- Plated-Through-Hole (PTH)Line
- Process flow: Deburring → alkaline degreasing → secondary or tertiary countercurrent rinsing → roughening (micro erosion) → secondary countercurrent rinsing → pre leaching → activation → secondary countercurrent rinsing → degumming → secondary countercurrent rinsing → PTH → secondary countercurrent rinsing → pickling
- Plated through hole is also called electroless plating coppert. And plated through hole is an autocatalytic oxidation-reduction reactions, depositing on the non-conductive substrate, PTH plays a role in bonding between the layers in double-sided board and multilayer board.