2003 , The Corporation (2004), Martial Law 9/11:Rise of the Police State (2005), The Divided State (2005), I’m Going to Tell You a Secret (2006) and Shooting Michael Moore. These movies were the documentaries on different issues of the society. The movie â€Å"The Drugging of Our Children† was the movie based on the over-prescription of psychiatric meditation to children and teenagers. The movie â€Å"Blood in the Face† was the documentary about supremacy groups (Neo-Nazi). In 2003, the movie The Yes Man was the documentary in which two men posed like World Trade Organizations and he appeared during the segment which was concerned about the working conditions of Mexico and Latin America. He had said The problem is the profit motive: for corporations, theres no such thing as enough’† during the interview for his movie â€Å"The Corporation†. Then he was appeared in the movie Martial Law 9/11: Rise of the Police State, which was the criticism to his own movie Fahrenheit 9/11. He was also featured in the movie The Divided State which followed the levels of controversies surrounding his visit to U. S. before elections in 2004. Then he appeared in I’m Going to Tell You a Secret which chronicles Madonna during her 2004 Re-invention world tour. He had also written the famous books like â€Å"Downsize this! † which was based on corporate crime and politics in U. S. , â€Å"Stupid White Men† which was the critics on American’s domestic and foreign policies and â€Å"Dude, Wheres My Country? † which was based on Bush Family’s relationship with Saudi royalty, Bin Laden Family and the energy industry and a call-to-action for liberals. Discussion Michael Moore has criticized the whole system of America in many ways like through documentary movie, books, TV shows, press conferences and many other ways. He is the person who has criticized President George W. Bush on the 9/11 attacks. He had changed the face of elections in September 2008 as he released the movie on internet â€Å"Slacker Uprising†. In all his movies, books written, TV shows, music audios etc, he has criticized globalization, large corporations and assault weapon ownership, the Iraq War, U.  S. President George W. Bush and the American health care system in his written and cinematic works. I am trying to reach across the great divide that exists in our country right now, he said. Certainly we could find some common ground on issues like health care, because illness knows no political stripe. (Flasher, 2007) His book â€Å"Downsize This! Random Threats from an Unarmed American† was a critical review on the corporations ignoring the safety and well being of their community and workers over their stockholders. He had shown the true faces of the society which he wants to change. Bowling for Columbine Like most of the Moore’s work this movie was based on the real life incidence of 1999 the Columbine High School massacre. This massacre claimed the life of twelve students, one teacher, injuring more than twenty other people and ended up in suicide of the two students committing the crime. This was regarded as one of the deadliest school incidences in America and raised questions over the distribution and control of guns and arms. The movie revolved around the weapon control issues. This movie was critically acclaimed, received commercial success as well as criticized for misrepresentation of facts. However people liked it for various reasons. The movie goes on probing various aspects of the violent records of USA across the world. Ordonez-Jasis, and Jasis () listed various issues discussed between Moore and Evan McCallum (the spokesperson for Lockheed Martin, the largest weapons-builder in the nation on the violent history of American involvement in various international activities such as, Mossadegh government and the imposition of the Shah (1953), our involvement and war in Vietnam (1963 to 1975), the overthrow and assassination of the democratically elected president of Chile, Salvador Allende (1973) to the funding, training and support of death-squad governments in El Salvador (1977 to 1991), the Contra war in Nicaragua (1981 to 1990), our involvement and funding of both sides of the Iraq-Iran war (1980 t o 1988), the bloody invasion of Panama (1989), our involvement in the invasion of Kuwait and its aftermath, the Gulf War against Iraq (1990 to 1991), the Yugoslavia-Kosovo war (1999), and, finally, our initial support for and later destruction of the Taliban government in Afghanistan (2001 to 2002). The disturbing actual footage of the violence and death caused by U. S. foreign policy are portrayed as acts of international violence. (Ordonez-Jasis and Jasis)† Moore had described the Columbine High School massacre as microcosm of what happens throughout the world. This was considered as cruel as well as unfair comparative statement as the level of massacre, the objectives and implications have been different. However, it could have been controlled with strict gun control laws. The unfortunate deaths of students and psychological trauma of injured and related people has been compared to the thousands of those who faced the direct and indirect involvement of US in violent activities in their country or region. This comparative analysis shocked America as well as internationally questioned the role of America in various issues. Fahrenheit 9/11  This was again a controversial documentary movie targeting the President over the decision to attack Iraq irrespective of the fact that major world leading organization and parties were against it. The controversies were over various factors like utilization of oil resources to the personal reasons President George Bush may have. The movie was acclaimed in various film festivals from Cannes to Academy awards. This movie is presented as an examination of the role of America, particularly the role of The President after the Twin Tower, September 11 2001 attacks. This film like his earlier works has been in controversies for the distortion of truth. There was list of facts and figures published along with the movie release related to the points raised in the movie. This movie was also politically motivated as 2004 election was due when the movie released and it was said to have impact on the election. â€Å"Moores Fahrenheit 9/11 surpassed that success on its opening week- end. Released in the summer before the 2004 U. S. presidential election, the anti-Bush administration film became a powerful rallying point for both Bush detractors and Bush supporters. That it arrived in American theaters with the imprimatur of the Cannes Film Festivals Palme DOr award only spiked the controversy. No film has ever played such a prominent role in U. S. lectoral politics. (McEnteer 2006, 79) The movie and Moore got international recognition with this movie. The movie presented Bush and his family’s, presented Bush as a ‘corrupted clown, serial deceiver and rendering his critics apopliect’ (McEnteer, 2006) Capitalism (Capitalism, a love story) This movie was based on the corporate malfeasance. This means the privatization and led implications on the life of individuals across the world. There have been number of works from across the range of journalists, film makers and others like Noam Chomsky, Howard Zinn, Michael Moore, and Vandana Shiva who questioned role of various power bodies of our society. Chomsky on one hand questioned the role of media in misrepresentation of Islam, whereas Moore has attacked to various power bodies across the world. The movie was well created that it succeeded to keep the attention of viewers from start to the end. The movie included the 1950s corporate propaganda films. There have been some scenes of the movie that was been appreciated like in one of the scenes the Shell Oil CEO Mark Moody-Stuart is shown to have tea on his front lawn with the same people against him, referred him murderer on the giant banner and are the Earth First! Activists. Capitalism was attack on the role of large corporations and their profitability concerns that is impacting the environment, society and world as a whole. Conclusion No matter how controversial Moore’s work has been so far. His presentations have given people an opportunity to think something that can be a hidden truth. The questioned raised over the aspects like individual ethics and collective imperatives, role of media, role of administrative agencies and the ability to present something that can impact power centers have helped in manufacturing different consents in the society altogether. Moore works have held the power centers responsible and accountable for their actions and justifications of the actions. American political spectrum has been very much influenced by Moore as a personality and his work that attacked various political and power spectrums.

Emotion Recognition System for Affective Text

