With progress of the time, plating treatment is required to provide excellent adhesion property and solderability for high density circuitry pattern and high reliablity mounting. Namely the role of plating has transited from rust-preventive and decorative plating to high function and high reliability plating.TAIYO gives 100% quality assurance to all users by its chemical treatment engineering know-how which is accumulated throughout many years and company wide quality control system.