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US 5,693,701 AGranted
Tamper-proof electronic coatings
AssigneeDow Corning Corporation
InventorsRobert Charles Camilletti, Loren Andrew Haluska, Keith Winton Michael
Life of this patent
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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.
Claims6
A coating composition comprising
- (a) a hydrogen silsesquioxane resin;
- (b) about 5 to less than about 90 weight percent of the coating of an inorganic salt, wherein the inorganic salt is one which reacts with a wet etch to yield an acid or base;
- and
- (c) a solvent.
1 more element
Dependencies are inferred from the claim text.