Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Mica flake
Patent
1986-01-09
1987-06-23
Buffalow, Edith
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Mica flake
428324, 428454, 428464, 428413, B32B 516
Patent
active
046752358
ABSTRACT:
Laminated synthetic mica articles are disclosed that have particular applicability as substrates in electronic components. The articles comprise a core of stacked and consolidated, synthetic mica sheets that are impregnated with resin, and a copper foil sealed to a face on the article. Adherence of the copper foil is enhanced by use of a micaceous facing layer and bonding sheet, both being resin-impregnated and the resin cure being advanced beyond the normal B-stage level before assembly. Insulation resistance is enhanced by providing an advanced resin coating on the copper foil before assembly. Use of a bismaleimide triazine and epoxy mixed resin is also disclosed whereby a transformation temperature (Tg) of about 200.degree. C. is obtained.
REFERENCES:
patent: 3026222 (1962-03-01), Rogers et al.
patent: 4456651 (1984-06-01), Pollmeier et al.
patent: 4456712 (1984-06-01), Christie et al.
patent: 4559264 (1985-12-01), Hoda et al.
Buffalow Edith
Corning Glass Works
Janes, Jr. C. S.
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