Title: Dissolution of metals utilizing tungsten-diol complexes 2
Application Number: 85101736 Application Date: 1985.04.01
Publication Number: 1008102 Publication Date: 1987.01.31
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C23F1/18,H05K3/06
Applicant(s) Name: Plastic Specialties Address:
Inventor(s) Name:
Attorney & Agent: LUO CAIXI
Abstract:
     A solution containing H2SO4, H2O2 and catalytic amount of tungsten-diol complex is used to accelerate the rate of dissolving metals. This invention relates to the dissolution of metal in aqueous etching solution containing H2SO4-H2O2, and especially relates to the recipes of a novel etching solution with high dissolving ability to metals. This method is mainly applied on the etching of copper in the production of printed circuit board.
Time: 6