{"title":"Numerical modelling for electronic packaging - future requirements","authors":"C. Bailey","doi":"10.1109/ICEPT.2005.1564645","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564645","url":null,"abstract":"The fabrication, assembly and testing of electronic packaging can involve complex interactions between physical phenomena such as temperature, fluid flow, electromagnetics, and stress. Numerical modelling and optimisation tools are key computer-aided-engineering technologies that aid design engineers. This paper discusses these technologies and there future developments.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126472459","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":"Fabrication and properties of SiC/Cu composites for electronic packaging","authors":"Dezhi Zhu, Gaohui Wu, Guo-qin Chen, Qiang Zhang","doi":"10.1109/ICEPT.2005.1564679","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564679","url":null,"abstract":"The 55vol.% SiC/sub p//Cu composites with different particle sizes were fabricated by squeeze casting technology for electronic packaging applications, also with the effect of particle size and annealing treatment on their thermo-physical and mechanical properties are discussed. The microstructure observation showed the composites were dense and uniform as well as void free. The CTEs of SiC/sub p//Cu composites decreased with the reducing of SiC particle sizes, and it could be further reduced by annealing treatment. As the particle size increased, the thermal conductivities of SiC/sub p//Cu composites increased, which was similar to that after annealing. The SiC/sub p//Cu composites exhibited high bending strength and elastic modulus at ambient temperature. After annealing, the bending strength of composites decreased slightly, and the elastic modulus kept unchanged.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134097228","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}
Liu Lin-tao, Yu Ming-yan, Ye Yi-zheng, W. Jin-xiang
{"title":"Design and simulation of SIP for RF system","authors":"Liu Lin-tao, Yu Ming-yan, Ye Yi-zheng, W. Jin-xiang","doi":"10.1109/ICEPT.2005.1564640","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564640","url":null,"abstract":"With the scaling of CMOS, the system-on-chip (SOC) has become a viable option for RF system. The absence of high Q inductors for CMOS RF has led to an appearance of RF system-in-package. In this paper, we analyze the merit of the package for CMOS RF IC and review development of the package. We focus on LTCC technology and simulate a high performance mixer using stacked spiral inductor.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131733241","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":"Molecular dynamics (MD) simulation of uniaxial tension of /spl beta/-Sn single crystals with nanocracks","authors":"Weiqiang Wang, Ying Ding, Chunqing Wang","doi":"10.1109/ICEPT.2005.1564654","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564654","url":null,"abstract":"Single crystals of /spl beta/-Sn with artificial nanocracks were simulated with molecular dynamics (MD) method. A pairwise sum of Morse potentials was used to describe the interatomic interactions between Sn atoms in the single crystal of pure /spl beta/-Sn. Uniaxial tensile force was applied along two different directions, [010] and [001], respectively for different simulated specimens. It was found that when the applied tensile force was along the [001] direction, more dislocations were emitted from the crack tip than when the applied tensile force was along the [010] direction. Polygonization was observed, when the applied force along the [001] direction was removed from the simulated specimen. This was similar to polygonization observed in in-situ tensile test conducted in transmission electron microscope (TEM).","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131179374","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":"The influence of element-Ni on interfacial reactions between lead-free Sn-Ag-Cu and Cu substrate","authors":"Lifeng Wang, F. Sun, Ying Liang, Miaosen Yang","doi":"10.1109/ICEPT.2005.1564682","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564682","url":null,"abstract":"The formation and growth of intermetallic compounds (IMC) is a key factor to the reliability of soldering joints in modern electronic mounting and packaging industry. In this work, Sn-3.8Ag-0.5Cu, Sn-3.8Ag-0.5Cu-0.1Ni lead-free solders were prepared using vacuum equipment. The influence of element-Ni on interfacial reactions between Sn-3.8Ag-0.5Cu and Cu during soldering as well as on IMCs behavior during aging was studied. When soldered, the Sn-3.8Ag-0.5Cu-0.1Ni/Cu IMC layer was much thicker than that of Sn-3.8Ag-0.5Cu/Cu; by calculating the metastable phase equilibria and comparing the driving forces of formation of individual IMC, the compounds sequence and reaction path at solder/copper interface were predicted through Thermo Calc software which is based upon CALPHAD method. The results showed that the compound which formed first was Cu/sub 6/Sn/sub 5/, then Cu/sub 3/Sn. The microstructure of the joint was also identified by means of Olympus, scanning electron microscope (SEM) and energy dispersive X-ray (EDX) analysis methods, the addition of Ni made IMC of SnAgCu/Cu turn into (Cu, Ni)/sub 6/Sn/sub 5/. The results from thermodynamic calculation are in good agreement with the experiments. When 130/spl deg/C aged, the total IMC layer of SnAgCu/Cu solder joint thickened with the increasing of aging time. The thickness of IMC layer has straight-line relation to square root of time, which accords with the rule of parabola; while (Cu,Ni)/sub 6/Sn/sub 5/ layer of the SnAgCu-0.1Ni/Cu solder joint appear greater stabilities during aging.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115602583","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":"Effect of unfilled underfill on drop test and thermal cycle reliability","authors":"E. Ibe, K. Loh, J. Luan, T. Y. Tee","doi":"10.1109/ICEPT.2005.1564728","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564728","url":null,"abstract":"The work reported here explores the effect of underfill encapsulants on drop test and thermal cycle reliability of area array packages, such as BGA's, CSP's, and WL-CSP's. An unfilled underfill was found to provide superior drop test performance. Silica filled underfill was found to provide superior thermal cycle performance. However, if the unfilled underfill provides adequate thermal cycle performance, its use yields substantial process benefits.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124251300","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}
