Flexible, printed circuit

Details Flexible, printed circuit Flexible, printed circuit

1984-08-17

1985-12-31

Buffalow, Edith

Stock material or miscellaneous articles

Composite

Of metal

428450, 4284735, 428901, 528 26, 528 28, 528 38, 361398, 174 685, B32B 1508

Patent

active

045621195

ABSTRACT:
A flexible, printed circuit with excellent adhesion of the printed tracks, which is obtained by coating one side of a metal foil without an intermediate layer with a polymer consisting of a polyamide, polyimide or polyamide-imide containing siloxane groups, which is obtainable by crosslinking a silicon-modified polyamide prepolymer, polyamide-acid prepolymer or polyamide-amido-acid prepolymer of the formula I, heating the coated metal foil in the temperature range from 50.degree. to 300.degree. C. till a tack-free coating is obtained, exposing the opposite side of the coated metal foil, which side is provided with a photolacquer, through a photo mask, and developing the exposed metal foil.

REFERENCES:
patent: 3809591 (1974-05-01), Vogelfanger et al.
patent: 3894114 (1975-07-01), Lohmann
patent: 3948835 (1976-04-01), Gerber
patent: 4200724 (1980-04-01), Darms et al.
E. Behr, "Hochtemperatur-Bestandige Kunststoffe", Carl Hauser, Munich, 1969, p. 79.

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