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

Why not focus the projection and move either the projector or PCB while only exposing portions of the PCB at any one time. Essentially maskless lithography.

There are a products that do just this kind of exposure activity emerging in the semiconductor industry. Some websites after a quick google -

http://en.wikipedia.org/wiki/Maskless_lithography
http://www.intelligentmp.com/
http://www.freepatentsonline.com/6764796.html
http://www.lumarray.com/
http://focus.ti.com/pdfs/dlpdmd/Digital_Projection_of_UV_Light_is_Enabling_New_Markets1.pdf

I thought the plasma TV without phosphorus was a real neat idea.

Joseph

--- In Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@...> wrote:
>
> "javaguy11111" <javaguy11111@...> writes:
> > The resolutions of most of the ones I have seen are somewhat
> > limited, but I think there will be 1080p capable projectors on the
> > market in relatively short order.
>
> The last board I did was a lowly 5x2" and was 14,400 "pixels" across.
> I think 1080i is nowhere near enough resolution for PCB exposure.
>