Tamper-proof electronic coatings

Details Tamper-proof electronic coatings Tamper-proof electronic coatings

1997-06-19

1998-04-28

Marquis, Melvyn I.

Stock material or miscellaneous articles

Composite

Of silicon containing

4273761, 4273762, 501 87, 501 88, B32B 904

Patent

active

057442444

ABSTRACT:
Disclosed is a method of forming tamper-proof coatings on electronic devices. The method comprises applying a coating of a silica precursor resin and an inorganic salt onto the electronic device, wherein the inorganic salt is one which reacts with a wet etch to yield an acid or base that damages the electronic device. The coated electronic device is then heated at a temperature sufficient to convert the silica precursor resin to a silica containing ceramic matrix.

REFERENCES:
patent: 3986997 (1976-10-01), Clark
patent: 4448919 (1984-05-01), Murase
patent: 4749631 (1988-06-01), Haluska et al.
patent: 4756977 (1988-07-01), Haluska et al.
patent: 5399441 (1995-03-01), Bearinger et al.
patent: 5516596 (1996-05-01), Camilletti et al.
patent: 5548912 (1996-08-01), Camilletti et al.

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