Homebrew PCBs

----- Original Message ----- 
From: "patroclus04" <patroclus04@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, February 20, 2006 9:00 AM
Subject: [Homebrew_PCBs] Re: Photolithography


>
> Thanks. So, as I se,, the light goes inside the box, and the board
> outside, facing down on the light.
> I suppose UV light is not good to take.

It's not a good idea to stare at it for long periods, or expose the skin 
directly to it. I haven't bothered to enclose mine completely.

>
> I just meet a person that uses a fluorescent light tube, and it works
> for him. Just 10 minutes exposure at 10cm. He puts the crystal on top
> of the board, with some weights outside.
>
> I would like to do some test without gettin much into mess. So I might
> try this solution, and if it goes well, then build a proper box. Does
> the box have any special purpose appart from what I said??

No. Don't have the tubes too close to the board, it's quicker but you lose 
some definition because the light is less collimated.

>
> Also, if you want to use only a piece of the board. Can you just cut it
> before exposing?? what is best?

That's what I do. Leave the protective film on it, of course, before 
cutting.

Leon
--
Leon Heller, G1HSM
leon.heller@...
http://www.geocities.com/leon_heller