Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Coating predominantly nonmetal substrate
Reexamination Certificate
2007-05-31
2010-10-19
Wong, Edna (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Coating predominantly nonmetal substrate
C205S164000, C205S210000
Reexamination Certificate
active
07815785
ABSTRACT:
The present invention relates to an improved method for the direct metallization of non-conductive substrate surfaces, in particular polyimide surfaces, that is characterized by the process steps of etching the substrate surface with an acidic etching solution that contains peroxide; contacting the etched substrate surface with an acidic treatment solution that contains permanganate; activating the treated substrate surface in an acidic activation solution that contains peroxide; contacting the activated substrate surface with an acidic catalytic solution that contains at least a thiophene derivate and at least a sulfonic acid derivate; metallization of the thus treated substrate surface in an acidic galvanic metallization bath.
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Hupe Jürgen
Kronenberg Walter
Enthone Inc.
Senniger Powers LLP
Wong Edna
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