Invention Grant
US07682842B2 Method of adaptively selecting chips for reducing in-line testing in a semiconductor manufacturing line
失效
自适应选择芯片以减少半导体生产线中的在线测试的方法
- Patent Title: Method of adaptively selecting chips for reducing in-line testing in a semiconductor manufacturing line
- Patent Title (中): 自适应选择芯片以减少半导体生产线中的在线测试的方法
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Application No.: US12129712Application Date: 2008-05-30
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Publication No.: US07682842B2Publication Date: 2010-03-23
- Inventor: Rao H. Desineni , Xu Ouyang , Hargurpreet Singh , Yunsheng Song , Stephen Wu
- Applicant: Rao H. Desineni , Xu Ouyang , Hargurpreet Singh , Yunsheng Song , Stephen Wu
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent H. Daniel Schnurmann
- Main IPC: H01L21/00
- IPC: H01L21/00

Abstract:
A method for identifying potentially defective integrated circuit chips and excluding them from future testing as wafers move through a manufacturing line The method includes data-collecting steps, tagging the chips on wafers identified as potentially bad chips based on information collected as the wafer moves down the fabrication line, evaluating test cost savings by eliminating any further tests on the tagged chips preferably using a test cost database. Considering all the future tests to be preformed, the tagged chips are skipped if it is determined that the test cost saving is significant. Tagging bad chips is based on various criteria and models which are dynamically adjusted by performing the wafer final test on samples of the tagged chips and feeding-back the final test results. The dynamic adaptive adjustment method preferably includes a feedback loop or iterative process to evaluate financial tradeoffs when assessing the profit of salvaging chips against the additional test costs.
Public/Granted literature
- US20090299679A1 Method of Adaptively Selecting Chips for Reducing In-line Testing in a Semiconductor Manufacturing Line Public/Granted day:2009-12-03
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