First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)最新文献
P. Palm, J. Maattanen, Y. de Maquille, A. Picault, J. Vanfleteren, B. Vandecasteele
{"title":"Reliability of different flex materials in high density flip chip on flex applications","authors":"P. Palm, J. Maattanen, Y. de Maquille, A. Picault, J. Vanfleteren, B. Vandecasteele","doi":"10.1109/POLYTR.2001.973285","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973285","url":null,"abstract":"This paper presents the latest results from the reliability tests of high density flip chip on flex application using anisotropically conductive adhesives. Four different types of flexible substrates and two different types of anisotropically conductive adhesives were selected. Both paste and film type anisotropically conductive adhesives were used. Two different test devices were used. The contact areas were 50/spl times/50 /spl mu/m and 50/spl times/90 /spl mu/m. The effective pitch was 80 /spl mu/m in both samples and the number of contacts was 200. The matrix of both anisotropically conductive adhesives was epoxy based and the conductive particles in film type were isolated soft metal-coated polymer particles and in paste type isolated silver particles. The contact resistance was measured with a four-point method and the series resistance with a daisy chain method. The reliability of the flip chip interconnections was tested in thermal cycling tests. Cross section samples were made to analyze the possible failure mechanism of failed contacts.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128596466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reliability studies of an isotropic electrically conductive adhesive","authors":"J. Morris, F. Anderssohn, S. Kudtarkar, E. Loos","doi":"10.1109/POLYTR.2001.973258","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973258","url":null,"abstract":"ICA reliability continues to be a source of concern for widespread practical implementations in commercial products. In addition, there is still much to be understood in the basic principles of how such materials function. This paper includes contributions in both areas, in further understanding of ICA size effects, in the interpretation of the beneficial effects of vacuum treatments before curing, with additional drop test data, and with critical comments on common electrical test techniques.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127139853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Non-migration conductive adhesives","authors":"Y. Shirai, M. Komagata, K. Suzuki","doi":"10.1109/POLYTR.2001.973261","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973261","url":null,"abstract":"Ag filled isotropic conductive adhesives (ICAs) have been investigated as promising alternatives to lead-containing solders in surface mount technology (SMT) applications. However, one serious concern is the electromigration of silver filled ICAs, especially when used in high density interconnection assembly. This paper investigates electromigration resistance of ICAs using Ag-Sn alloys as conductive fillers. It was found that electromigration resistance depends on Ag:Sn ratios and that Ag-Sn alloys containing 25/spl sim/75 mol% of Sn have excellent resistance. These new ICAs and conventional ICAs (as reference) were evaluated for SMT, using chip components with several kinds of terminations for their stability of contact resistance and adhesion strength during reliability tests. From the test results, it can be concluded that the new ICAs are suitable potential materials for SMT application.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128481180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Measurement of residual stresses in flip chip underfill resins","authors":"M. Sham, Jang‐Kyo Kim","doi":"10.1109/POLYTR.2001.973274","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973274","url":null,"abstract":"Flip chip interconnection technology provides a solution to the increasing demands for miniaturisation and weight reduction for applications in portable electronics. The technology enables direct attachment of chips to printed circuit boards through solder joints. The gap between the chip and board is encapsulated with an underfill resin to improve the mechanical/ thermal performance and thus the reliability of package. During the curing process of underfill, large residual stresses are generated due to the chemical shrinkage of polymer and the thermal mismatches between the various package components. The rheological/thermornechanical properties and curing kinetics of underfill resin are important factors that affect the magnitude and distribution of residual stresses. These thermal stresses are the principle cause of device failure after temperature cyclic tests.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122739074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Auersperg, E. Kieselstein, A. Schubert, B. Michel
{"title":"Interfacial fracture toughness tests suited for reliability enhancements of advanced plastic packages","authors":"J. Auersperg, E. Kieselstein, A. Schubert, B. Michel","doi":"10.1109/POLYTR.2001.973273","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973273","url":null,"abstract":"The growing use of advanced electronic packages under harsh environmental conditions including extreme temperatures is often a reason for damage, fatigue and failure of entire components and systems. Therefore, their thermo-mechanical reliability is becoming one of the most important preconditions for adopting it in industrial applications. Various kinds of inhomogeneity, residual stresses from several steps of the manufacturing process as well as the fact that microelectronic packages are basically compounds of materials with quite different Young's moduli and thermal expansion coefficients contribute to interface delamination, chip cracking and fatigue of solder interconnects. This paper intends to contribute to the investigation of mixed mode interface delamination phenomena in micro components by using combined numerical investigations by means of nonlinear FEA, several fracture mechanics concepts and experimental investigations using a gray scale correlation method. Interfacial fracture toughness tests commonly utilized are investigated in order to check their characteristics and, in particular, efficiency.