Homebrew PCBs

On Mon, 27 Mar 2006 18:38:12 +0200, Alan Marconett <KM6VV@...> wrote:

> Then again, we used to just DRAW on a blank PCB with a Sharpie permanent
>
> marker, and then etch the board.  Another way simple boards were done a
>
> college lab was to draw traces on a masking tape covered PCB, cut them  
> out
>
> with an Exacto knife, and then fill in the cutouts with nail polish!   
> After
>
> carefully pealing off the masking tape, the board could be etched.   
> Perhaps
>
> finger nail polish could be used in an appropriate delivery system?  Once
>
> one has the delivery system, then moving the "pen" around on the PCB is a
>
> piece of pie!


I tried plotting with colophony resin once. It did not work, i had diluted  
it in alcohol and the layer was not thick enough. The trailing edge of the  
plotter pen "scraped" the resist off again. Sticky mess too. (Same problem  
as with OHP marker ink)

If you can figure out how to do that you not only have a great resist, you  
also have the board fluxed for soldering already ;-)

ST