Brown Oxide serves as follows: During micro etch on copper surface, corrosion inhibitor will be selectively formed on copper surface to form an uniform honeycomb microstructure on copper surface, thus to increase specific surface area and ensure good bonding force between copper surface and resin after lamination. The brownish red copper surface and uniform honeycomb structure formed upon braunification facilitate laser energy absorption, and can be applied to treatment before laser drilling.
Advantage introduction:光华科技微信公众号