Use of C-SAM acoustical microscopy in package evaluations and failure analysis |
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Authors: | S Atkins L Teems W Rowe P Selby R Vaughters |
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Institution: | aHarris Semiconductor, P.O. Box 883, M/S 58-098, Melbourne, Florida 32901, USA |
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Abstract: | Acoustical microscopy is gaining wide acceptance in the microelectronic packaging community. C-mode scanning acoustical microscopy, C-SAM, is widely used in package evaluations and for failure analysis. This paper discusses several specific topics. These include: (1) popcorn cracking in SMDs; (2) an evaluation of solder die attach in power packages; (3) an instance of top of die delamination which resulted in electrical failures; and (4) moisture sensitivity of other surface mount power packages and how it resulted in ball bond degradation during a new product qualification. |
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Keywords: | Electronics packaging Surface mount technology Failure analysis Moisture Delamination Microscopic examination C-mode scanning acoustical microscopy (C-SAM) |
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