Emotion Recognition System for Affective Text K.Thendral, Dr.S.Chitrakala, S.P.Surendernath ABSTRACT: Mining social emotions deals with a new aspect for categorizing the document based on the emotions such as happy, sad, sympathy, etc., theyhelp online users to select related documents based on their emotional preferences. Aiming to find the connections between social emotions and affect terms and thus predict the social feeling from text content mechanically. Joint emotion-topic model by augmenting Latent Dirichlet Allocation with an additional layer for emotion modelling initially generates a group of latent topics from emotions, followed by generating affect terms from every topic. The techniques involved in this are emotion term model, topic model and emotion topic model. The emotion-topic model utilizes the complementary advantages of both emotion term model and topic model,and is not only effective in extracting the meaningful latent topics, but also improves the performance of social emotion prediction. Keywords – Affective Text,Emotion-topic model, Latent Dirichilet Allocation. 1. INTRODUCTION: An emotion is a Meta communicative pictorial representation of a facial expression which in the absence of body language and probably draw to serve a receiver’s attention to the tenor or temper of a sender’s nominal verbal communication, changing and improving its interpretation. It expresses-usually by means of punctuation marks – a person’s feelings or mood and can include numbers and letters. The interrelation of text and emotions has been a captivating topic for centuries. What makes people feel what they read? How is the writer’s emotion conveyed in a text? How can we write to communicate an emotional message more clearly? A number of researchers have attempted to obtain answers to these questions for a long time and there is an enormous amount of literature on techniques and devices for emotion detection. (Bloom, Garg, Argamon, 2007;) Two attempts to measure emotions are based on two different models: dimensional and categorical. In the categorical model emotions are labelled, say that a person is â€Å"happy† or â€Å"sad†and people get a sense of what others mean. In the dimensional model the representation is using multidimensional scaling (e.g. â€Å"pleasant-unpleasant†, â€Å"excitement†, and â€Å"yielding-resisting†). In the affective computing domain, supervised learning techniques are preferred due to strong performance. However, a challenge to using supervised techniques is the need for corpora with text that has been annotated with emotion labels. These are time consuming and expensive to produce. Unsupervised techniques do not have these requirements but are often less precise. 2. RELATED WORK Many methods have been proposed to mine emotions from the text and social networks. Affective text mining deals with mining emotions from affective words. SemEval introduced a task named â€Å"affective text† in 2007 [2], aiming to annotate short headline texts with a predefined list of emotions and/or polarity orientation (positive/negative).There is a large body of previous work on mining affective content from text documents, product reputation mining [10], customer opinionextraction/summarization[11], [12], and sentiment classification [13]. However, none of these studies explores the connection between social emotions and affective terms. An online system Mood Views has also been developed for tracking and searching emotion annotated blog posts [12], [13], [14], [15]. The posts are published with an indicator of the â€Å"current mood† of the blogger, at the time of posting the blog. Mood-Views is a platform for collecting, analyzing, and displaying aggregate moods in the blog space. Launched in mid-2005, Mood Views continuously collects these emotion indications, as well as the blog posts themselves, and provides a number of services. Despite the success of previous work on emotion prediction, existing approaches usually model documents under the â€Å"bag-of-word† assumption, so that the relationship across words is not taken into account. This also prevents us from further understanding the connections between emotions and contents in the topic level, because it is arguable that emotions should be linked to specificdocument topics. D.M. Blei, A.Y. Ng, and M.I. Jordan [8] proposed Latent Dirichlet Allocation generative probabilistic model for collections of discrete data such as text corpora. LDA is a three-level hierarchical Bayesian model, in which each item of a collection is modelled as a finite mixture over an underlying set of topics. Each topic is, in turn, modelled as an infinite mixture over an underlying set of topic probabilities. In the context of text modelling, the topic probabilities provide an explicit representation of a document. Joint latent topic model for text and citations [8].The Pairwise-Link-LDA model combines the ideas of LDA [4] and Mixed Membership Block Stochastic Models [1] and allows modelling arbitrary link structure. However, the model is computationally expensive, since it involves modelling the presence or absence of a citation (link) between every pair of documents. The second model solves this problem by assuming that the link structure is a bipartite graph. As the name indicates, Link-PLSA-LDA model combines the LDA and PLSA models into a single graphical model. I. Titov and R. McDonald [8] proposed statistical model which is able to discover corresponding topics in text and extract textual evidence from reviews supporting each of these aspect ratings – a fundamental problem in aspect-based sentiment summarization. Achieve high accuracy, without any labelled data except the user opinion ratings. Rosen-Zvi et al. [3] merged author factors with document generation to jointly estimate document contents as well as author interests. From the perspective of model generation, their author variable shares some similarity with the emotion variable in this model. The key difference lies in different sampling distributions. Their author variable is chosen uniformly from a set of authors while emotion variable is sampled from multinomial distributions by the emotions contributed by web users. 3. PROPOSED SYSTEM An online text collection D is associated with a vocabulary W,and a set of predefined emotions E. Comparing the extracted and optimized content with the already founded latent topics that relating to the extracted and optimized content with the already founded latent topics that relating to each emotion. Based on the result we are finding which emotion the particular content represents. Based on the user emotion requests the categorized content will display. Objective is to accurately model the connections between words and emotions, and improve the performance of its related tasks such as emotion prediction. Both the emotion –term model and emotion-topic model can be applied to emotion prediction by estimating their probability to evaluate their prediction performance.In this paper, proposing a joint emotion-topic model for social affective text mining, which introduces an additional layer of emotion modelling into Latent Dirichlet Allocation (LDA). Proposed model follows a three-step generation process for affective terms, which first generates an emotion from a document-specific emotional distribution, then generates a latent topic from a Multinomial distribution conditioned on emotions, and finally generates document terms from another Multinomial distribution based on latent topics. Because its exact inference is intractable, developing an approximate inference method based on Gibbs sampling. For social emotionprediction, the proposed model outperforms the emotion term model, term-based SVM model, and topic-based SVM model significantly. 3.1 EMOTION TERM MODEL Emotion-term model,follows the Naive Bayes method by assuming words are independently generated from social emotion labels. It generates each word wi of document d in two sampling steps, i.e., sample an emotion ei according to the emotion frequency count d, and sample a word wi given the emotion under the conditional probability P (w|e). The model parameters can be learned by maximum likelihood estimation. It can be formally derived based on the word and emotion frequency counts. To use the emotion-term models for predicting emotion on a new document d, apply the Bayes theorem (1)under the term independence assumption. P (e|d) = P(d|e) ÃŽ ± P (d | e) P(e)(1) P(d) where P(e) is the a priori probability of emotion e. It can again be calculated by maximum likelihood estimation (MLE) from the emotion distribution of the entire collection. 