Homebrew PCBs

On Nov 12, 2007 5:21 AM, Andrew Tweddle <sarason@...> wrote:

> The basic theoretical reason that laser drum straight to copper circuit
> board won't work is that it(the copper surface) provides a short circuit
> onto the drum surface which is an insulator that has a few thousand
> volts applied to it to hold the toner. Stefan's idea that a pickup
> roller can then be provided is a good one. Next you would then need to
> provide a HT (high tension connection to pick the toner off the pickup
> roller and then onto the copper board and then fuse it on with heat.

Maybe even the corona wire wil be enough to push some charge on the
surface of the drum. Works with paper after all.


Lez, i know you say it looks OK, but i'll still believe not all toner
is transferred and it would not hold up to etching.
You are welcome to show that i'm mistaken.

ST