Tap pcb printed circuit board

Homemade Printed circuit board or PCB is one of the important things to assemble an electronic circuit. It provides support to the components and makes. ... Etched PCB. 9. After etching, thoroughly clean the copper clad using tap water. This will remove the dissolved copper from the copper laminate except the copper beneath the OHP pen markings. 10. Drill holes using appropriate drill bits. 11. Remove the OHP pen markings using Petrol or Thinner so that the tracks will ...