Process for producing a carrier tape

Details Process for producing a carrier tape Process for producing a carrier tape

1989-11-17

1991-01-08

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

174259, 174 522, 428901, H05K 302

Patent

active

049824953

ABSTRACT:
A process for producing a cheap carrier tape of a two layer structure having a superior heat resistance, difficultly susceptible of effect of impurities and having a superior flexibility is provided, which process comprising the following steps: coating a polyimide varnish onto a continuous, electrically-conductive metal foil and baking it; punching the resulting tape of a two layer structure of the metal foil and the polyimide film to form sprocket holes; cutting and removing the polyimide film to form a device hole; coating a resist onto the metal foil surface; light-exposing the resulting resist by the medium of a mask for separating a circuit pattern and a circuit from the sprocket parts; developing the resulting resist and etching the metal foil by the medium of a mask of the resist; removing the resist; and plating the metal foil.

REFERENCES:
patent: 2932689 (1976-01-01), Watanabe et al.
patent: 3711625 (1973-01-01), Dupuis
patent: 4353954 (1982-10-01), Yamaoka et al.
patent: 4562119 (1985-12-01), Darms et al.
patent: 4662973 (1987-05-01), Gotou et al.
patent: 4731287 (1988-03-01), Noda et al.
patent: 4839232 (1989-06-01), Morita et al.

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