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"74 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114011411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PC 3000-the new generation of isotropic conductive adhesives","authors":"J. Neumann-Rodekirch, Hans-Werner Hagedorn","doi":"10.1109/POLYTR.2001.973259","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973259","url":null,"abstract":"Summary form only given. The use of conductive adhesives as a completion of soldering is becoming more and more important for mounting electronic components and bare dies on substrates. The new PC 3000, a thermosetting, single-component, solvent-free, silver-filled, isotropic conductive adhesive (ICA) is presented. Application examples for the automotive and telecommunication industries are shown. Advantages like outstanding thermal conductivity are demonstrated and some special aspects with regard to properties and processing are discussed.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131443738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Trend of solder-less joint in flip chip bonding","authors":"M. Takeichi, M. Nagashima","doi":"10.1109/POLYTR.2001.973275","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973275","url":null,"abstract":"Information devices have recently shown incredible advancements in miniaturization and increased functionality. This has been supported by high density surface mounting technology, build-up technologies for multi-layer boards, the miniaturization of mounted components, advancements in chip mounting equipment, and other innovations. This paper looks specifically at flip chip bonding technology for mounting bare chips directly to the substrate. There are two types of flip chip bonding. One utilizes a metallic bond for the electrical connection, most commonly some sort of solder joint, but always using a metal-to-metal bond such as Sn-Au, conductive paste, or an ultrasonically welded Au-Au joint. Using solder, however, has problems associated with environmental concerns, as well as technical limitations on the usable pitch. The second general method of flip chip bonding uses bumps and an adhesive. In this paper, we term this \"mechanical bonding.\" It is forecast that the usage ratio of mechanical bonding will increase as pitches become finer and the drive to eliminate underfill increases. Mechanical bonding can be divided into four types: ACF (anisotropic conductive film), NCF (nonconductive film), ACP (anisotropic conductive paste), and NCP (nonconductive paste). Advanced ACFs are now in wide general use and are used with many types of electronic equipment. This is a direct result of improvements in reliability and the adoption of ACF in the LCD industry. An example of the reliability of ACF manufactured by Sony Chemicals Corporation is given. This paper also introduces other applications of ACF in the electronics industry.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114593224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Smart labels-high volume applications using adhesive flip-chip-technologies","authors":"F. Kriebel, T. Seidowski","doi":"10.1109/POLYTR.2001.973299","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973299","url":null,"abstract":"The authors present requirements, conditions and experiences for the production of smart labels in a reel-to-reel assembly technique. They compare different adhesive flip-chip technologies as well as different types of adhesives for smart label production schemes. Technology advantages for low cost substrates like PET in combination with copper or aluminium antenna tracks are presented. Besides the technology and material adaptations, electrical and mechanical properties of flip-chip interconnections are presented. In the last part of the paper, the authors present a new generation of smart labels-active working smart labels. These labels include a battery and additional electronic functions.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124117956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A long-term reliability of adhesive flip chip joints using very thin chips","authors":"A. Seppala, I. Suominen, E. Ristolainen","doi":"10.1109/POLYTR.2001.973279","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973279","url":null,"abstract":"Anisotropic conductive adhesives were used to attach daisy chained test chips on FR-4 test board. The area of the test chips was 5 mm/spl times/5 mm and the pitch was 250 /spl mu/m. Half of the test chips were thinned to the thickness of 50 /spl mu/m. Both test chip types had exactly the same test layout with peripherally situated gold bumps. Contact resistance measurements were performed using four-point and daisy chain methods. The reliability of the joints was studied by subjecting the specimens to temperature cycling and humidity tests. In addition, some of the test samples were subjected to a reflow treatment. Finally, the structure of the joints was studied with scanning electron microscopy. After 1000 cycles of the temperature cycling test both chip types showed good results. The average contact resistance of the joints had decreased, but a couple of open circuits had formed. Humidity tests caused some increase in contact resistance value. Reflow treatment did not cause significant degradation in joints.","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125547171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Smart label uses polymer thick film technology on low-cost substrates","authors":"M. Luniak, Hans-Peter Monser, V. Brod, K. Wolter","doi":"10.1109/POLYTR.2001.973301","DOIUrl":"https://doi.org/10.1109/POLYTR.2001.973301","url":null,"abstract":"A smart label represents a new generation of contactless electronic tags. It is a flexible device, which operates at a distance from a reader unit. That means that the IC chip on the smart label uses an RF antenna for its energy supply and the data transfer. The key markets of such devices are rental services, parcel services and above all logistics like airline baggage handling. This paper shows the process steps with emphasis on mass production, PET substrate reliability, low-cost paper substrates and our experiences in chip assembling with anisotropic conductive adhesive (ACA).","PeriodicalId":282338,"journal":{"name":"First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics. Incorporating POLY, PEP & Adhesives in Electronics. Proceedings (Cat. No.01TH8592)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126032817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}