Process for producing copy protection for an electronic circuit

Details Process for producing copy protection for an electronic circuit Process for producing copy protection for an electronic circuit

2003-04-15

2009-02-24

Coleman, W. David (Department: 2823)

Active solid-state devices (e.g., transistors, solid-state diode

Miscellaneous

C438S106000, C428S041700, C428S916000

Reexamination Certificate

active

07495348

ABSTRACT:
Processes for producing copy protection for an integrated circuit are provided. To avoid unauthorized copying of an integrated circuit, an effective and reliable copy protection are provided. The process includes the steps of providing a substrate that has semiconductor structures on at least a first side of the substrate, providing a material for coating the substrate, and coating the substrate with a copy-protect layer. In one embodiment, the copy-protect layer is produced by applying a silicate glass by evaporation coating. Thus, an etching process that dissolves the copy-protect layer also attacks the substrate so that the semiconductor structures are at least partially destroyed.

REFERENCES:
patent: 4374391 (1983-02-01), Camlibel et al.
patent: 5436084 (1995-07-01), Haluska et al.
patent: 5780163 (1998-07-01), Camilletti et al.
patent: 6268058 (2001-07-01), Tahon et al.
patent: 387175 (1965-05-01), None
patent: 1139424 (2001-10-01), None
patent: 1178529 (2002-02-01), None

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