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Elaine Cheng
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Proceedings Papers
Volume Electrical Failure Analysis for Product-Specific Yield Enhancement
Available to Purchase
ISTFA2010, ISTFA 2010: Conference Proceedings from the 36th International Symposium for Testing and Failure Analysis, 38-48, November 14–18, 2010,
Abstract
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Yield on specific designs often falls far short of predicted yield, especially at new technology nodes. Product-specific yield ramp is particularly challenging because the defects are, by definition, specific to the design, and often require some degree of design knowledge to isolate the failure. Despite the wide variety of advanced electrical failure analysis (EFA) techniques available today, they are not routinely applied during yield ramp. EFA techniques typically require a significant amount of test pattern customization, fixturing modification, or design knowledge. Unless the problem is critical, there is usually not time to apply advanced EFA techniques during yield ramp, despite the potential of EFA to provide valuable defect insight. We present a volume-oriented workflow integrating a limited set of electrical failure analysis (EFA) techniques. We believe this workflow will provide significant benefit by improving defect localization and identification beyond what is available using test-based techniques.