Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Thanks all

--- In Homebrew_PCBs@yahoogroups.com, "Tony Smith" <ajsmith1968@...> wrote:
>
> > >You need UV lamps (long wave for positive resist)!
> > >
> > >Leon
> > >--
> > >Leon Heller
> > >G1HSM
> >
> > 405nm?
> > Cristian
>
>
> About that, some boards need closer to 370nm. That's in the UVA band. The
> germicidal ones are UVC (200nm-ish).
>
> The UV LEDs you can buy are usually around 400nm or so, which is why they
> work. I've seen shorter wavelength ones, but they were a bit $$$. Those
> little nail polish curing lamps are probably the cheapest (off eBay).
>
> Tony
>