Copper strip surface roughness
The surface quality of LZ what you say is very poor, should be the surface of skin, layered, needle, roller printing, color and other defects, the surface roughness has little relation with.
This effect is not too big, too high roughness may cause heat treatment after adhesion phenomena is too low then influence the use performance - coating, electroplating, general 0.2-0.4 can, if you want to avoid the needle, small pits, contusion and other defects.
The surface roughness of copper strip is controlled by roll roughness, and the general roll is controlled at 0.2-0.4 mu m. After rolling, the surface RA of copper strip will be somewhat lower.
