Homebrew PCBs

as i'v e emailed someone on here ..  my concern is .. the media .. i had a lightscribe dvd on my hp laptop and i never used lightscribe.. the media is $1 each maybe more this is 5 to 10 times more than reg.

and i guess it takes 30 to 45 minutes to do it .. i dont know what the media is like that gets 'burned ' off in lightscribe ... 

this sounds like a great idea, but like the printing ink using an epson cd printer like an R200, -- its not all its supposed to be ..

you have to get special ink ? or use a hybrid process of toner and heat with ink .. 

also the cd tray tends to hit something if the printer up against a wall and then the mechanism doestn work so well, in fact not at all for me .



--- In Homebrew_PCBs@yahoogroups.com, "DmitriA" <rcdd@...> wrote:
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> 
> 
> 
> The burning laser diodes in CD recorders are near-IR (780nm), DVD recorders are red (~650nm) and Bluray recorders are, well, blue (405nm) with the latter getting sort of kinda close to UV though probably not close enough.
> 
> I've never seen Lightscribe resolution mentioned anywhere but, given that the stepper-driven worm cannot position the diode sled better than approx. 0.15mm (20 steps per rev stepper directly coupled to a 3mm lead worm) the resolution would have been probably OK for PCB printing. Looks like it converts to 169 dpi which is decent enough. In fact, given that the DVD-R/RW optics are usually spec'ed as "better than 0.05mm beam" and the lens can adjust itself relative to the stepper-driven sled, the actual resolution may even be better than 169 dpi but I doubt they use precise adjustments for such a crude operation as burning a visible image on the back of a CD...
> 
> --- In Homebrew_PCBs@yahoogroups.com, Tim Hills <thills@> wrote:
> >
> > 2 things come to immediately to mind.
> > 
> > CD/DVD recorders use Infrared lasers and most photoresist is UV sensitive.
> > 
> > I don't know if the resolution of a lightscribe would be fine enough.
> > 
> > Worth a shot though if you can find IR sensitive resist.
> > 
> > TIm
> > 
> > On 4/13/2011 8:31, Boman33 wrote:
> > >
> > > Here is a crazy idea that might just work:
> > >
> > > A first requirement is being able to cut out a PCB the to look just like a
> > > CD. It needs to be accurate and typically a lathe would be used. Apply a
> > > layer of paint or other protective coating over the copper.
> > >
> > > Pop it into a CD burner that has the Light Scribe or whatever it is called
> > > feature to mark CDs. Take the layout and convert it to a JPG and use the
> > > marking software to place it on the CD. Several small SMT PCBs will fit on
> > > a CD. "Write" the picture to the "CD" and hopefully it will vaporize the
> > > paint. Afterwards etch the boards as usual.
> > >
> > > If the power is controllable, it might also be used to expose a 
> > > photoresist
> > > as an alternative.
> > >
> > > Bertho
> > >
> > >
> > 
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
>