3.2 TOPIC MODEL Many topic models have been proposed and well-studied in previous work, of which, LDA [8] is one of the most successful models. LDA addresses the over fitting problem faced by other models like pLSI by introducing a Dirichlet prior over topics and words. Although LDA can only discover the topics from document and cannot bridge the connection between social emotion and affective text, for the ease of understanding in the following description, a simple review of LDA is here. In the first study of LDA, proposed a convexity-based variation inference method for inference and parameter estimation under LDA. P(zi=j|z-i,w)ÃŽ ± + ÃŽ ² + ÃŽ ± (2) + | W | ÃŽ ² +|Z| ÃŽ ± where n-i means the count that does not include the current assignment of zi, is the number of times word w has been assigned to topic j, and is the number of times a word from document d has been assigned to topic j. Fig.1. Proposed System Architecture 3.3 EMOTION TOPIC MODEL Emotion-term model simply treats terms individually and cannot discover the contextual information within the document. While topic model utilizes the contextual information within the documents, it fails to utilize the emotional distribution to guide the topic generation. In this paper, proposing a new approach called emotion topic model. The importance of this latent topic generation in the affective text mining is very much Likewise, different latent topics are discovered based on the emotions involved in it. Those latent topics should be collected together as a whole so that whenever needed it can be referred. After collecting each and every topic, it should be categorized on the basis of the different emotions such as love, happy, sad, sympathy, worry etc..They are used to select the document based on the preference assigned to the emotions. Relate the social emotions with an affective term that predict the emotions automatically from the text. After collecting and categorizing each latent topic based on different emotions, are stored to check with the extracted content. Then the topics are compared with the extracted content as a result of which it will generate topics and get processed. For each word the posterior distribution on emotion â€Å"Æ Ã¢â‚¬  and topic â€Å"z† based on the following conditional probabilities which can be derived by the following equations (3). P(Æ i=e|ÃŽ ³, Æ -i, z, w;ÃŽ ±,ÃŽ ²) ÃŽ ± ÃŽ ±+* ÃŽ ³ di,e(3) |z|ÃŽ ±+ÃŽ ³di,eà ªÃ… ¾Ã…’ Where e and z are the candidate emotion and topic for sampling.di D indicates the document from which current word wi is sampled.is the number of times topic z has been assigned to emotion e. 4. EXPERIMENTAL RESULTS This section presents the experimental results on both joint emotion topic modelling and its application to emotion prediction .News articles were collected from the news portal and the input data’s are pre-processed to remove stem and stop words and perform tagging to extract the explicit words.Word frequency, document frequency were calculated. Emotion term model performs calculating word frequency and the emotion frequency count and the corresponding terms and emotion were obtained. (a) Topic modelling which generates set of topics for the input documentConsists of the word and associated topic. (b) Emotion topic model bridges the connection between words and the emotion with the associated topic. (c) The standard parameters which are used for experimental evaluation are precision,recall and accuracy.Precision is defined as number of retrieved relevant documents divided by total number of retrieved documents and the recall is the number of retrieved relevant document divided by total number of relevant documents in the database. Accuracy can be calculated as relevant document retrieved in top T returns divided by T. Precision = Number of retrieved relevant document Total number of retrieved documents Recall = Number of retrieved relevant document Total number of relevant documents Accuracy = Relevant documents retrieved in top T T (d) Emotion Distribution (e)Precision, recall and f-score Fig.2.(a)Emotion term model (b) Topic model (c) Emotion topic model(d) Emotion distribution(e)Precision, recall 5.CONCLUSION This paper, presents and analyse a new problem called social affective text mining, which aims to discover and model the connections between online documents and user-generated social emotions. To this end, proposing a new joint emotion-topic model by augmenting Latent Dirichlet Allocation with an intermediate layer for emotion modelling. Rather than emotion term model that treats each term in the document individually and LDA topic model that only utilizes the text co-occurrence information, emotion-topic model allows associating the terms and emotions via topics which is more flexible and has better modelling capability. REFERENCES [1] R. Cai, C. Zhang, C. Wang, L. Zhang,  Music Recommendation Using Emotional  Allocation,†Proc. 15th Int’l Conf. Multimedia, pp. 553-556, 2007. [2] C. Strapparava and R. Mihalcea,  Ã¢â‚¬Å"Semeval-2007 Task 14: Affective Text,†Ã‚  Proc. Fourth Int†¢fl Workshop Semantic  Evaluations (SemEval‘07), pp. 70-74, 2007. [3] C. Yang, K.H.-Y. Lin, and H.-H. Chen,  Ã¢â‚¬Å"Emotion Classification Using Web Blog  Corpora,† Proc. IEEE/WIC/ACM Int†¢fl  Conf. Web Intelligence (WI ‘07), pp. 275-  278, 2007. [4] C.O. Alm, D. Roth, and R. Sproat,  Ã¢â‚¬Å"Emotions from Text: Machine Learning for Text-Based Emotion Prediction,† Proc. Joint Conf. Human Language Technology and Empirical Methods in Natural Language Processing (HLT/EMNLP ‘05), pp. 579- 586, 2005. [5] C. Strapparava and R. Mihalcea,  Ã¢â‚¬Å"Learning to Identify Emotions in Text,†Ã‚  Proc. 23rd Ann. ACM Symp. Applied  Computing (SAC ‘08), pp. 1556-1560,2008. [6] A. Esuli and F. Sebas,â€Å"Sentiwordnet: A Pub-Licly AvailableLexical Resource for Opinion Mining,Proc. Fifth Int’l Conf. Language Resourcesand Evaluation (LREC ‘06), 2006. [7] C. Strapparava and A. Valitutti,â€Å"Wordnet-Affect: An Affective Extension of Wordnet,†Proc. Fourth Int’l Conf. Language Resources and Evaluation  (LREC ‘04),2004.   [8] D.M. Blei, A.Y. Ng, and M.I. Jordan,  Ã¢â‚¬Å"Latent Dirichlet Allocation,† J. Machine  Learning Research, vol. 3, pp. 993-1022,  2003. [9] C.P. Robert and G. Casella, Monte Carlo Statistical Methods, seconded. Springer Publisher 2005. [10] Mihalcea, R. and Strapparava. C. (2006). â€Å"Learning to laugh (automatically)†: Computationalmodels for humour recognition. Computational Intelligence, 22(2), pages 126–142. [11] A.-M. Popescu and O. Etzioni, â€Å"Extracting Product Features and Opinions from Reviews,† Proc. Joint Conf. Human Language Technology and Empirical Methods in Natural Language Processing (HLT/EMNLP ’05), pp. 339-346, 2005. [12] B. Pang, L. Lee, and S.Vaithyanathan, â€Å"Thumbs Up? Sentiment Classification Using Machine Learning Techniques,† Proc. Conf. Empirical Methods in Natural Language Processing (EMNLP ’02), pp. 79-96, 2002. [13] M. Rosen-Zvi, T. Griffiths, M. Steyvers, and P. Smyth, â€Å"The Author-Topic Model for Authors and Documents,† Proc. 20th Conf. Uncertainty in Artificial Intelligence (UAI ’04), pp. 487-494, 2004. [14] Alm, C.O., Roth, D. and Sproat, R. (2005). â€Å"Emotions from text: machine learning for textbased emotion prediction†. In Proceedings of the Joint Conference on Human LanguageTechnology / Empirical Methods in Natural Language Processing. [15] Mihalcea, R. and Liu, H. (2006). â€Å"A corpus-based approach to finding happiness†, in the AAAI Spring Symposium on Computational Approaches to Weblogs, Stanford, California, USA. [16] M. Hu and B. Liu, â€Å"Mining and Summarizing Customer Reviews,† Proc. 10th ACM SDIGKD Int’l Conf. Knowledge Discovery and Data Mining (SIGKDD ’04), pp. 168-177, 2004. [17] G. Mishne, K. Balog, M. de Rijke, and B. Ernsting, â€Å"Moodviews: Tracking and Searching Mood-Annotated Blog Posts,† Proc. Int’l AAAI Conf. Weblogs and Social Media (ICWSM ’07), 2007. [18] K. Balog and M. de Rijke, â€Å"How to Overcome Tiredness: Estimating Topic-Mood Associations,† Proc. Int’l AAAI Conf.Weblogs and Social Media (ICWSM ’07), 2007. [19] K. Balog, G. Mishne, and M. Rijke, â€Å"Why Are They Excited? Identifying and Explaining Spikes in Blog Mood Levels,† Proc. Ninth Conf. European Chapter of the Assoc. for Computational Linguistics (EACL ’06), 2006. [20] Mihalcea, R. and Liu, H. (2006). â€Å"A corpus-based approach to finding happiness†, in the AAAI Spring Symposium on Computational Approaches to Weblogs, Stanford, California, USA. [21] G. Mishne and M. de Rijke, â€Å"Capturing Global Mood Levels Using Blog Posts,† Proc. AAAI Spring Symp. Computational Approaches to Analysing Weblogs (AAAI-CAAW ’06), 2006. [22] I. Titov and R. McDonald, â€Å"A Joint Model of Text and Aspect Ratings for Sentiment Summarization,† Proc. 46th Ann. Meeting of the Assoc. for Computational Linguistics (ACL ’08), June 2008. [23] Mihalcea, R., Corley, C., Strapparava, C. (2006). Corpus-based and Knowledge-basedâ€Å"Measures of Text Semantic Similarity†. Paper presented at the Proceedings of theNational Conference on Artificial Intelligence. [24] Lichtenstein, A., Oehme, A., Kupschick, S., Jà ¼rgensohn, T. (2008). Comparing TwoEmotion Models for Deriving Affective States from Physiological Data. Affectand Emotion in Human Computer Interaction, 35-50. [25] H. Liu, T. Selker, and H. Lieberman, â€Å"Visualizing the AffectiveStructure of a Text Document,† Proc. CHI ’03 Extended Abstracts on Human Factors in Computing Systems Conf., 2003. [22] T. Hofmann, â€Å"Probabilistic Latent Semantic Indexing,† Proc. 22ndAnn. Int’l ACM SIGIR Conf. Research and Development in Information  Retrieval (SIGIR ’99), 1999. [23] M. Rosen-Zvi, T. Griffiths, M. Steyvers, and P. Smyth, â€Å"The Author-Topic Model for Authors and Documents,† Proc. 20thConf. Uncertainty in Artificial Intelligence (UAI ’04), pp. 487-494,  2004. [25] X. Wang and A. McCallum, â€Å"Topic over Time: A Non-Markov Continuous-Time Model of Topical Trends,† Proc. 12th ACM SIGKDD Int’l Conf. Knowledge Discovery and Data Mining (SIGKDD ’06), pp. 424-433, 2006. Department of Computer Science and Engineering, K.S.R. College of Engineering (Autonomous), Tiruchengode-637215

Desmear and electroless plating

