Adhesion of metal coatings to polypyromellitimides

Details Adhesion of metal coatings to polypyromellitimides Adhesion of metal coatings to polypyromellitimides

C - Chemistry, Metallurgy

23

C

C23C 18/20 (2006.01) C23C 14/02 (2006.01) C23C 14/20 (2006.01) C23C 18/22 (2006.01) C23C 18/31 (2006.01) H05K 3/38 (2006.01)

Patent

CA 2101827

IMPROVING ADHESION OF METAL COATINGS TO POLYPYROMELLITIMIDES Abstract The adhesion of metal coatings, such as those produced by electroless or physical vapor deposition, on polypyromellitimide surfaces is improved by prior treat- ment of the surface with concentrated sulfuric acid, fol- lowed by aqueous alkali metal hydroxide of at least about 2M concentration. Further metal may be deposited on the surface, for example by electrolytic or physical vapor de- position, following the original metal deposition.

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