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Interesting demo but i think i'll keep my reflow station for now.

for thick material i'm not surprised that the beam would diffuse. however, i figure that i will likely be firing the laser at a film 50 microns or less. i'm hoping that the beam will pass thru the wax and be reflected back by the copper before it has a chance to diffuse. pigment is an option...

if the beam is .1 mm i figure i can probably get a lot of energy into a very small spot. the idea is to vaporize the plastic. if the temp is high enough (400-500F) the wax will instantly go to a vapor state. i think the trick will be to remove wax without the adjacent material melting and...

I saw something online from a guy who tried it but failed. I'm not sure why he failed. There are also articles about ppl trying to use wax paper to apply toner. The reason i wanted to try removing wax is to reduce making pcb's to a two step process. Print, etch. no toners, transparencies, UV, etc.

Wax doesn't etch copper. i want to use it as a resist - which is a shield that protects selected areas of copper from being etched by the etchant. Moving - microcontrolled stepper motor. An engraving setup is probably very close to what i want.

I figured that I'd probably need some way to focus the beam - even if the LD were close to the part. As to moving the laser, I'll be using a microcontrolled stepper. And, from what little info i could find on regular paraffin wax it looks like the optimal wavelength is around 700 nm so it...

I would like to try using wax as a resist for etching PCB's. To do SMD's I would need to be able to burn lines in the wax with a resolution of 100 microns or possibly less. Ebay has some cheap 808nm 300mW laser diodes that I was thinking about trying. My questions are; would it be possible to...