Patent ID: 6322656
Filing Date: 2001-11-27
Classification: C23C,H05K

Abstract:
A method of reducing a layer of solid copper oxide on a solid metallic copper layer to be bonded to a resin comprising the steps ofexposing the copper oxide layer to an aqueous reducing solution, the aqueous reducing solution comprisingan amine borane represented by the general formula BH.sub.3 NHRR', wherein the R and R' are each a member selected from the group consisting of H, CH.sub.3, and CH.sub.2 CH.sub.3, anda reducing stabilizer selected from the group consisting of thio-containing (--C(.dbd.S)NH.sub.2) compounds, triazole-containing (C.sub.2 H.sub.3 N.sub.3) compounds, isoxazole-containing (--C.sub.3 HNO) compounds, thiazole-containing (--NCS--) compounds, imidazole-containing compounds, and sulfone-containing (--SO.sub.3 H) compounds, the reducing stabilizer being present in an amount sufficient to decrease consumption of the amine borane during reduction to a level less than that consumed in the absence of the reducing stabilizer during the course of the copper oxide reducing process.