Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [Homebrew_PCBs] Re: Cermark Laser marking for PCB resist?

From: Les Newell <les.newell@...>
Date: 2016-09-19

> 1. Clean PCB blank and spray with high temp black / dark paint.
> 2. Laser at low power / high speed to burn away paint around traces
> (isolation) or raster for removal of larger areas.
> 3. Etch.

I have tried this with a range of different paints and the problem I
have found is that the paint doesn't burn off cleanly which interferes
with the etchant. I haven't found a good way of removing the residue
without removing the paint as well.