Electronic Device Industry

Uneven Coating on Electronic PCBs

Uneven coating is a problem in the process of applying coating material for moisture prevention or electrical insulation of PCBs. The PCBs are easily charged with static electricity in the transfer process, and the coating material is charged when it is sprayed from the nozzle.

Uneven Coating on Electronic PCBs

Conventional countermeasures


  • Condensation may occur.
  • Prevents foreign particles from being blown out.

Countermeasures with static eliminators (ionizers)

Ionized air eliminates static electricity from the PCB while they are being coated, improving the yield rate.

Countermeasures with static eliminators (ionizers)

Improvements and Effects
Words from the worksite

Reduced cost for addressing defective products

Disposal cost of defective lots: $5,000/year

Recall cost (transportation cost, on-site service travel cost, and cost of internal man-hours): $5,000/year

In addition, there are other resulting benefits of improved reliability.