Method of microetching a conductive polymer on multilayer circui

Details Method of microetching a conductive polymer on multilayer circui Method of microetching a conductive polymer on multilayer circui

1997-09-24

2000-03-14

Gorgos, Kathryn

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating selected area

205183, 205210, 205917, C25D 502, H05K 300

Patent

active

060368357

ABSTRACT:
A microetch composition for a circuit board containing sulfuric acid in combination with a carboxylic acid having 2 to 6 carbon atoms, wherein the volume of the carboxylic acid is preferably greater than the amount of sulfuric acid. The method discloses the contacting of a electrically conductive polymer with the microetch composition disclosed above to expose copper underlying the electrically conductive polymer.

REFERENCES:
patent: 3434889 (1969-03-01), Haroldson et al.
patent: 3537895 (1970-11-01), Lancy
patent: 3556883 (1971-01-01), Naito et al.
patent: 3702273 (1972-11-01), Johnston, II
patent: 5238550 (1993-08-01), Burress
patent: 5788830 (1998-08-01), Sakamoto et al.
Moenes. Elias, "Update on Peroxide/Sulfuric Acid Etching", Plating and Surface Finishing, pp. 70-73, Jul. 1984.

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