Patent ID: 6723385
Filing Date: 2004-04-20
Classification: C23C,C23F,H05K

Abstract:
A process to pretreat copper surfaces so that a tight bond can be subsequently formed between the copper surfaces and plastic substrates by contacting the copper surfaces with a first solution containing:a. Hydrogen peroxide, b. At least one acid, and c. At least one nitrogen-containing, five-member heterocyclic compound that does not contain sulfur, selenium or tellurium atoms in the heterocycle, characterzed in that: The copper surfaces are brought into contact with a second solution containing:d. At least one adhesion-promoting compound from the group, consisting of sulfinic acid, selenic acid, telluric acid, heterocyclic compounds that contain at least one sulfur, selenium and/or tellurium atom in the heterocycle, as well as sulfonium, selenonium and telluronium salts, where the sulfenium, selenonium and telluronuim salts are compounds of general formula A: where A=, Se or Te,R1, R2 and R3=alkyl, substituted alkyl, alkenyl, phenyl, substituted phenyl benzyl, cycloalkyl, substituted cycloalkyl, where R1, R2 and R3 are the same or different, and Xâˆ’=Anion of an inorganic or organic acid or hydroxide.