Stereoselective synthesis of 1-substituted 2,6-dicyanopiperidines and transformation of 2,6-dialkylated products of 1-phenyl-2,6-dicyanopiperidine to .delta.-diketones and cyclohexenones
AQUEOUS COPPER PLATING BATHS AND A METHOD FOR DEPOSITION OF COPPER OR COPPER ALLOY ONTO A SUBSTRATE
申请人:Atotech Deutschland GmbH
公开号:US20180223442A1
公开(公告)日:2018-08-09
The present invention relates to bisurea derivatives and their use in aqueous plating baths for copper and copper alloy deposition in the manufacture of printed circuit boards, IC substrates, semiconducting and glass devices for electronic applications. The plating bath according to the present invention comprises at least one source of copper ions and a bisurea derivative. The plating bath is particularly useful for filling recessed structures with copper and build-up of pillar bump structures.
Stereoselective synthesis of 1-substituted 2,6-dicyanopiperidines and transformation of 2,6-dialkylated products of 1-phenyl-2,6-dicyanopiperidine to .delta.-diketones and cyclohexenones