Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)最新文献

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Microwave characterization of low temperature cofired ceramic
P. Pruna, R. Gardner, D. Hankey, S. Turvey
{"title":"Microwave characterization of low temperature cofired ceramic","authors":"P. Pruna, R. Gardner, D. Hankey, S. Turvey","doi":"10.1109/ISAPM.1998.664449","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664449","url":null,"abstract":"The use of low temperature cofired ceramic (LTCC) materials for the manufacture of high performance microelectronic packages operating at very high frequencies has found widespread acceptance due to LTCC's durability, compactness and manufacturability. Extensive effort has been devoted to the characterization of the electrical performance of the dielectric and associated conductor materials to determine and predict performance when constructing electronic packages that operate over a broad band of frequencies from DC through high speed digital to the microwave and millimeter bands. This effort has focused on several different areas, including the effect of operating frequency on the bulk dielectric properties of the ceramic and the electrical properties of associated thick film materials, particularly conductors. The interaction of these materials during processing, has been investigated, to determine the interdependence of these characteristics, so that both design rules and processing guidelines for particular package configurations (such as microstrip and stripline) and applications may be optimized. The Ferro A6-M ceramic, has demonstrated low dielectric constant and low dielectric loss at a wide range of frequencies, is compatible with low cost, high performance conductor materials, such as silver, and may also be used in mixed metal configurations with combinations of gold and silver conductors, in applications where such an approach is necessary. This paper reviews some of the results which have been determined in electrical characterizations such as these and proposes new electrical evaluations that may prove useful in the future.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126953794","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}
引用次数: 6
Novel technique for measuring through-plane modulus in thin polymer films 测量聚合物薄膜通过平面模量的新技术
K. Patel, P. Kohl, S. Bidstrup-Allen
{"title":"Novel technique for measuring through-plane modulus in thin polymer films","authors":"K. Patel, P. Kohl, S. Bidstrup-Allen","doi":"10.1109/ISAPM.1998.664440","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664440","url":null,"abstract":"Polymer thin films are widely used as coatings and inter-level dielectrics in microelectronic applications. In multi-layer structures, stresses generated in the films due to interaction with adjacent layers and solvent evaporation induced shrinkage, cause the polymer chains to orient in the plane of the film resulting in anisotropic film properties. Characterization of properties in all directions is essential for accurate electrical and mechanical design and modeling. A new technique has been developed to measure, in situ, the through-plane (z) stress-strain behavior of thin polymer films. A parallel plate capacitor device and an interdigitated electrode structure were used as sensors to detect changes in dielectric constant and thickness of thin polymer films under compression. Results are reported for 8-14 micrometer thick, Dow Chemical Cyclotene 3022 benzocyclobutene (BCB) films. The dielectric constant was found to change linearly with stress. Using this result, the through-plane stress-strain curve was obtained and the modulus estimated.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115077544","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}
引用次数: 10
Exploring silica powder and its effect on a flip chip underfill encapsulant 探索硅粉及其对倒装芯片底填料的影响
P. Klimah, J. Liu
{"title":"Exploring silica powder and its effect on a flip chip underfill encapsulant","authors":"P. Klimah, J. Liu","doi":"10.1109/ISAPM.1998.664426","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664426","url":null,"abstract":"Certain properties of silica powder can influence flip chip production, especially in the process of encapsulation and set-up time. Our study of the silica used in encapsulants shows that the particle distribution of the silica has a direct relationship with the viscosity of the encapsulant, which contains the silica. We also found that the analysts for the ranges of particle distribution serves as an excellent tool for relating the particle size with its viscosity.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124194660","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}
引用次数: 1
Characterization and processing of low dielectric constant thick film substrates for electronic packaging applications 电子封装用低介电常数厚膜基板的表征与加工
D. Kellerman, L. Retherford, D. J. Nabatian, P. Bokalo, Fengmei He, F. Barlow, A. Elshabini
