Technology
PCB hole sealing
Cover the via with LPI solder mask Cover the via with LPI solder mask

The plated through-hole is covered by an LPI solder mask layer from one or both sides of the PCB. There are no other processes besides this, just cover/cover the through-hole with LPI solder mask during the printing of the solder mask layer.

advantage:

No additional fees required

Helps prevent solder leakage in SMT process

Helps prevent dust or liquids during use

Disadvantages:

The through-hole may not be fully covered/covered

Not suitable for through-hole plugs in BGA area

Limit via holes, preferably less than 0.3mm and maximum 0.5mm.

  • What are the common types of through-hole plugsWhat are the common types of through-hole plugs
  • Seal the through-hole with a solder mask layerSeal the through-hole with a solder mask layer
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  • Conductive hole plugConductive hole plug
  • Copper plated through-hole closureCopper plated through-hole closure
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