Test flow assurance using memory imprinting

Details Test flow assurance using memory imprinting Test flow assurance using memory imprinting

1994-09-27

1996-07-23

Bollinger, David H.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Condition responsive means controls separating means

209573, B07C 5344

Patent

active

055381413

ABSTRACT:
The present invention provides test flow assurance using memory imprinting. The device being tested includes a nonvolatile memory portion for storing an information imprint in a present test status field. The imprint indicates the bin category to which the device is to be directed according to the results of a test sequence. During the start of a test in the test flow, the present test status field is read to determine whether the device has already passed through the present test. If so, the device is not retested according to that test step, and it is binned out according to the imprinted information. If the imprint indicates that the device has not already passed through the present test, then the present test sequence is performed, the device programmed with its imprint, and binned out accordingly. If, during the present test sequence, the imprint indicates that the device did not pass through a previous test sequence as it should have, then the device is binned out as a failure because it was not properly processed. Alternatively, the device may be binned out as requiring testing according to the prior tests that the part has not undergone.

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patent: 4584764 (1986-04-01), Gussman
patent: 4588092 (1986-05-01), Moechnig et al.
patent: 4715501 (1987-12-01), Sato et al.
patent: 4871963 (1989-10-01), Cozzi

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