Homebrew PCBs

I can help anyone interested in blank boards with dryfilm 
photoresist. I have a laminator and plenty of dryfilm resist on hand. 

Also have a photoplotter that makes positive or negative films from 
Gerber photoplot data. Contact me off list if there is any interest.  

Tom     twb8899@... 


--- In Homebrew_PCBs@yahoogroups.com, Matt Lorenz <mklorenz@c...> 
wrote:
> can you share more information about where to purchase these photo 
boards.
> 
> do you have to keep the boards in the dark same as photography?
> 
> do you have to expose, develop, stop, fix, then etch?
> 
> what are the steps to processing?
> 
> thanks.
> 
> mkl
> 
> 
> ----- Original Message -----
> From: <ted@s...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Saturday, December 14, 2002 7:17 AM
> Subject: [Homebrew_PCBs] Re: How to make a PCB at home
> 
> 
> > What led to the failures?
> >
> > I'm a novice at home PCB etching but had very good success with
> > photo-transfer.
> >
> > I purchased pre-sensitized PCB's then printed my PCB designs on an
> > Epson inkjet printer and high quality transparency film. The 
quality
> > was superb. Doing this I was able to make double sided boards
> > without too much hassle. The pre-sensitized boards were about $25
> > per square foot, I think.
> >
> > I compared this to printing the designs on a laser printers (I 
tried
> > two different lasers) and neither of the lasers had accurate
> > reproductions. The material didn't feed consistently and the
> > magnification wasn't exactly 100%. The inkjet on the other hand 
was
> > super accurate, beyond my capacity to measure.
> >
> > The main thing I had to do was get high quality inkjet 
transparency
> > film and print in highest quality mode.
> >
> > The film I used was Pictorico premium OHP transparency film. The
> > quality is absolutely perfect on this film, much better than the 
3m
> > and Apolo films I tried which don't seem to take the ink very 
well.
> >
> > The other thing that was important was to print the images 
mirrored,
> > so that I could put the printed side of the material in direct
> > contact with the board. If you print normally, then the light has 
to
> > go through the transparency material after striking the printed
> > pattern, and then it gets blurry by the time it reaches the board.
> > This is key for sharp lines. Plus of course the glass on top to 
keep
> > things flat.
> >
> > good luck.
> > -Ted
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "Salam <salamgobran@h...>"
> > <salamgobran@h...> wrote:
> > > what is the best way to produce a PCB out of a layout on the PC 
at
> > > home ?? i tried  a lot and failed a lot
> >
> >
> > Be sure to visit the group home and check for new Bookmarks and 
files:
> > http://groups.yahoo.com/group/Homebrew_PCBs
> >
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> >
> >
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> >
> >