Circuit Design Part 6 : Drilling PCB board

Remove the coloured part that covered the cooper with Silicon Carbide Abrasive paper. Once it done proceed with drilling procedure.

 

Drilling with 0.8mm drill bits can be a bit tricky as it's easy to break the drill bits. Always hold the drill straight and do not bend it when the hole has started. Putting a soft block of wood under the PCB provides a good base to drill into.

1. Dry off the board and clean away the blue etch resist with brush. 
  2. Using a 0.8mm PCB drill bit drill out all of the component holes  
3. Some 1mm holes may need to be made for connectors, 3mm for corner fixings
4. Finally use a PCB rubber to clean the copper ready for soldering

So now PCB's finished and you can start soldering the components in. You should do this soon after you have cleaned the PCB (within 1 hour) as the copper soon oxidises and becomes hard to solder onto.