Adherent coating for copper
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United States of America Patent
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-
Sep 27, 1988
Grant Date -
N/A
app pub date -
Jan 14, 1987
filing date -
Jan 14, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A primer coating composition suitable for coating the inner layers of multilayer boards is disclosed. The cured coating is capable of maintaining adhesion without outgassing for at least 10 seconds at 250.degree. C. It can be adhesion promoted for adherent electroless metal deposition with a chromic acid adhesion promotion solution. The coating composition comprises the product of reacting between 20 to 60% of a poly(vinyl acetal) resin with 80 to 40% of a phenolic resin in the presence of an acidic catalyst and a coupling agent having at least two amino substituted aromatic groups covalently bonded to a titanium or zirconium central atom via an oxygen containing linkage.
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