Structure and method for enhancing adhesion to a polyimide surfa

Details Structure and method for enhancing adhesion to a polyimide surfa Structure and method for enhancing adhesion to a polyimide surfa

1991-01-22

1992-09-29

Lusignan, Michael

Coating processes

Coating by vapor, gas, or smoke

Metal coating

427304, 427305, 427306, 427316, 427322, 2041921, B05D 310, C23C 1400, C23C 1402

Patent

active

051513048

ABSTRACT:
The surface of a substrate made of substantially crystalline polyimide is converted to form a layer of substantially amorphous polyimide. The substantially amorphous layer is formed by treating the crystalline polimide surface with a base followed by treatment with an acid to form a polyamic acid layer, which is reimidized to form a substantially amorphous layer by a low temperature heat cycle. Metals or polyimides can be deposited onto this amorphous layer, which is then cured to convert the amorphous layer to substantially crystalline polyimide. This process enhances the adhesion of the metal or polyimide layer without introducing contamination (new foreign materials or new functional groups) from surface treatments of adhesion layers.

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