Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 30, 2010
Patent Application Number
11980432
Date Filed
October 31, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A system for making small modifications to the pattern in standard processed semiconductor devices. The modifications are made to create a small variable part of the pattern against a large constant part of the same pattern. In a preferred embodiment the exposure of the variable and constant parts are done with the same wavelength in the same combined stepper and code-writer. The invention devices a way of writing variable parts of the chip that is automatic, inexpensive and risk-free. A system for automatic design and production of die-unique patterns is also shown.
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