METHOD FOR DEPOSITING A METAL ON A SURFACE

摘要

UNITED STATES PATENT APPLICATION OF: YU-LING TENG RICHARD MAYERNIK FOR: IMPROVED METHOD FOR DEPOSITING A METAL ON A SURFACE An improved method for making conductive metal patterns involving the steps of treating a substrate with a solution comprising a reducible salt of a non-noble metal and a light radiation sensitive reducing compound, exposing said substrate to light radiant energy, fixing with a solution comprised of a complexing agent followed by electroless deposition, the improvement comprising extending the bath life o said fixing solution by maintaining the concentration of the light sensitive reducing compound on the fixing solution so that it does not exceed 0.4 m moles/liter.