The grinding brush rollers used in PCB manufacturing process can be divided into two categories according to their functions, namely, grinding brush roller and cleaning brush roller, and nylon needle brush roller, non-woven cloth brush roller and ceramic brush roller according to the materials used. They have their own characteristics in use.
Nylon needle brush roller is divided into silicon carbide (SiC) abrasive class, alumina (AO) abrasive class and pure nylon class according to the nylon needle brush wire containing different abrasive class, non-woven brush roller is divided into silicon carbide, alumina and pure non-woven class according to the non-woven cloth containing different abrasive class. The nylon needle brush roller is characterized by long service life and moderate grinding effect. It is especially suitable for surface treatment in PCB manufacturing process when the line width/line distance (L/S) is greater than or equal to 8mil and the copper foil thickness is greater than or equal to 35um. Nonwoven brush roller is characterized by fine grinding and uniform and meticulous surface roughness of copper foil, which can significantly improve the adhesion of photosensitive film and solder resistance film. It is especially suitable for PCB surface treatment with line width/line distance less than or equal to 4mil and copper foil less than or equal to 35um.
Both nylon needle brush and non-woven roller can be used for grinding before dry film and green oil process.according to my working experience, the application and configuration of brush roller in each process are summarized, and I would like to discuss the problem of grinding with friends who are concerned about this problem.
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