Fuhong Huang, Yu-bing Gong, Quanyong Li, Daoguo Yang
{"title":"The application of RSM in optimization of the curing profile for electronic packaging polymers","authors":"Fuhong Huang, Yu-bing Gong, Quanyong Li, Daoguo Yang","doi":"10.1109/ICEPT.2005.1564638","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564638","url":null,"abstract":"Process-induced warpage is a major concern for the electronic packages. In this paper, a combined methodology of numerical simulation and optimization algorithm is developed to predict the warpage caused by the curing process of the thermosetting polymer and the subsequent cooling down phase and minimize the warpage. A plane strain FEM model is established to simulate the thermal-mechanical characters of flip chip package. Anand mode and Maxwell mode are adopted to describe the time and temperature dependent material properties for eutectic solder joints and epoxy underfill, respectively. Based on the simulation result, response surface method (RSM) and constrained variable metric method(CVM) are employed to find optimal curing profile for underfill in flip chip packaging. The simulation results show that package warpage can be effectively reduced by choosing optimal curing profile.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124275623","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":"Study on Angle Deviation for Coupling Loss in Fiber Collimator Packaging","authors":"Qiu Jianxin, He Feng","doi":"10.1109/ICEPT.2005.1564630","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564630","url":null,"abstract":"Angle deviation of optical components in fiber collimator packaging is theoretically analyzed, and resolution expression of the relationship between angle deviation of components and coupling loss of collimator is deduced due to transmission equation of GRIN (gradient index lens). Then the economical tolerance of collimator assembly, which provides the theoretical foundation to establish MOEMS mathematic model of packing collimator and realize industrialized production, is confirmed","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130933859","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":"Interfacial reactions between Pb-free solders and metallized substrate surfaces","authors":"Dezhi Li, Changqing Liu, P. Conway","doi":"10.1109/ICEPT.2005.1564636","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564636","url":null,"abstract":"The interfacial reactions and the resultant intermetallics between lead free solders, i.e., Sn-3.8Ag-0.7Cu, Sn-3.5Ag and Sn-0.7Cu, and substrates with different metallisation, namely, Cu, electroless Ni (EN), immersion Ag on Cu (CuImAg) and electroless Ni immersion gold (ENIG), were investigated after multiple reflows and subsequent ageing. For Cu and CuImAg substrates, the intermetallic compounds (IMCs) Cu/sub 3/Sn and Cu/sub 6/Sn/sub 5/ formed at the interface were identified, compared to Ni/sub 3/Sn/sub 4/ IMC in the case of EN or ENIG substrates reacting with Sn-3.5Ag. However, for EN or ENIG substrates, when using Sn-3.8Ag-0.7Cu and Sn-0.7Cu solders, the IMCs formed at the interface was (Cu,Ni) /sub 6/Sn/sub 5/. It has been revealed that the growth of Cu/sub 6/Sn/sub 5/ was faster than that of (Cu,Ni) /sub 6/Sn/sub 5/ and Ni/sub 3/Sn/sub 4/, which indicates the introduction of Ni into the Cu/sub 6/Sn/sub 5/ IMC may provide an optimised solution to enable the stability of the interfaces formed during soldering. As for the morphology of the IMCs, when they formed at the interface, the (Cu,Ni) /sub 6/Sn/sub 5/ IMCs were needle- or facet-like, the Cu/sub 6/Sn/sub 5/ and Ni/sub 3/Sn/sub 4/ IMCs were facet-like and Ag/sub 3/Sn IMCs were plate- or pebble- or needle-like. In the solder, the Cu/sub 6/Sn/sub 5/ IMC had prism-like shape with some of them appearing hollow with the Ag/sub 3/Sn IMCs embedded inside. Kirkendall voids were found in the Cu/sub 3/Sn and Ni/sub 3/P layers, and the formation of Kirkendall voids in the Cu/sub 3/Sn layer is likely related to the immersion Ag surface finish.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126893833","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":"Characterization of copper-to-silicon diffusion for the application of 3D packaging with through silicon vias","authors":"S. Zhang, S. Lee, L. Weng, S. So","doi":"10.1109/ICEPT.2005.1564666","DOIUrl":"https://doi.org/10.1109/ICEPT.2005.1564666","url":null,"abstract":"Through silicon vias (TSVs) are one of the major enabling technologies for three-dimensional packaging (3DP). TSVs are usually plugged with plated copper for interconnection. However, the introduction of massive copper in the chip may cause device failure due to the fast diffusion of copper into silicon. In order to reduce this risk, a diffusion barrier layer should be deposited on the sidewall of TSVs between the plated copper and the bulk silicon. In addition, an insulation layer should be deposited as well to prevent short circuit. In this paper, the phenomenon of copper-to-silicon diffusion is characterized. The selected interfacial multilayer structure is Cu/Ti/SiO/sub 2/. Although the ideal specimens should be TSVs with interfacial multilayer deposited on the side wall, it is rather difficult to perform surface analysis on a very small area. Therefore, planar analysis with interfacial multilayer deposited on the top surface of a silicon wafer is performed instead. For comparison purpose, additional cases without insulation layer and/or barrier layer are also investigated. A set of experiments is designed to study the effects of surface roughness and layer thickness. In addition, some samples are subject to high temperature storage for the study of thermal annealing effect.","PeriodicalId":234537,"journal":{"name":"2005 6th International Conference on Electronic Packaging Technology","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123162407","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}