PCB Membrane switch PCB circuits layer and Metal Domes combination process

Schematic diagram of the combination between pcb board and Metal domes layer of pcb membrane switches

Description:

pcb circuit layer

Metal domes layer

1) First tear off the layer of paper on the shrapnel layer

2) Then align the PCB board circuit layer, there must be no offset

3) If there are impurities or bubbles, scrape them off with a knife

4) If bubbles or other impurities appear on the circuit layer, they need to be scraped off with a knife