{"title":"Characterization and processing of low dielectric constant thick film substrates for electronic packaging applications","authors":"D. Kellerman, L. Retherford, D. J. Nabatian, P. Bokalo, Fengmei He, F. Barlow, A. Elshabini","doi":"10.1109/ISAPM.1998.664448","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664448","url":null,"abstract":"The application of the new microsphere Low K thick film material to large MCM-C substrates is discussed in this paper. Processing of large ceramic boards approximately 6.5/spl times/8.5 inches square with 4 metal layers is described. Both screen printed and etched silver and gold metallizations are used for this work. Electrical, physical, and materials characterization of both silver and gold compatible multilayer Low K dielectric material is detailed. High frequency characterization of the material is also discussed, over a wideband frequency bandwidth between 1-12 GHz.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125033552","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}
引用次数: 1
Immersion cooling of high heat flux microelectronics with dielectric liquids 高热流密度微电子介质液体的浸没冷却
M. Arik, A. Bar-Cohen
{"title":"Immersion cooling of high heat flux microelectronics with dielectric liquids","authors":"M. Arik, A. Bar-Cohen","doi":"10.1109/ISAPM.1998.664464","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664464","url":null,"abstract":"This paper explores the use of direct liquid cooling, by immersion of the components in inert, non-toxic, high dielectric strength perfluorocarbon liquids. Boiling heat transfer with the candidate liquids provides heat transfer coefficients that are as much as two orders of magnitude higher than achievable with forced convection of air. Unfortunately, the highly effective nucleate boiling domain terminates at the so-called Critical Heat Flux, approximately in the range of 20 W/cm/sup 2/ at atmospheric conditions and saturation temperature. Consequently, if immersion cooling is to be used for next generation chips, ways must be found to increase the pool boiling CHF of these dielectric liquids. Use of a pool boiling CHF correlation, developed in this laboratory, points to the possibility of reaching a CHF of nearly 60 W/cm/sup 2/, using elevated pressure and subcooling, along with a dilute mixture of a high boiling point fluorocarbon, and applying a microporous coating to the surface of the chip.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125916662","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}
引用次数: 22
Thermoplastic adhesives for microwave assembly component mounting 微波组件安装用热塑性胶粘剂
K. Ouellette, K. G. Ressler
{"title":"Thermoplastic adhesives for microwave assembly component mounting","authors":"K. Ouellette, K. G. Ressler","doi":"10.1109/ISAPM.1998.664469","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664469","url":null,"abstract":"Silver-loaded epoxy is the conventional component attach material used in microwave hybrid assemblies. Conductive thermoplastic adhesives offer several significant advantages over epoxies for component attach including much shorter bond time and faster rework. The suitability of a silver-loaded thermoplastic adhesive for component attach is the focus of this paper. A design of experiments was conducted to identify processing conditions that maximize thermal conductivity, minimize electrical resistivity, and obtain adequate die shear strength. The loss of a transmission line on a Teflon based circuit board mounted with the thermoplastic adhesive was measured before and after temperature cycling. The thermoplastic adhesive was shown to be a promising candidate for component and circuit attach.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114459626","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}
引用次数: 0
Advances in flip chip underfill material cure rates and reliability 倒装衬底材料固化率及可靠性研究进展
D. Shi, K. McKeen, B. Jenson
{"title":"Advances in flip chip underfill material cure rates and reliability","authors":"D. Shi, K. McKeen, B. Jenson","doi":"10.1109/ISAPM.1998.664429","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664429","url":null,"abstract":"This paper will focus on significant advances in improving flip chip underfill material cure rates under conventional cure mechanism and in improving the material's reliability, which significantly improves semiconductor packaging productivity. The material's cure rates as a function of time and temperature will be examined and presented by data generated by differential scanning calorimetry (DSC). DSC will also be used to examine the glass transition temperature of the optimum cure time and cure temperature. The material's linear coefficient of thermal expansion will be examined by thermomechanical analyzer (TMA). Other material physical properties such as shear strength and moisture absorption rate will be examined and presented. The reliability data from liquid-liquid thermal shock tests on actual flip chip devices using such material and optimum cure schedule will also be presented.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114143878","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}
引用次数: 4
High frequency electrical characterization of electronic packaging materials: environmental and process considerations 电子封装材料的高频电气特性:环境和工艺考虑
D. Amey, S. Horowitz, R. Keusseyan
