PWM Series – PCB Wet-Chemical R2R Desmear

Roll-to-Roll (2R) desmear machines of the PWM Series completely remove smear in the holes resulting from drilling and roughening. Our desmear equipment comprises following process steps: winding and unwinding, swelling, rinsing, desmear, pre-neutralizing and neutralizing, as well as drying. The PWM Series is well combinable with plating through-hole processes.


  • Very good process results for through-holes and blind holes
  • Excellent Mn6+ activation
  • No dirt or residual chemicals after wet-cleaning
  • High conveying stability with deviation of only ± 10 mm (with width control device)
  • Equipped with automatic control system to guarantee stable process parameters
  • Single-track or double-track conveyor can be selected according to production capacity and process requirements


  • Modularized design: tension or dancer rollers can be selected according to the process requirements to prevent deforming
  • Robust body structure to maintain parallel position of rollers during long-term operation
  • Superior Edge Position Control (EPC) to ensure even and straight rolling
  • Excellent design of residue filter unit to minimize film residue leftover
  • Sloped-bottom and small-volume tanks for rinsing processes to improve tank turnover rate by 50 %


Specifications of substrates:

Panel width:

250 - 600 mm (can be customized for different sizes)

Panel thickness:

12.5 μm - 25 μm or thicker.

Dia. of through-hole:

min. 0.1 mm A/R 10:1

Dia. of blind hole:

min. 0.075 mm A/R 1:1

R2R performance:

Normal operating time (uptime):

≥ 95 %

Mean repair time (MTTR):

4 h

EPC permissible edge alignment:

± 0.5 mm

Low-tension control:

5 N - 30 N

Additional data available on request.

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