FAILURE AND FEM ANALYSIS OF INDIUM SOLDER-BUMPS OF HgCdTe DETECTORS
投稿时间:2009-01-12  修订日期:2009-01-12  download
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吴礼刚 宁波大学信息科学与工程学院 wg21c@sina.com 
Abstract:During satellite’s working, HgCdTe mid or long wavelength infrared (IR) detectors by the Stirling cooler are subjected to thousands of repeated thermal cycles from below -173℃ to room temperature. Due to the mismatch of coefficients of thermal expansion (CTE) of different materials, thermal cycles can cause the bonding’s fatigue and failure,even bring on the disfunction of satellites. Through the thermal cycle equipment (TCE-a) developed by SITP which simulated the vaccum environment and Stirling cooler’s intermittent working modes, we discovered two failure modes of Indium solder-bumps. And the finite elements method (FEM) is used to analyze the mechanism of bumps’ failure.
keywords:IR detector  Indium solder-bump  thermal cycle  failure  FEM
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Copyright:《Journal of Infrared And Millimeter Waves》