{"title":"High frequency electrical characterization of electronic packaging materials: environmental and process considerations","authors":"D. Amey, S. Horowitz, R. Keusseyan","doi":"10.1109/ISAPM.1998.664446","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664446","url":null,"abstract":"Recognizing the need for improved materials data to meet the needs of designers of RF and microwave products, DuPont Photopolymers and Electronic Materials (P&EM) has had an ongoing program to generate high frequency data on materials properties (dielectric constant, loss tangent and attenuation). Characterization of ceramic and printed wiring advanced interconnection materials in the 1 to 20 GHz range has been performed for a variety of new Thick Film and Low Temperature Cofired Ceramic (LTCC) dielectrics. Gold and silver conductors applied by both screen printing and photopatterning on these dielectrics as well as on 96% alumina have been tested. These have been benchmarked against Thin Film conductors and copper clad FR-4, Polyimide, BT and Teflon/sup (R)/ printed wiring materials. The performance of many of these systems has been reported for room temperature and humidity conditions. This presentation builds on the previous work with data on the high frequency properties of some of the advanced ceramic and printed wiring materials systems when exposed to 85/spl deg/C temperature and 85% relative humidity. In addition the high frequency performance of a new gold conductor system with both screen printed and photoetched patterning on 96% and 99% Alumina is described demonstrating the improved performance over gold Thin Film metallization typically used in Microwave applications.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115401799","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}
引用次数: 17
Wideband electrical characterization and modeling of plastic packaging materials 塑料包装材料的宽带电特性和建模
S. Riad, W. Su, I. Salama, A. Elshabini, M. Rachlin
{"title":"Wideband electrical characterization and modeling of plastic packaging materials","authors":"S. Riad, W. Su, I. Salama, A. Elshabini, M. Rachlin","doi":"10.1109/ISAPM.1998.664447","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664447","url":null,"abstract":"Summary form only given. The paper presents the efforts performed in the areas of package modeling, and package and material (molding compound) characterization at RF/microwave frequencies. At high frequencies, material properties and properties of signal lines/interconnects are equally important. As such, the presented efforts dealt with material (molding compound) characterization of lead frames and bond wire. While the microwave characterization of the molding compounds performed in this study over a wideband of frequencies can be utilized in a variety of the plastic package structures, the objective of the model development was to develop an electrical model of 16 lead SOIC plastic packages, that gained lately a great popularity for packaging wireless RFICs. The models developed and used will be discussed along with experimental results. In this work, discussion of the techniques validation, the accuracy, the repeatability, and the variability will be conducted. For dielectric materials, such as plastic molding compounds used in RF/microwave packages, their electrical properties can be described by their relative dielectric constant and loss tangent. To measure these properties at microwave frequencies, the two most commonly used techniques are the resonant technique and the transmission line technique. In this paper, both techniques are used to characterize the dielectric properties of the plastic molding compounds. Two measurements techniques, the HP coaxial probe and the stripline resonator were used to characterize the material properties. Several issues related to these techniques will be described.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115678599","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}
引用次数: 1
Fundamental study on adhesive strength of electrical conductive adhesives (ECAs) 导电胶粘剂(ECAs)粘接强度的基础研究
T. Inada, C. Wong
{"title":"Fundamental study on adhesive strength of electrical conductive adhesives (ECAs)","authors":"T. Inada, C. Wong","doi":"10.1109/ISAPM.1998.664468","DOIUrl":"https://doi.org/10.1109/ISAPM.1998.664468","url":null,"abstract":"Electrical conductive adhesives (ECAs) are perceived as the next generation interconnection materials, for printed wiring boards (PWBs) and electronic packaging. Poor adhesive strength and weakness in impact resistance obstructs the wide application of the ECAs. For this reason, fundamental studies for ECAs are needed. In this paper, relationships between the orientation of silver flakes in epoxy ECAs and the adhesive strength were investigated. Two kinds of processes to randomize the orientation of silver flakes were proposed. The randomization of silver flakes orientation was found to be effective in improving the adhesive strength. Novel non-Au/Pd sputtering SEM technique was proposed. By this technique, the conductive path of ECAs was easily identified. The edges of the silver flakes and small particles in the ECAs were found to be very effective in electrical contact that illustrated the non-Au/Pd sputtering SEM study.","PeriodicalId":354229,"journal":{"name":"Proceedings. 4th International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces (Cat. No.98EX153)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115073566","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}
引用次数: 7
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