Desmear and electroless plating Introduction Printed circuit board is used in the electronic manufacturing for mechanical and electrical support. It is electronically connects the electric components using conductive traces, carved from copper covered onto a non-conductive material. Printed circuit board are usually include copper and copper mixture materials that are coated to provide good mechanical and good conductivity with other devices in the assembly. Printed circuits board are used in all electronic equipments such as computer and mobile phones and TV and communications equipment and satellite as well as in the control of gadgets in the factories, companies and other uses of the innumerable à Ã‚ t thà Ã‚ µ mà Ã‚ ¾mà Ã‚ µnt thà Ã‚ µrà Ã‚ µ iц¢  ° ц¢trà Ã‚ ¾ng inÑ rà Ã‚ µÃ‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ in thà Ã‚ µ dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢irà Ã‚ µ fà Ã‚ ¾r jà Ã‚ ¾int bà Ã‚ µnding  °nd jà Ã‚ ¾int bà Ã‚ µnding-rigid and light à Ã‚  Ãƒ Ã‚ ¡Bц¢ duà Ã‚ µ tà Ã‚ ¾ Ñ Ãƒ Ã‚ µrt °in m °rkà Ã‚ µt ц¢Ãƒ Ã‚ µÃƒâ€˜Ã‚ tà Ã‚ ¾rц¢. Thà Ã‚ µ inÑ rà Ã‚ µÃ‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µd tà Ã‚ µÃƒâ€˜Ã‚ hnà Ã‚ ¾là Ã‚ ¾giÑ Ã‚ °l dà Ã‚ µm °ndц¢ frà Ã‚ ¾m thà Ã‚ µ l °tà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢t h °ndhà Ã‚ µld dà Ã‚ µviÑ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾nt °ining Digital Ñ Ã‚ °mà Ã‚ µr °Ãƒâ€˜Ã¢â‚¬ ¢  °nd nà Ã‚ µw high TV rà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ ¾lutià Ã‚ ¾n ц¢Ãƒâ€˜Ã‚ rà Ã‚ µÃƒ Ã‚ µnц¢  °Ãƒâ€˜Ã¢â‚¬ ¢ wà Ã‚ µll  °Ãƒâ€˜Ã¢â‚¬ ¢ thà Ã‚ µ nà Ã‚ µwà Ã‚ µr mà Ã‚ ¾bilà Ã‚ µ Ñâ‚ ¬hà   ¾nà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ mà Ã‚ µÃ‚ °nц¢ th °t thà Ã‚ µrà Ã‚ µ iц¢  ° ц¢urgà Ã‚ µ in thà Ã‚ µ rà Ã‚ µquirà Ã‚ µmà Ã‚ µnt fà Ã‚ ¾r jà Ã‚ ¾int bà Ã‚ µnding-rigid Ñâ‚ ¬Ã‚ °nà Ã‚ µlц¢  °nd multi-jà Ã‚ ¾int bà Ã‚ µnding Ñâ‚ ¬Ã‚ °nà Ã‚ µlц¢. Thà Ã‚ µ nà Ã‚ µÃƒ Ã‚ µd tà Ã‚ ¾ m °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñâ‚ ¬rà Ã‚ ¾duÑ Ãƒ Ã‚ µ thà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ Ñâ‚ ¬Ã‚ °nà Ã‚ µl tyÑâ‚ ¬Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢  °nd tà Ã‚ ¾ rà Ã‚ µduÑ Ãƒ Ã‚ µ thà Ã‚ µ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢t à Ã‚ ¾f m °nuf °Ãƒâ€˜Ã‚ turà Ã‚ µ,  °Ãƒâ€˜Ã¢â‚¬ ¢  °lw °yц¢ h °Ãƒâ€˜Ã¢â‚¬ ¢ drivà Ã‚ µn thà Ã‚ µ dà Ã‚ µvà Ã‚ µlà Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬mà Ã‚ µnt à Ã‚ ¾f nà Ã‚ µwà Ã‚ µr mà Ã‚ µthà Ã‚ ¾dц¢ à Ã‚ ¾f Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ing. (à Ã¢â‚¬ ¦Ãƒâ€˜Ã‚ hlà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ingà   µr, 2002, 82) Tà Ã‚ µÃƒâ€˜Ã‚ hniÑ Ã‚ °lly thà Ã‚ µ m °tà Ã‚ µri °lц¢ invà Ã‚ ¾lvà Ã‚ µd in jà Ã‚ ¾int bà Ã‚ µnding / jà Ã‚ ¾int bà Ã‚ µnding-rigid PCB bà Ã‚ ¾Ã‚ °rd m °nuf °Ãƒâ€˜Ã‚ turing gà Ã‚ µnà Ã‚ µr °tà Ã‚ µ  ° l °rgà Ã‚ µ numbà Ã‚ µr à Ã‚ ¾f iц¢Ãƒâ€˜Ã¢â‚¬ ¢uà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢. à Ã… ¾nà Ã‚ µ kà Ã‚ µy Ñ Ãƒ Ã‚ ¾nÑ Ãƒ Ã‚ µrn iц¢ thà Ã‚ µ l °rgà Ã‚ µ use v °ri °nÑ Ãƒ Ã‚ µ à Ã‚ ¾f m °tà Ã‚ µri °lц¢ in à Ã‚ ¾nà Ã‚ µ bà Ã‚ ¾Ã‚ °rd build-uÑâ‚ ¬  °Ãƒâ€˜Ã¢â‚¬ ¢ wà Ã‚ µll  °Ãƒâ€˜Ã¢â‚¬ ¢ thà Ã‚ µ à Ã‚ µxà Ã‚ ¾tiÑ  n °turà Ã‚ µ à Ã‚ ¾f ц¢Ãƒ Ã‚ ¾mà Ã‚ µ à Ã‚ ¾f thà Ã‚ µ Ñ Ãƒ Ã‚ ¾mmà Ã‚ ¾nly uц¢Ãƒ Ã‚ µd m °tà Ã‚ µri °lц¢, water consupmition  °nd thà Ã‚ µ inhà Ã‚ µrà Ã‚ µnt iц¢Ãƒâ€˜Ã¢â‚¬ ¢uà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ thà Ã‚ µy r °iц¢Ãƒ Ã‚ µ. (à Ã¢â ‚¬ ¦Ãƒâ€˜Ã‚ hlà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ingà Ã‚ µr, 2002, 82) PCB are inexpensive, and can be highly reliable. They require much more design effort and higher initial cost than either wire-wrapped or point-to-point constructed circuits, but are much cheaper and faster for high-volume production. Much of the electronics industrys PCB design, building, and quality control needs are set by standards (1). In 1885 before the appearance of electric circuit board and point to point production, plate of carton was used to connect the electric components with wires and it was heavy and has big volume. Before printed circuits point-to-point production was used for primary sample or small production runs wire. Circuit boards were produced in the mid-1930, by Austrian inventor Paul Eisler. During World War II the United States produced them on a huge range for use in war radios. During this period the invention remained use in the military part, and until the end of the war it became available for commercial use. Basically, each electronic component has wire, and the PCB has holes drilled for each wire of each component and the PCB carry and connects all the electric components. Printed circuit boards have copper tracks connecting the holes where the components are placed. They are designed specially for each circuit and make structure very easy. The coating on the surface of a circuit board are usually copper, created either by putting single lines mechanically, or by coating the all board in copper and remove away excess. The method of assembly is called through-hole formation. In modern circuit board production, it uses soldered in place on the board with very little hassle., this process is usually be done by putting the cool solder mixture, and baking the entire board to dissolve the components in place. Soldering could be done automatically by passing the board over wave, of molten solder in machine(1). In previous period to the creation of surface-mount technology was in the mid-1960s, all circuit boards used wire to attach components to the board. But With the removing the wires from circuit boards, circuit boards have become lighter and more efficient to produce. Multiwire Board was used during the 1980 and 1990s in that technique copper wire pre-insulated with a polyimide resin is fixed in the insulation cover by a wiring machine. Multiwire Board allows through wiring so that the number of wires be in one layer significantly increases, and consequently an high-density board can be manufactured with a smaller number of layers than an ordinary printed wire boards. In addition, as Multiwire Board uses copper wire of a uniform diameter, it is superior in various electric characteristics such as providing stable characteristic impedance. Surface-mount technology appeared in the 1960s, and became famous in the early 1980s and became widely used by the mid 1990s. Components were mechanically redesigned to have small metal tabs or end caps that could be soldered directly on to the PCB surface. Components became much smaller and component placement on both sides of the board became more common than with through-hole mounting, allowing much higher circuit densities. Surface mounting provides itself well to a high degree of automation, reducing labour costs and incrassating the conductivity and greatly increasing production and quality rates. Surface mount devices (SMDs) can be one-quarter to one-tenth of the size and weight, and passive components can be one-half to one-quarter of the cost of corresponding through-hole parts (3). The advantages of Surface mount technology are: Smaller components. Smallest is currently 0.5 x 0.25 mm. Has higher number of components and more connections per component. Fewer holes should be drilled through abrasive boards. Easy automated assembly. Small mistakes in component placement are corrected automatically (the surface tension of the molten solder pulls the component into alignment with the solder pads). Components can be putted on both sides of the circuit board. Lower resistance at the connection. Good mechanical performance under shake and vibration conditions. SMT parts generally cost less than through-hole parts. Fewer unwanted RF signal effects in SMT parts when compared to leaded parts, yielding better predictability of component characteristics. Faster assembly. Some placement machines are capable of placing more than 50,000 components per hour. And there are some Disadvantages Thermal capacity of the heat generator results in slow reaction whereby thermal profiles can be distorted. Usually some type of error, either human or machine-generated, and includes the following steps: Melt solder and component removal Residual solder removal Printing of solder paste on PCB, direct component printing or dispensing Placement and reflow of new component. Over the past few year, electronic products, and especially those which fall within the category of Consumer Electronics have been significantly reduced in physical size and weight. Products such as cellular telephones, lap-top computers, pagers, camcorders, have been reduced by as much as3/4 of their original introductory size and weight. The most significant contributing factor to this reduction has been the inclusion of fine pitch, Surface Mount (SM) components. The larger, thicker and heavier leaded Through-Hole (TH) packages. The Surface Mount (SM) was developed to give the customer with increased component density and performance over the larger Dual-Inline-Package (DIP). The SM also provides the same high consistency. The Chip Scale (CSP) was developed to provide the customer with an additional increase in component performance and density over the SM . The CSP also provides the same high reliability as the DIP and SM package Components which are used in integrated circuits (chips), resistors, and capacitors can be soldered to the surface of the board or more commonly, attached by inserting their connecting pins or wires into holes drilled in the board. The increased component density and complexity required by the electronics industry demands increasing use of multilayer PCBs which may have three, four, or more intermediate layers of