Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Thomas" <teecee@c...> wrote:
> Hi All
> Has anyone done or know if its possible to modify a Laser printer 
to print directly onto the PCB with Toner ?
> or would a Regular Laser Beam Like those cheapo "Laser pointers" 
expose the Photoresist coating on a Presensitised PCB as I have a 
small XY table that would be suitable for such a CNC venture,  I was 
looking at Duponts website and they talk about a UV Argon Laser for 
LBI ...if the price was right it would be the ultimate Homebrew 
PCB'ers dream http://www.dupont.com/pcm/riston/laserseries.html
> 
> Regards
> Thomas
> 

The toner is transfered to the drum inside the laser and then to the 
paper.  the toner is moved and held in place with a slight electrical 
charge.   The copper of the board would stop the process.

But... there may be a way to cover the board with a non-conducting 
film and print on that.

In my opnion, the best chance we have of a direct print is ink-jet.  
They already make ink-jet printers for printing on things like belts 
and hoses and metals and boxes.   

It seems that we have just not found a good combination of printhead 
and ink.

Dave