In house development that probably took over an year of online research and implementation of:
- Plating constant current DC power supply
- Copper plating solution, from scratch, with distilled water
- Hole surface preparation solution to remove smear during drilling
- Surface activation solution, from scratch, not using palladium based elements.
- Precision drilling drill press, currently been upgraded to a CNC drill
Few pics of accomplished plating:
Simple rock platted in copper.
PCB through hole cross cut.