Homebrew PCBs

On Mon, 18 Feb 2008, Leslie Newell wrote:

> That one has occurred to me before. I even got as far as disassembling
> an old black and white laptop to investigate. The biggest problem I can
> see is the thickness of the glass. Unless you have extremely good
> collimation of the light you will get severe undercutting.

I doubt it would work - the LCD would expose a grid onto your light
sensitive material (look at your LCD monitor closely - it's a grid of
pixels - positive exposure, you'd get tracks composed of very small
squares).

It would only work with diffuse, very un-collimated light (to avoid just
getting a grid pattern), which would mean you'd only be able to use it for
very large features.