Homebrew PCBs

Robert Hedan wrote:

> First test results:
> 
> 
> Printing to parchment paper:
> - a few missing pixels, bad for thin traces.
> - black is not as dense as on regular paper.
> 
> Laminating:
> - 1st pass 50% pattern adhesion.
> - 2nd pass 40% adhesion.
> - missing more than just a few pixels, trace quality unacceptable.
> 


   Similar here with 6L and ironing.  I did rush everything and little prep just 
to get an idea of how it'd work.  Note that where it did get things to stick 
well, the transfer was very good so does have promise.  Truly non-stick, it's 
easy for the page to come up and then move with a small piece.

   I think it's pretty clear simply getting enough heat to the toner is the 
problem.  Silicone is a good insulator, and where mine transferred well was a 
pattern under the heating element of the iron.

   Heating the board to X temperature and then doing a flat press may work 
better, putting the heat there and straight on the toner.  Or just preheating 
the board enough so the laminator doesn't have so much work to do etc.

Alan