Electronic coating compositions

Details Electronic coating compositions Electronic coating compositions

1994-11-07

1998-01-20

Dean, Karen A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524434, 524436, 524442, 524783, 524784, 524785, 524779, 524789, 524860, 524861, 524858, 524588, 501 88, 501 80, C08K 310, C04B 3800

Patent

active

057102031

ABSTRACT:
Disclosed are compositions which can be used to form tamper-proof coatings on electronic devices. These compositions contain a silica precursor resin and a filler which reacts in an oxidizing atmosphere to liberate heat. Such compositions form coatings which, when oxidized by techniques such as plasma etching, wet etching, or cross-sectioning, liberate heat which causes destruction of the underlying substrate and, thus, inhibits further examination.

REFERENCES:
patent: 3986997 (1976-10-01), Clark
patent: 4749631 (1988-06-01), Haluska et al.
patent: 4756977 (1988-07-01), Haluska et al.
patent: 4997698 (1991-03-01), Oboodi et al.
patent: 5063267 (1991-11-01), Hanneman et al.
patent: 5085893 (1992-02-01), Weiss et al.
patent: 5387480 (1995-02-01), Haluska et al.

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