Patent ID: 6231619
Filing Date: 2001-05-15
Classification: C25D,H05K

Abstract:
A process for depositing metal on a planar substrate having openings passing through the full thickness of the substrate, said process comprising the steps of providing a dispersion of carbonaceous particles in an aqueous medium within a treatment container, contacting said substrate with said dispersion to form a coating of said dispersion over surfaces of said substrate, compacting and partially drying the coating of the carbonaceous particles while removing entrapped water, air bubbles and particles from within the openings passing through the substrate by passing the substrate between a pair of opposed resilient circular rollers spaced apart from each other so as to deform as the substrate passes between the rollers and to remove said entrapped water, air bubbles and particles from within the openings by suction, completing the drying of the carbonaceous coating, and plating metal on those portions of said substrate coated with said carbonaceous coating from an electrolytic metal plating solution.