Homebrew PCBs

Is it possible to pre-drill some of the holes and align the artwork overlay against them?

Peter Harrison




On 26 Jan 2010, at 18:44, Stefan Trethan wrote:

> The problem with this is the non-zero width of the PCB. Depending on
> how you hold things together the films can shift one side relative to
> the other. A better method is to stick the films to PCB cutoff strips,
> or an L-shape. Insert a piece of clear acrylic or glass while aligning
> the two sides instead of the PCB. This gives very exact results,
> probably the best you can get without alignment pegs.
> 
> Vacuum holddown is highly recommended, it is easy to make by covering
> the film/artwork stack with a framed sheet of flexible clear plastic
> and applying vauum to that.
> 
> ST