Homebrew PCBs

> -----Message d'origine-----
> De : Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com] De la part de dagmargoodboat
> Envoyé : juin 28 2006 21:13
> À : Homebrew_PCBs@yahoogroups.com
> Objet : [Homebrew_PCBs] Re: Toner melting points, pt. 2
> 
...
> Using Staples' Picture Paper, my first try through
> the laminator gave a perfect--and I do mean perfect--
> transfer of a junk board with some 0.006" lines onto
> 0.020" double-sided circuit board.  Very nice.
> 
> The second attempt--on a real board to be etched--
> was not perfect though.  Traces had a few gaps, and
> some pitted / ragged edges.  Mostly okay, but not
> acceptable.  I'm using 0402 parts, and need fine
> lines. Subsequent trials have not improved.
...
> 
>   Best,
>   James


Welcome James,

Since you were able to get perfect results on the scrap board, I would
suggest looking more into the preparation of the PCB surface.  The scrap
board might have had better 'stiction' than the newer board.

My prep:

- XXXX fine steel wool, scrubbed in both directions, X and Y.
- clean with acetone.
- clean with 99.9% isopropyl alcohol.
- wipe alcohol residue dry.

This cleaning process is extremely exaggerated, but I never have to start a
board over 'cause toner doesn't stick (I'm using Pulsar Paper and a GBC H300
laminator).

Robert
:)