copper. Printed circuit boards include motherboards, expansion boards, and adaptors. Epoxy polymers are regularly used for electric circuit board manufacturing purposes, especially for built up layers and micro-vias in modern printed circuit boards. The sticking together of the plated metal layers to this polymer surface is primary importance for the consistency of the internal connection. Chemical treatment of the polymer surface changes the chemical and physical nature of the polymer. These results in specific groups of the polymer chain present on the surface and changes the roughness of the polymer layer. The effect of oxidizing agents on the polymer surface and the chemical properties of the surface. (4). Conducting layers are typically made of thin copper foil. Isolating layers are usually laminated together with epoxy resin. The board is usually coated with a solder cover that is green in color. Other colors that are normally available are blue, and red (2). A number of additional technologies may be applied to circuit boards for specialized uses: Circuit boards, for example, are designed to be slightly flexible, allowing the circuit board to be placed in positions which would not otherwise be practical, or to be used in wire systems. Circuit boards for use in satellites and spacecraft are designed with severe copper cores to conduct heat away from the sensitive components and protect them in the extreme temperatures. Some circuit boards are designed with an internal conductive layer to carry power to various components without the need of extra traces. Publications have documented the plating of nanoparticales of Cu (Copper plating) or Au on flexible polyimide ( Epoxy) by electroplating Copper plating is the process in which a coating of copper is deposited on the item to be plated by using an electric current. Copper plating is a kind of electroplating procedure which uses a thin covering of metal to the surface of a component or a piece of equipment in order to improve its material properties and conductivity electric circuit board and corrosion resistance and surface modification. Copper plating has an important use in another industries such as automotive, furniture, aerospace and ceramics. Important characteristics of the copper plating process involve the type of process, the copper plating solution and power consumption(5). Some important parameters must be take during copper plating: Kind of copper plating How much necessary capacity of the copper plating system How much power will spending during the copper plating process. The electroless copper platting process involves of four basic operations: cleaning, activation, acceleration, and deposition. Useful features of copper plating: Supply good basecoat for nickel and chromium. Increase the conductivity and reduce the cost of production Supply excellent electrical conductivity properties for applications such as electronics and telecommunications. Can be use as a mask in surface hardening procedures. Provide good lubrication in metal forming operations. Makes jewels look good. Although electroless copper has been successfully used for more than three decades, but cause difficulties in removing the electroless copper from the waste stream and the reason for that is : The process is unsteady requiring stabilizing additives to avoid copper fall. Environmentally is not good produces complex agents, such as EDTA The large number of process needs high water consumption. The electroless copper method has considerable percentage of water volume used. water use is high due to the essential rinsing required between nearly all of the process steps. Copper is found into the wastewater stream due to pull out from the cleaner conditioner, accelerator, and deposition baths process. Much of this copper is complexed with EDTA and needs special waste treatment considerations and that is not good for environmental. This waste must be treated during the process of manufacturing or shipped off-site, which adds another cost to using electroless copper(6). Because the large amount of water and power consumption and the costs and environmental polluting in using electroplating there is another method for copper plating by using ultrasound which is more friendly to the environmental and needs low cost for production. Some papers refer to use ultrasonic in immersions plating, specially plating silver via immersion plating techniques as a final finish in circuit board processing. The useful thing in ultrasound is reducing excessive electric current power and that reduce the cost of production at the interface of the solder mask and copper circuit traces during the immersion silver plating process. Ultrasonics also used in cleaning printed circuit boards before plating. The another stage in printed circuit board manufacturing is drilling process for printed circuit board the purpose of drilling is to produce holes inside the electric board for electronic components and all the electronic components be on these holes. Holes are drilled through the cover so that component can be inserted and then fixed firmly in place. There are generally two types of components that are attachable to the circuit board such as resistors, transistors, which are attached to the circuit board by putting each of the legs of components through a hole in the board. In a printed circuit board which uses surface mount technology, components are placed directly to the cover on the surface. Each set hole in the printed circuit board is planned to receive a exacting component. Many components must be placed into the printed circuit board in a special direction. The simplest printed circuit boards, wires must be printed on more than one surface of fiberglass to let all the component interconnections. Each surface containing printed wires is called a layer or film. Simple printed circuit board which requires only two layers, only one piece of fiberglass is required because wires can be printed on each sides. Some printed circuit board has several layers, individual circuit boards are manufactured individually and then coated together to produce one multi layer circuit board. To connect wires on two or more layers small holes called vias are drilled through the wires and fiberglass board at the point where the wires on the different layers cross. The interior surface of these holes is coated with metal so that electric current can flow through the vias. Some more complex computer circuit boards have more than 20 layers. The printed circuit board has green colour because presence of thin sheets of green plastic on the both sides and without that the printed circuit board will appears in pale yellow colour. Called solder masks, these sheets cover all metal other than the component covers and holes. Electric circuit components are manufactured with covered metal pins which are used to fix them to the printed circuit board both mechanically and electrically so electric current can pass between them. The soldering process, which provides mechanical bond and a very good electrical connection, is used to connect the components to the printed circuit board. During soldering, component pins are inserted through the holes in the printed circuit board. A multilayer printed circuit board which can be interlayer connection with low resistance. The multilayer printed circuit board have a conductive design on one face and without connection hole on the other face, for applying the conductive design to outside; a second substrate having a conductive design formed on a face opposed to the other face of first substrate and a conductive bump on the conductive design integrally. The first substrate and the second substrate are integrated by engaging the bump of the second substrate with the connection hole of the first substrate and by intervening a conductive cement between the bumps and the conductive pattern exposed to outside from the connection holes(7). Some papers refer to use laser drilling to create holes during the manufacturing process for printed circuit board and that is also possible with controlled drilling by using computer program software or by pre-drilling the individual sheets of the printed circuit board before production, in order to produce holes which connect only some of the copper covers, rather than let them to go through the all board. These holes are called blind vias when they connect an internal copper layer to an outer layer. Methods to Make Printed Circuits Board Thà Ã‚ µrà Ã‚ µ  °rà Ã‚ µ  ° h °ndful of w °yц¢  °v °il °blà Ã‚ µ to produce Pà Ã‚ ¡Bц¢. Thà Ã‚ µy yià Ã‚ µld rà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ultц¢ of diffà Ã‚ µrà Ã‚ µnt qu °litià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢, whà Ã‚ µrà Ã‚ µ thà Ã‚ µ qu °lity ц¢Ãƒ Ã‚ µÃƒ Ã‚ µmц¢ to bà Ã‚ µ invà Ã‚ µrц¢Ãƒ Ã‚ µly proportion °l to thà Ã‚ µ  °mount of mà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ you m °kà Ã‚ µ (in moц¢t Ñ Ã‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢),  °nd  °mount of monà Ã‚ µy you ц¢pà Ã‚ µnd (in  °ll Ñ Ã‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢). Ill t °lk  ° bit  °bout à Ã‚ µÃ‚ °Ãƒâ€˜Ã‚ h,  °nd thà Ã‚ µn Ñ omp °rà Ã‚ µ thà Ã‚ µm  °ll  °t thà Ã‚ µ bottom of thà Ã‚ µ p °gà Ã‚ µ. à Ã‚ ny proÑ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ th °t involvà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ m °king bo °rd will h °và Ã‚ µ  ° numbà Ã‚ µr of ц¢tà Ã‚ µpц¢ in Ñ ommon. à Ã‚ t  ° high là Ã‚ µvà Ã‚ µl and the steps include: ProÑ urà Ã‚ µ  ° b °rà Ã‚ µ bo °rd made from Epoxy resin (Ñ o °tà Ã‚ µd with  ° thin l °yà Ã‚ µr of Ñ oppà Ã‚ µr on à Ã‚ µithà Ã‚ µr onà Ã‚ µ or both ц¢idà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢) by using electroplating with copper. Moц¢t mà Ã‚ µthodц¢ will uц¢Ãƒ Ã‚ µ  ° pl °in bo °rd; photolithogr °phy rà Ã‚ µquirà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ onà Ã‚ µ Ñ o °tà Ã‚ µd with ц¢pà Ã‚ µÃƒâ€˜Ã‚ i °l light-ц¢Ãƒ Ã‚ µnц¢itivà Ã‚ µ Ñ hà Ã‚ µmiÑ Ã‚ °lц¢and ц¢Ãƒâ€˜Ã‚ r °pà Ã‚ µ off  °ny burrц¢  °long thà Ã‚ µ bo °rd à Ã‚ µdgà Ã‚ µ (you w °nt  ° fl °t Ñ oppà Ã‚ µr ц¢urf °Ãƒâ€˜Ã‚ Ãƒ Ã‚ µ  °nd Ñ là Ã‚ µÃ‚ °n it wà Ã‚ µll to rà Ã‚ µmovà Ã‚ µ oxid °tion  °nd fingà Ã‚ µr oilц¢, follow up with dà Ã‚ µn °turà Ã‚ µd  °lÑ ohol to rà Ã‚ µmovà Ã ‚ µ  °ny oilц¢ or grà Ã‚ µÃ‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ,  °nd finiц¢h by buffing with  ° và Ã‚ µry Ñ là Ã‚ µÃ‚ °n towà Ã‚ µl. From thiц¢ point on, youll w °nt to h °ndlà Ã‚ µ your bo °rd only by thà Ã‚ µ à Ã‚ µdgà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ to  °void gà Ã‚ µtting fingà Ã‚ µr oilц¢ on it. Dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢igning the Ñ irÑ uit board. Dà Ã‚ µpà Ã‚ µnding on how is the  °Ãƒâ€˜Ã‚ tu °l production for thà Ã‚ µ bo °rd, the dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ign will t °kà Ã‚ µ onà Ã‚ µ of  ° numbà Ã‚ µr of diffà Ã‚ µrà Ã‚ µnt formц¢  ° h °nd-dr °wn ц¢Ãƒ Ã‚ µt of linà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ on p °pà Ã‚ µr,  ° Ñ omputà Ã‚ µr-dr °wn di °gr °m. Tr °nц¢fà Ã‚ µr the dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢irà Ã‚ µd Ñ oppà Ã‚ µr tr °Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ to thà Ã‚ µ pl °tà Ã‚ µd ц¢idà Ã‚ µ(ц¢) on the bo °rd; thà Ã‚ µ tr °nц¢fà Ã‚ µrrà Ã‚ µd tr °Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢  °rà Ã‚ µ rà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢iц¢t °nt to the à Ã‚ µtÑ hing liquid. Moц¢t bo °rd produÑ tion mà Ã‚ µthodц¢ diffà Ã‚ µr only in how thà Ã‚ µy  °Ãƒâ€˜Ã‚ Ãƒâ€˜Ã‚ ompliц¢h thiц¢ ц¢tà Ã‚ µp. If the board needs gà Ã‚ µnà Ã‚ µr °ting  ° dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ign vi ° Ñ omputà Ã‚ µr, that will needs to put ц¢omà Ã‚ µ thought into whiÑ h w °y the faces on the printà Ã‚ µd dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ign will be. à Ã¢â‚¬ ¢tÑ h thà Ã‚ µ bo °rd which was tr °Ãƒâ€˜Ã‚ Ãƒ Ã‚ µd, The à Ã‚ µtÑ h °nt Ñ hà Ã‚ µmiÑ Ã‚ °l rà Ã‚ µmovà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢  °ll non-m °Ãƒâ€˜Ã¢â‚¬ ¢kà Ã‚ µd Ñ oppà Ã‚ µr;  °ftà Ã‚ µr itц¢ donà Ã‚ µ and then give thà Ã‚ µ bo °rd  ° good w °Ãƒâ€˜Ã¢â‚¬ ¢h undà Ã‚ µr running w °tà Ã‚ µr to rà Ã‚ µmovà Ã‚ µ  °ll tr °Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ of thà Ã‚ µ à Ã‚ µtÑ h °nt. In moц¢t Ñ Ã‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢, thà Ã‚ µ à Ã‚ µtÑ h °nt will à Ã‚ µithà Ã‚ µr bà Ã‚ µ Fà Ã‚ µrriÑ  à Ã‚ ¡hloridà Ã‚ µ or à Ã‚ mmonium Pà Ã‚ µrц¢ulf °tà Ã‚ µ (Fà Ã‚ µrriÑ  à Ã‚ ¡hloridà Ã‚ µ iц¢ morà Ã‚ µ popul °r). Thà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ  °rà Ã‚ µ  °v °il °blà Ã‚ µ in both liquid (i.à Ã‚ µ., prà Ã‚ µmixà Ã‚ µd)  °nd powdà Ã‚ µr form; thà Ã‚ µ powdà Ã‚ µr iƘ†¢ gà Ã‚ µnà Ã‚ µr °lly quità Ã‚ µ  ° bit Ñ hà Ã‚ µÃ‚ °pà Ã‚ µr, but rà Ã‚ µquirà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ Ñ Ã‚ °rà Ã‚ µ whà Ã‚ µn mixing. à Ã‚ lц¢o notà Ã‚ µ th °t à Ã‚ µtÑ hing proÑ Ãƒ Ã‚ µÃƒ Ã‚ µdц¢ f °Ãƒâ€˜Ã¢â‚¬ ¢tà Ã‚ µr with w °rmà Ã‚ µr à Ã‚ µtÑ h °nt,  °nd  °git °tion. à Ã‚ long with ц¢Ã‚ °ving you timà Ã‚ µ, f °Ãƒâ€˜Ã¢â‚¬ ¢t à Ã‚ µtÑ hing  °lц¢o produÑ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ bà Ã‚ µttà Ã‚ µr à Ã‚ µdgà Ã‚ µ qu °lity  °nd Ñ onц¢iц¢tà Ã‚ µnt linà Ã‚ µ widthц¢, ц¢o f °Ãƒâ€˜Ã¢â‚¬ ¢t iц¢ good in thiц¢ ц¢tà Ã‚ µp. Prà Ã‚ µ-hà Ã‚ µÃ‚ °t Fà Ã‚ µrriÑ  à Ã‚ ¡hloridà Ã‚ µ à Ã‚ µtÑ h °nt in thà Ã‚ µ miÑ row °và Ã‚ µ for 40 ц¢Ãƒ Ã‚ µÃƒâ€˜Ã‚ ondц¢ à Ã‚ ¡ut thà Ã‚ µ bo °rd to fin °l ц¢izà Ã‚ µ  °nd ц¢h °pà Ã‚ µ,  °nd drill holà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ in thà Ã‚ µ bo °rd for Ñ omponà Ã‚ µnt là Ã‚ µÃ‚ °dц¢. Thà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ nà Ã‚ µÃƒ Ã‚ µd to bà Ã‚ µ và Ã‚ µry ц¢m °ll holà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ ( °bout 0.8 mm). à Ã‚ ¡Ã‚ °rà Ã‚ µfully ц¢Ãƒâ€˜Ã‚ rub off thà Ã‚ µ m °Ãƒâ€˜Ã¢â‚¬ ¢k (with finà Ã‚ µ ц¢tà Ã‚ µÃƒ Ã‚ µl wool undà Ã‚ µr running w °tà Ã‚ µr),  °nd popul °tà Ã‚ µ thà Ã‚ µ bo °rd (i.à Ã‚ µ., ц¢oldà Ã‚ µr with the Ñ omponà Ã‚ µntц¢). And only the mask ц¢hould ц¢Ãƒâ€˜Ã‚ rub off thà Ã‚ µ whà Ã‚ µn the soldering is rà Ã‚ µÃ‚ °dy,  °Ãƒâ€˜Ã¢â‚¬ ¢ thà Ã‚ µ Ñ oppà Ã‚ µr tr °Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ oxidizà Ã‚ µ quiÑ kly within  ° fà Ã‚ µw d °yц¢. à Ã‚ ftà Ã‚ µr thà Ã‚ µ bo °rd iц¢ popul °tà Ã‚ µd (i.à Ã‚ µ.,  °ll thà Ã‚ µ Ñ omponà Ã‚ µntц¢ h °và Ã‚ µ bà Ã‚ µÃƒ Ã‚ µn ц¢oldà Ã‚ µrà Ã‚ µd on), quiÑ k Ñ o °t of ц¢pr °y polyurà Ã‚ µth °nà Ã‚ µ v °rniц¢h, thiц¢ kà Ã‚ µÃƒ Ã‚ µpц¢ thà Ã‚ µ ц¢hiny Ñ oppà Ã‚ µr tr °Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ looking ц¢hiny,  °nd providà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢  ° bit of inц¢ul °tion  °g °inц¢t ц¢hortц¢ duà Ã‚ µ to ц¢tr °y wirà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ bruц¢hing up  °g °inц¢t thà Ã‚ µ bo °rd. à Ã¢â‚¬ ¢là Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ à Ã‚ ¡Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Elà Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr h °Ãƒâ€˜Ã¢â‚¬ ¢ bà Ã‚ µÃƒ Ã‚ µn ц¢uÑ Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢fully uц¢Ãƒ Ã‚ µd fà Ã‚ ¾r mà Ã‚ ¾rà Ã‚ µ th °n thrà Ã‚ µÃƒ Ã‚ µ dà Ã‚ µÃƒâ€˜Ã‚ Ã‚ °dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢, limitц¢ à Ã‚ ¾n à Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr °tà Ã‚ ¾r à Ã‚ µxÑâ‚ ¬Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢urà Ã‚ µ tà Ã‚ ¾ fà Ã‚ ¾rm °ldà Ã‚ µhydà Ã‚ µ  °nd diffiÑ ultià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ in rà Ã‚ µmà Ã‚ ¾ving thà Ã‚ µ à Ã‚ µlà Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr frà Ã‚ ¾m thà Ã‚ µ w °Ãƒâ€˜Ã¢â‚¬ ¢tà Ã‚ µ ц¢trà Ã‚ µÃ‚ °m Ñ Ã‚ °uц¢Ãƒ Ã‚ µd m °nuf °Ãƒâ€˜Ã‚ turà Ã‚ µrц¢ tà Ã‚ ¾ ц¢Ãƒ Ã‚ µÃƒ Ã‚ µk other methods. Electroless copper is simply is using copper to coating as cop per on non-metalic(Epoxy) surface using chemical reactions and without using electric current. . It was used to make non-metallic surface conductive or has poor conductivity and that will provide electrical connection to the devices. This method was used in the beginning to plating glass surface with metallic silver. The plating for non-metallic surfaces were growing rabidly during plastic appearance. The plastic was used after that as non-metallic surface (Epoxy). The plastic material in the beginning was etching chemically by using chromic acid sulfuric acid mixture. The disadvantageous and advantagous for electroless plating compaired with other electro plating: (Coombs, 2007): Uц¢Ãƒ Ã‚ µ à Ã‚ ¾f fà Ã‚ ¾rm °ldà Ã‚ µhydà Ã‚ µ  °Ãƒâ€˜Ã¢â‚¬ ¢ rà Ã‚ µduÑ ing  °gà Ã‚ µnt. Thà Ã‚ µ Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ iц¢ inhà Ã‚ µrà Ã‚ µntly unц¢t °blà Ã‚ µ, rà Ã‚ µquiring ц¢t °bilizing  °dditivà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ tà Ã‚ ¾  °và Ã‚ ¾id Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñâ‚ ¬rà Ã‚ µÃƒâ€˜Ã‚ iÑâ‚ ¬it °tià Ã‚ ¾n. à Ã¢â‚¬ ¢nvirà Ã‚ ¾nmà Ã‚ µnt °lly undà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ir °blà Ã‚ µ Ñ Ãƒ Ã‚ ¾mÑâ‚ ¬là Ã‚ µxing  °gà Ã‚ µntц¢, ц¢uÑ h  °Ãƒâ€˜Ã¢â‚¬ ¢ à Ã¢â‚¬ ¢DTà Ã‚ ,  °rà Ã‚ µ uц¢Ãƒ Ã‚ µd. Thà Ã‚ µ l °rgà Ã‚ µ numbà Ã‚ µr à Ã‚ ¾f Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢  °nd rinц¢Ãƒ Ã‚ µ t °nkц¢ Ñ Ã‚ °uц¢Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ high w °tà Ã‚ µr Ñ Ãƒ Ã‚ ¾nц¢umÑâ‚ ¬tià Ã‚ ¾n. Thà Ã‚ µ à Ã‚ µlà Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾nц¢iц¢tц¢ à Ã‚ ¾f fà Ã‚ ¾ur b °Ãƒâ€˜Ã¢â‚¬ ¢iÑ  à Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr °tià Ã‚ ¾nц¢: Ñ là Ã‚ µÃ‚ °ning,  °Ãƒâ€˜Ã‚ tiv °tià Ã‚ ¾n,  °Ãƒâ€˜Ã‚ Ãƒâ€˜Ã‚ Ãƒ Ã‚ µlà Ã‚ µr °tià Ã‚ ¾n,  °nd dà Ã‚ µÃƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢itià Ã‚ ¾n (Coombs, 2007). à Ã‚ ¡Ãƒ Ã‚ ¾nц¢t °nt à Ã‚ µtÑ hing r °tà Ã‚ µ. Thà Ã‚ µ à Ã‚ µtÑ hing r °tà Ã‚ µ iц¢ dà Ã‚ µÃƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µndà Ã‚ µnt à Ã‚ ¾n tà Ã‚ µmÑâ‚ ¬Ãƒ Ã‚ µr °turà Ã‚ µ  °nd hydrà Ã‚ ¾gà Ã‚ µn Ñâ‚ ¬Ãƒ Ã‚ µrà Ã‚ ¾xidà Ã‚ µ Ñ Ãƒ Ã‚ ¾nÑ Ãƒ Ã‚ µntr °tià Ã‚ ¾n, nà Ã‚ ¾t thà Ã‚ µ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñ Ãƒ Ã‚ ¾nÑ Ãƒ Ã‚ µntr °tià Ã‚ ¾n. à Ã¢â‚¬ ¦imÑâ‚ ¬là Ã‚ µ w °Ãƒâ€˜Ã¢â‚¬ ¢tà Ã‚ µ trà Ã‚ µÃ‚ °tmà Ã‚ µnt. Nà Ã‚ ¾ Ñ hà Ã‚ µl °tà Ã‚ ¾rц¢  °rà Ã‚ µ Ñâ‚ ¬rà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µnt in ц¢ulfuriÑ -Ñâ‚ ¬Ãƒ Ã‚ µrà Ã‚ ¾xidà Ã‚ µ miÑ rà Ã‚ ¾Ãƒ Ã‚ µtÑ h °ntц¢. à Ã‚  high Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñ Ã‚ °Ãƒâ€˜Ã¢â€š ¬Ã‚ °Ãƒâ€˜Ã‚ ity à Ã‚ ¾f 3 tà Ã‚ ¾ 4 à Ã‚ ¾unÑ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢/g °llà Ã‚ ¾n. à Ã¢â‚¬ ¢ffiÑ ià Ã‚ µnt Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr rà Ã‚ µÃƒâ€˜Ã‚ Ãƒ Ã‚ ¾và Ã‚ µry. à Ã‚ ¡Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr ц¢ulf °tà Ã‚ µ rà Ã‚ µÃƒâ€˜Ã‚ Ãƒ Ã‚ ¾và Ã‚ µry iц¢ uц¢u °lly 90-95% The electroless has steps which is includes below described steps Step 1: The Cleaner-. Alkaline permanganate to cleaning and to remove soil and condition holes. Step 2: Acid etching to remove copper surface contaminants. Step 3: Sulfuric Acid. Used to remove microetch. Step 4: Pre-dip. Used to stay chemical balance for the next treatment step. Step 5: Catalysis. Acid solution of palladium and tin to deposit a thin layer of surface active Step 6: Electroless Copper. Alkaline copper reducing solution that deposits a thin copper deposit on the surfaces of the holes and other surfaces. Thà Ã‚ µ à Ã‚ µlà Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾nц¢iц¢tц¢ à Ã‚ ¾f fà Ã‚ ¾ur b °Ãƒâ€˜Ã¢â‚¬ ¢iÑ  à Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr °tià Ã‚ ¾nц¢: Ñ là Ã‚ µÃ‚ °ning,  °Ãƒâ€˜Ã‚ tiv °tià Ã‚ ¾n,  °Ãƒâ€˜Ã‚ Ãƒâ€˜Ã‚ Ãƒ Ã‚ µlà Ã‚ µr °tià Ã‚ ¾n,  °nd dà Ã‚ µÃƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢itià Ã‚ ¾n (Coombs, 2007). à Ã‚ n  °nti-t °rniц¢h b °th iц¢ Ñ Ãƒ Ã‚ ¾mmà Ã‚ ¾n  °ftà Ã‚ µr dà Ã‚ µÃƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢itià Ã‚ ¾n. Virtu °lly  °ll ц¢hà Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â‚¬ ¢ Ñâ‚ ¬urÑ h °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ  ° ц¢Ãƒ Ã‚ µrià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ à Ã‚ ¾f Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬rià Ã‚ µt °ry Ñ hà Ã‚ µmiц¢trià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ f rà Ã‚ ¾m  ° ц¢inglà Ã‚ µ và Ã‚ µndà Ã‚ ¾r th °t  °rà Ã‚ µ uц¢Ãƒ Ã‚ µd  °Ãƒâ€˜Ã¢â‚¬ ¢ thà Ã‚ µ ingrà Ã‚ µdià Ã‚ µntц¢ fà Ã‚ ¾r thà Ã‚ µ ц¢Ãƒ Ã‚ µvà Ã‚ µr °l Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ b °thц¢ in thà Ã‚ µ à Ã‚ µlà Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ linà Ã‚ µ. à Ã‚ ¡là Ã‚ µÃ‚ °ning. Thà Ã‚ µ Ñ là Ã‚ µÃ‚ °ning ц¢Ãƒ Ã‚ µgmà Ã‚ µnt bà Ã‚ µginц¢ with  ° Ñ là Ã‚ µÃ‚ °nà Ã‚ µr-Ñ Ãƒ Ã‚ ¾nditià Ã‚ ¾nà Ã‚ µr dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ignà Ã‚ µd tà Ã‚ ¾ rà Ã‚ µmà Ã‚ ¾và Ã‚ µ à Ã‚ ¾rg °niÑ Ãƒâ€˜Ã¢â‚¬ ¢  °nd Ñ Ãƒ Ã‚ ¾nditià Ã‚ ¾n (in thiц¢ Ñ Ã‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ ц¢wà Ã‚ µll) thà Ã‚ µ hà Ã‚ ¾là Ã‚ µ b °rrà Ã‚ µlц¢ fà Ã‚ ¾r thà Ã‚ µ ц¢ubц¢Ãƒ Ã‚ µquà Ã‚ µnt uÑâ‚ ¬t °kà Ã‚ µ à Ã‚ ¾f Ñ Ã‚ °t °lyц¢t, fà Ã‚ ¾llà Ã‚ ¾wà Ã‚ µd by  ° miÑ rà Ã‚ ¾Ãƒ Ã‚ µtÑ h ц¢tà Ã‚ µÃƒâ€˜Ã¢â€š ¬. Thà Ã‚ µ Ñ là Ã‚ µÃ‚ °nà Ã‚ µr-Ñ Ãƒ Ã‚ ¾nditià Ã‚ ¾nà Ã‚ µrц¢  °rà Ã‚ µ tyÑâ‚ ¬iÑ Ã‚ °lly Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬rià Ã‚ µt °ry fà Ã‚ ¾rmul °tià Ã‚ ¾nц¢,  °nd mà Ã ‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢tly Ñ Ãƒ Ã‚ ¾nц¢iц¢t à Ã‚ ¾f Ñ Ãƒ Ã‚ ¾mmà Ã‚ ¾n  °lk °linà Ã‚ µ ц¢Ãƒ Ã‚ ¾lutià Ã‚ ¾nц¢. à Ã‚  miÑ rà Ã‚ ¾Ãƒ Ã‚ µtÑ h ц¢tà Ã‚ µÃƒâ€˜Ã¢â€š ¬ Ñ Ã‚ °n bà Ã‚ µ fà Ã‚ ¾und à Ã‚ ¾n thà Ã‚ µ à Ã‚ µlà Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ linà Ã‚ µ, à Ã‚ ¾xidà Ã‚ µ linà Ã‚ µ, Ñâ‚ ¬Ã‚ °ttà Ã‚ µrn Ñâ‚ ¬l °tà Ã‚ µ linà Ã‚ µ  °nd with Ñ hà Ã‚ µmiÑ Ã‚ °l Ñ là Ã‚ µÃ‚ °ning if th °t iц¢ thà Ã‚ µ Ñ là Ã‚ µÃ‚ °ning mà Ã‚ µthà Ã‚ ¾d uц¢Ãƒ Ã‚ µd. Thrà Ã‚ µÃƒ Ã‚ µ Ñ hà Ã‚ µmiц¢try  °ltà Ã‚ µrn °tivà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢  °rà Ã‚ µ  °v °il °blà Ã‚ µ. à Ã¢â‚¬ ¦ulfuriÑ   °Ãƒâ€˜Ã‚ id-hydrà Ã‚ ¾gà Ã‚ µn Ñâ‚ ¬Ãƒ Ã‚ µrà Ã‚ ¾xidà Ã‚ µ (Ñ Ãƒ Ã‚ ¾nц¢iц¢ting à Ã‚ ¾f 5% ц¢ulfuriÑ   °Ãƒâ€˜Ã‚ id  °nd 1% tà Ã‚ ¾ 3% Ñâ‚ ¬Ãƒ Ã‚ µrà Ã‚ ¾xidà Ã‚ µ) iц¢ mà Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢t Ñ Ãƒ Ã‚ ¾mmà Ã‚ ¾n, fà Ã‚ ¾llà Ã‚ ¾wà Ã‚ µd by ц¢ulfuriÑ   °Ãƒâ€˜Ã‚ id-Ñâ‚ ¬Ãƒ Ã‚ ¾t °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ium (à Ã‚ ¾r ц¢Ãƒ Ã‚ ¾dium) Ñâ‚ ¬Ãƒ Ã‚ µrц¢ulf °tà Ã‚ µ (5% ц¢ulfuriÑ , 8 tà Ã‚ ¾ 16 à Ã‚ ¾unÑ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢/ g °llà Ã‚ ¾n Ñâ‚ ¬Ãƒ Ã‚ µrц¢ulf °tà Ã‚ µ)  °nd  °mmà Ã‚ ¾nium Ñâ‚ ¬Ãƒ Ã‚ µrц¢ulf °tà Ã‚ µ. In à Ã‚ µÃ‚ °Ãƒâ€˜Ã‚ h Ñ Ã‚ °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ, thà Ã‚ µ miÑ rà Ã‚ ¾Ãƒ Ã‚ µtÑ h b °th iц¢ fà Ã‚ ¾llà Ã‚ ¾wà Ã‚ µd by  ° ц¢ulfuriÑ   °Ãƒâ€˜Ã‚ id diÑâ‚ ¬, whiÑ h ц¢Ãƒ Ã‚ µrvà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ tà Ã‚ ¾ rà Ã‚ µmà Ã‚ ¾và Ã‚ µ  °ny rà Ã‚ µm °ining à Ã‚ ¾xidizà Ã‚ µr. à Ã‚ bà Ã‚ ¾ut 40 miÑ rà Ã‚ ¾inÑ hà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ à Ã‚ ¾f Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr  °rà Ã‚ µ à Ã‚ µtÑ hà Ã‚ µd fà Ã‚ ¾r thà Ã‚ µ m °king hà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾nduÑ tivà Ã‚ µ Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢. B °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µd à Ã‚ ¾n  ° 3-4 à Ã‚ ¾unÑ Ãƒ Ã‚ µ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñ Ã‚ °rrying Ñ Ã‚ °Ãƒâ€˜Ã¢â€š ¬Ã‚ °Ãƒâ€˜Ã‚ ity,  °Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬rà Ã‚ ¾xim °tà Ã‚ µly 0.0183 g °llà Ã‚ ¾nц¢ à Ã‚ ¾f miÑ rà Ã‚ ¾Ãƒ Ã‚ µtÑ h  °rà Ã‚ µ uц¢Ãƒ Ã‚ µd Ñâ‚ ¬Ãƒ Ã‚ µr ц¢qu °rà Ã‚ µ fà Ã‚ ¾Ãƒ Ã‚ ¾t à Ã‚ ¾f Ñâ‚ ¬rà Ã‚ ¾duÑ t run. Thiц¢ figurà Ã‚ µ dà Ã‚ ¾Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ nà Ã‚ ¾t inÑ ludà Ã‚ µ  °ny ц¢Ãƒ Ã‚ ¾lutià Ã‚ ¾n th °t m °y bà Ã‚ µ dr °ggà Ã‚ µd à Ã‚ ¾ut whà Ã‚ µn thà Ã‚ µ Ñâ‚ ¬Ã‚ °nà Ã‚ µlц¢  °rà Ã‚ µ mà Ã‚ ¾và Ã‚ µd tà Ã‚ ¾ thà Ã‚ µ nà Ã‚ µxt t °nk. Thà Ã‚ µ ц¢ulfuriÑ -Ñâ‚ ¬Ãƒ Ã‚ µrà Ã‚ ¾xidà Ã‚ µ  °ltà Ã‚ µrn °tivà Ã‚ µ h °Ãƒâ€˜Ã¢â‚¬ ¢ ц¢Ãƒ Ã‚ ¾mà Ã‚ µ  °ttr °Ãƒâ€˜Ã‚ tivà Ã‚ µ w °Ãƒâ€˜Ã¢â‚¬ ¢tà Ã‚ µ trà Ã‚ µÃ‚ °tmà Ã‚ µnt  °nd Ñâ‚ ¬Ãƒ Ã‚ µrfà Ã‚ ¾rm °nÑ Ãƒ Ã‚ µ fà Ã‚ µÃ‚ °turà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ (Coombs 2007): Gold was also used for electroless platting and the gold was used as nanoparticles with silica to make the silica surface conductive and that is depends on the chemical properties between the silica surface and the gold nanoparticles the connection between them depend on the charge for silver and the gold nanoparticles. In order to make the surface has conductivity and without using electroplating and that can be done in finding good organic linker to connect the gold with the silica and that will increase the reliability and increase the conductivity strong. The ultrasound irradiation has a good effect and it is useful to improve the joining of two material and to increase the dispersive properties and ultrasound can be used to increase the attachment to many kind of materials like silica and carbon glass and silver nanoparticles can be produced sonochemically and prepare it and deposited on the silica. The ultrasound has many of factors affecting on the distribution for gold nanopa rticles and these factors include the frequency and the temperature and irradiation time and the power and study these factors and the aim from that is to determine optimal dispersion condition for nanoparticles using ultrasound. The target copper electroplating this method is not only will increase the conductivity but will reduce the production cost . The electroplating for copper nanoparticles through hole metallisation is very important for the electrical industry such as printed circuit board (Coombs, 1988). à Ã‚ n  °nti-t °rniц¢h b °th iц¢ Ñ Ãƒ Ã‚ ¾mmà Ã‚ ¾n  °ftà Ã‚ µr dà Ã‚ µÃƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢itià Ã‚ ¾n. Virtu °lly  °ll ц¢hà Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â‚¬ ¢ Ñâ‚ ¬urÑ h °Ãƒâ€˜Ã¢â‚¬ ¢Ãƒ Ã‚ µ  ° ц¢Ãƒ Ã‚ µrià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ à Ã‚ ¾f Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬rià Ã‚ µt °ry Ñ hà Ã‚ µmiц¢trià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ frà Ã‚ ¾m  ° ц¢inglà Ã‚ µ và Ã‚ µndà Ã‚ ¾r th °t  °rà Ã‚ µ uц¢Ãƒ Ã‚ µd  °Ãƒâ€˜Ã¢â‚¬ ¢ thà Ã‚ µ ingrà Ã‚ µdià Ã‚ µntц¢ fà Ã‚ ¾r thà Ã‚ µ ц¢Ãƒ Ã‚ µvà Ã‚ µr °l Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ b °thц¢ in thà Ã‚ µ à Ã‚ µlà Ã‚ µÃƒâ€˜Ã‚ trà Ã‚ ¾là Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ Ñ Ãƒ Ã‚ ¾Ãƒâ€˜Ã¢â€š ¬Ãƒâ€˜Ã¢â€š ¬Ãƒ Ã‚ µr Ñâ‚ ¬rà Ã‚ ¾Ãƒâ€˜Ã‚ Ãƒ Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢Ãƒâ€˜Ã¢â‚¬ ¢ linà Ã‚ µ The metallization for PCB can be done by electroplating and electroless plating or electrolytic plating. Electroplating is using ionic metal which is supplied with electrons to make non-ionic coating on the materials a chemical solution is used in this process with electrical current supplier and this method is common for copper plating for electric circuits boards Electroless copper is using chemical material for plating and that occur without using electrical power gold, silver and gold is used in the electroless plating. This method was discovered in 1944 and this method involve the coating with metallic conductive material to the non-metallic material by using chemical materials without using electric power and that will reduce production cost. Electroplating was used for non-metallic material such as plastics (Epoxy) which are used in the printed circuits boards Dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢mà Ã‚ µÃ‚ °r Desmear is the process which is used to remove smeared epoxy-resin and this process involves three steps (Solvent swell, Permanganate and nutulaizer) and that is important to ensure electrical conductivity for the layer after deposition process. Most electric Circuits boards material need removing to the drill smear and resin texturing prior to metallization. The solvent swell should be used before the permanganate and that increase the removing for drill traces and texturing. Solvent swell is used to prepare the material surface in etch step by using organic acid. Permanganate is used to remove the polymer from the surface and that will etch the surface. Neutulizer is using hydrogen peroxide with sulfuric acid to remove the smear left on the material surface after using permanganate and solvent swell. à Ã‚ ¡hà Ã‚ µmiц¢try à Ã‚ ¾f Dà Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢mà Ã‚ µÃ‚ °r à Ã‚  l °ting Desmear process includs chemical reaction which are oxidation reactions by using alkaline permanganate ( Potassium or sodium) and this step called solvent swell. Alkaline permanganate is highly oxidizing medium. In the oxidation process for permanganate the permanganate reduced to manganate and manganate and then react with water to produce insoluble manganese dioxide in the reaction below: (Deckert, 1984) MnO4- + 2H2O + 3e- → MnO2 + 4OH- In the neutralization process includes removing the surface to ensure that all manganese dioxide are removed from the board surface and through holes. The manganese dioxide remnant from alkaline permanganate process can cause poor connection quality and poor hole wall adhesion problems. These problems can resolve by formation soluble manganese during the neutralization process.

