Homebrew PCBs

On Sat, 30 Sep 2006 16:42:49 +0200, kilocycles <kilocycles@...>  
wrote:

>  One
> problem, yet unsolved, which was not part of the test, is performance
> of tape when it has to overlap for coverage.  I've been getting some
> seepage  under the overlaps at the edge of the boards using 3M 33+
> electrical tape.


I found the problem goes away if i rub the overlap with a fingernail to  
close it up. I used thin PE or PP tape.

Best seems to be to avoiding to mask stuff at all, simply etch both sides  
at once.

ST