作者: C. Beddingfield , L.M. Higgins
DOI: 10.1109/3476.720416
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摘要: This paper discusses the nonproprietary aspects of work-in-progress regarding developments in flux materials to improve moisture-induced stress sensitivity flip chip plastic ball grid array devices. Studies addressing moisture characterization and preconditioning, using JEDEC Level 3, assemblies built with four proprietary fluxes two alternative underfill will be presented. report includes evaluation weight loss during a simulated die attach reflow profile for each type thermogravimetric analysis. Also, adhesion strength surface after assembly, preconditioning 48 h autoclave stressing discussed. The integrity solder joint corresponding measured pull techniques also effects experimental variables on die/substrate reviewed C-SAM imaging methods. Proprietary Motorola's FC-PBGA assembly technology not disclosed.