Measuring and testing – Testing of apparatus
Patent
1996-10-18
1998-03-03
Williams, Hezron E.
Measuring and testing
Testing of apparatus
29829, 29830, 73801, 73587, G01N 1900
Patent
active
057237980
ABSTRACT:
A panel of several circuit boards connected by bridges is separated into individual boards by opposed dies which sever the link. Shock from the die impact can damage fragile components mounted on the circuit boards, especially when dies become dull and the singulation machine needs to be serviced. Periodic measurements of die acceleration and panel acceleration are made during a die wear cycle to obtain an empirical function of the correlation of those parameters. A threshold of acceptable panel acceleration is established and the related limit of die acceleration is determined from the correlation function. Die acceleration is then monitored during a production run to predict when machine servicing is needed.
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patent: 4791721 (1988-12-01), Anderson et al.
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patent: 5184517 (1993-02-01), Kelzer
Bellus David Paul
Cole Michael Paul
Ashraf Nashmiya
Delco Electronics Corporation
Funke Jimmy L.
Williams Hezron E.
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