| abstract |
The present invention provides storage stability, is stable during electroless metal plating even in an alkaline electroless metal plating environment, is not easily oxidized, and is more corrosive than conventional Pd / Sn colloidal catalysts. Of an aqueous alkaline catalyst with low content. A metal clad comprising a dielectric, wherein a pyrazine derivative containing one or more electron donating groups on the ring represented by formula (I) is used as a catalytic metal complex forming agent in an aqueous alkaline environment. And an aqueous alkaline catalyst that is monomer-free and does not contain tin and antioxidants, catalyzing electroless metal plating by applying a reducing agent onto an unclad substrate. [R 1 to R 4 are each independently H; linear / branched (C 1 - 5) alkyl, -N (R) 2, a straight-chain / branched amino - alkyl (C 1 5), acetyl, linear / branched (C 1 ~ 5) alkoxy or straight-chain / branched hydroxy (C 1 - 5) alkyl; alkyl R is H or (C 1 ~ 5) (provided that one or more of R 1 to R 4 is other than H )] [Selection figure] None |