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Printed Circuit Board
Printed Circuit Board (PCB) is the core interconnection substrate for electronic products, widely used in communications, consumer electronics, automotive electronics and industrial control. It requires stable surface roughness and clean panel surface to guarantee circuit yield.
The brushing and grinding process runs throughout PCB manufacturing—post-drilling deburring, dry-film pre-treatment, solder-mask pre-treatment, gold-finger polishing, ENIG pre-treatment, and post-lamination desmear—each step directly affecting final yield and reliability.
Lean Abrasives's PCB-specific abrasive brush rollers cover two major series—nylon filament brush rollers and non-woven brush rollers—offering flexible matching of silicon carbide or alumina abrasive grit sizes based on line width/space and copper thickness.
Nylon filament brush rollers offer moderate cutting action and long service life, ideal for post-drilling deburring and surface cleaning on standard boards with line width/space ≥8 mil and copper thickness ≥35 μm.
Non-woven brush rollers deliver fine, uniform grinding that produces a consistent, delicate copper surface roughness, significantly improving photoresist and solder-mask adhesion—especially suited for advanced HDI and packaging substrates with line width/space ≤4 mil and copper thickness ≤35 μm.
Our ceramic brush rollers provide aggressive cutting action for post-lamination oxide-layer removal, blind/buried via desmear, and resin cleaning of stainless-steel lamination plates, ensuring flat via openings and a dent-free panel surface.We also provide matching precision sanding belts for local trimming and repair of circuit boards.