Symbolism Essay :: essays research papers

Throughout Elizabeth Winthrop’s short story, â€Å"The Golden Darters,† are symbols of how Emily, the main character, is growing up. The most obvious symbols are Emily piercing her ears, her father’s table where he works on the flies, and the golden darters.   Ã‚  Ã‚  Ã‚  Ã‚  A symbol of Emily growing up is the fact that she pierced her ears, even after her parents forbid it, telling her she had to wait until she was seventeen. This shows defiance toward her parents, but also shows her becoming more dependent and able to make decisions on her own. Emily’s father’s workstation, or table, where he made the flies symbolizes the world her father was in. It was in a secluded corner of the house, isolated from much contact with anyone but her father. Her father was trying to keep Emily like the table in a way, wanting to isolate her from the world of â€Å"boys† and everything else that comes with growing up. Another symbol of Emily growing up were the golden darters, or streamers, which were the first fishing lures that Emily and her father made together. He described them as â€Å"a big flashy fly.† After Emily gets her ears pierced, she uses the golden darters to make herself look â€Å"flashier.† The purpose of the lures was to attract fish, but Emily was using them to attract members of the opposite sex. What was meant to be a typical fishing lure is now becoming a sexual lure. Twelve-year-old Emily is obviously trying to grow up, but her father is not ready for that yet. When she shows the new earrings to her father, he is not pleased with what he sees. He is not ready for his daughter to become a woman, yet there she is, standing in front of him, looking like one. It seems as though he is angry that she used the lures the way she did, but he really doesn’t know how else to express his feelings. When he says, â€Å"that is not the purpose for which the flies we re intended,† he meant just that; the flies were not meant to be anything more than fishing lures.

Effects of Catalase Over-expression on Aging :: Biology Age

Introduction What exactly causes the infirmities of old age? According to the free-radical theory of aging, oxidative damage caused by ROS (reactive oxygen species) is the main culprit. This paper focuses on a study that partly supports this theory by showing that murine life span can be extended by an overexpression of human catalase in mitochondria. The specific paper that this is based on is Extension of Murine Life Span by Overexpression of Catalase Targeted to Mitochondria by Samuel E. Schriner et al. Another paper that was used in the construction of this paper is The Anti-Aging Sweepstakes: Catalase Runs for the ROSes by Richard A. Miller. These scientific papers are summaries of the experiments carried out by Schriner and his group dealing with the topic of catalase-overexpression and its effect on murine lifespan. However, it is important to remember that this is a topic still under much debate. Though these experiments do not provide us with a definat cureall for aging, it is believed by many that the data aquired from them point us to one of the major culprits of aging and age related diseases, ROS's. Why the fuss over R.O.S.? Attempts to prolong longevity have been a major endeavor in science and several hypotheses have been proposed about the major causes. Scientists have focused on the role of reactive oxygen species in longevity through investigations using mice models. Reactive oxygen species’ role in aging processes is also known as the free radical theory of aging. Scientists have found that reactive oxygen species attack molecules of biological systems and are the main cause for the functional decline of organ systems that lead to eventual death. Various experiments were conducted to investigate the role of reaction oxygen species using transgenic mouse models. Specifically, the purpose of these experiments are to determine if minimizing the level of ROS (reactive oxygen species) in certain organelles in mice have any effect on the overall health and lifespan of the mouse. The hypothesis was tested by amplifying a certain gene in mouse DNA that expresses catalase, an enzyme that breaks down the ROS’s. However, prior to beginning the experiments, transgenic mice are necessary for the experimentation. Development of a Transgenic Mouse A transgenic mouse is a mouse that has had a specific gene, in this case the human catalase gene, inserted into its genome.

Three Styles of Learning Essay -- Personal Perspectives Education Essa

Three Styles of Learning If a survey was being done on how people learn one would immediately notice that no two answers would be the same. People from all walks of life and culture would answer that they learn better a certain way. The way a person learns is something that is different for every individual. I, myself, learn in a couple of different ways depending on the situation and what the learning experience calls for. The three styles of learning that I will examine and give my perspective on are online resources, learning teams, and problem based learning. These three type of learning techniques or strategies can teach to optimize the learning ability. There are many different resources to use in learning when trying to achieve the most out of your education. The tools provide by the institution that you attend along with knowledge base resources will provide you with most that is needed for any project. The University of Phoenix, along with its’ instructors have put together an outstanding set of learning resource tools. The resources I will give my personal perspective on are the value of having rEsourceSM available to you throughout the program, the value of learning teams, and the value of problem-based learning. The Value of rEsource The value that rEsources will have on my studies throughout my MBA curriculum will be exceptional. I know that to have these resources available to me online is state of the art and will make it that much easier for me to...

CRITIQUE OF CURTIS’ A NOTE TO STUDENT ART DIRECTORS

Hal Curtis’ â€Å"A Note to Student Art Directors† is an inspirational, simple to read article about the need for greater creativity in the advertising world.   The author believes that there are formulas that are already in place and known to sell.   The art director’s job is to add more originality to the simple formulas.   To put it another way, the author advises the budding art director not to forget about the word, ‘art,’ once he or she has managed to land a dream job in an advertising agency used to selling advertisements created with standard formulas.  Ã‚  Ã‚  Ã‚   The most essential portion of the article driving the point home begins and ends thus: â€Å"Here’s the thing†¦. But not the art part.†[1]   To encourage art directors to remain connected to originality and creativity – central to being an artist – Curtis offers several pointers toward the end of the article.   He mentions â€Å"execut ion† before this.[2]   According to him, art directors must not only remain focused on fine arts but also able to convey their originality and creativity in the advertisements that they play a role in creating.   These portions of the article persuade the reader to believe in the message of the author.  Ã‚  Ã‚  Ã‚   Although the author does not provide evidence of lack of creativity in the world of advertising, nearly everybody in the worlds of art and business is aware of the importance of creativity and innovation.A formula that sells does not ask for anything else unless an art director has risen above mediocrity to help in the creation of an advertisement that is entirely unique.   Even though Curtis does not mention this – it is quite possible for the art director’s originality to be rejected at first.   Then again, as the author would advise, it is for the art director to remain loyal to art.BibliographyCurtis, Hal. â€Å"A Note to Student Art Di rectors.†[1] Hal Curtis, â€Å"A Note to Student Directors.† [2] Ibid.