Protective coating having adhesion improving characteristics

Details Protective coating having adhesion improving characteristics Protective coating having adhesion improving characteristics

1992-05-26

1994-04-05

Kastler, Scott

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148253, C25D 706

Patent

active

053001583

ABSTRACT:
There is provided a method of treating a copper or copper alloy substrate to provide improved resistance to both oxidation and to chemical attack. The substrate is immersed in an aqueous solution containing both chromium (VI) ion and phosphate ions. The treatment is particularly effective for protecting imaged printed circuit boards during storage, handling and use.

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