1.CW-21 is a non-toxic, harmless, polishing effect copper and its alloy chemical polishing solution.2. The acid etching system using hydrogen peroxide is formed without nitrogen oxides and other toxic gases, and has less etching property than triacid system and chromic acid system, reducin…

1.CW-14 copper polishing additive is compounded by corrosion inhibitor, nitrogen oxide gas absorbent and surfactant2. The effect is moderate, the substrate is weakly etched, the operating environment is good, and the process meets the requirements of clean production.