Homebrew PCBs

----- Original Message ----- 
From: "brewski922" <brewski@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, February 07, 2006 7:07 PM
Subject: [Homebrew_PCBs] Re: Toner transfer experiments and a fix for cheap, 
low-temp laminators


>> Why not use the UV exposure technique? It's much simpler and
> quicker
>> and the results are excellent.
>>
>
> Ben there done that, BACK IN THE MID-70s. My gosh, am I that old.
>
> Anyway, from what I remember that was a pain.
>
> 1) Make the PCB artwork.
> 2) Print it on paper.
> 3) Expose the negative.
> 4) Develop the negative.
> 5) Place the negative on a photo sensetive PCB, glass on top of that
> with a weight to make the negative in direct contact with the PCB.
> This has to be done under darkroom lighting.
> 6) Expose the PCB to the UV.
> 7) Develope the PCB.
> 8) Etch the PCB.
> 9) Cut to size and drill.
>
> I realize some of these steps are done in the Toner-Transfer method.
> The TT method must be reconized as a homebrew method.
>
> You are doing this the Twenty-first century way and I for sure don't
> know what might be considered the best homebrew way of doing. I would
> like to get back into making my own prototype PCBs. I'm sure you are
> using one of the better methods. How is the best for me to start
> making PCBs?

If you look back over my recent posts you will see details of my technique.I 
simply print 1:1 onto film with an inkjet printer. I can do 8 mil tracks and 
0.5 mm lead spacing ICs on single-sided boards without any problems -about 
the same as the low-cost PCB suppliers like Olimex.

Leon 

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