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Method and apparatus for identifying integrated circuits

  • US 5,984,190 A
  • Filed: 05/15/1997
  • Issued: 11/16/1999
  • Est. Priority Date: 05/15/1997
  • Status: Expired due to Term
First Claim
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1. A method of identifying a plurality of substantially identical integrated circuits formed on a common substrate, comprising the steps of:

  • programming each of the integrated circuits with respective electronic identification information distinguishing the integrated circuits from one another; and

    marking each of the integrated circuits with respective optical identification code which corresponds with the respective electronic identification information;

    reading the optical identification code on each of the integrated circuits; and

    accessing a lookup table to associate the optical identification code on each of the integrated circuits with the corresponding electronic identification information.

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