Homebrew PCBs

I would think using a mirror like that would cause  the sides of the exposed area to not be vertical.


--- In Homebrew_PCBs@yahoogroups.com, "lmri2071" <lmri2071@...> wrote:
>
> This is wonderful !
> 
> I spent seven years to see something like that.
> 
> I think, that the next step would be use a polygonal mirror. Maybe, trying to modify a laser printer.
> 
> Lucho 
> 
> --- In Homebrew_PCBs@yahoogroups.com, "Volkan" <v_sahin@> wrote:
> >
> > I did some tests on dry film that is exposed with blue laser. You can find the result files under http://tech.groups.yahoo.com/group/Homebrew_PCBs/files/BlueLaser_LDI_Volkan/ folder.
> > The minimum feature size that I achieved is 2.8/2.8  mil width and space. There is no problem to print 1.4/1.4 mil width and space but development of the dry film is a little bit problematic and it is not possible to do it with simple tray technique. The film that I'm using has a thickness of 1.5 mil, according to some google results the limit is 1.5*film thickness, so if it is true it seems my results are almost at the limit. 
> > 
> > Volkan
> >
>