Hi guys. I need two laser diode one of them for remove UV color from pcb (remove only color and don’t harm to copper layer)and other one remove copper from pcb .please help me to find each laser diode correct Watts.so how much Watts need each laser diode .
Be attention I have not much money in my pocket so price is very important . Cheap one is Goldy one but must be good one 
I doubt you’ll be able to find a laser diode to remove copper; it just doesn’t cut metal. I’m not sure what you mean by the UV color; if you mean the purple trace protection that is applied to commercial PCBs, I don’t know if a laser diode would be able to do that, either, but maybe. Blue laser diodes are very sensitive to the colors; most of the blue end resists being affected by the blue diodes. I hope someone else chimes in and corrects anything I’ve said; I just don’t have the experieince with PCBs to give a definitive answer, but what I’ve said comes from reading other’s posts on creating PCBs. This usually involves coating the copper-clad with black paint (typically acrylic paint or something that won’t dissolve in water), using the laser to remove where you want to etch, etch the PCB to remove the unwanted copper, take off the paint with the appropriate solvent, drill holes, optionally add a mask to cover everything that won’t get soldered, and solder the parts on.
Hi dude .Uv color means solder mask . Yeah good answer but if you tell me about laser power and watt I preciate that
No visible-light diode laser can remove copper, so laser power is irrelevant.
All visible-light diode lasers will have difficulty removing green solder mask material, so you must try them with your materials under your conditions to find out. The amount of power will depend on the processing speed you must achieve, with the caveat that more power may damage the fiberglass surface under the mask.
Previous discussions may be informative:
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Hi.
Welcome to the LB forum Himo.
If I guess Your intended application correctly, that’s a dilemma the copper recycling industry has tried to tackle for the last fifty years or so.
A feasible solution has not been found, and since the precentage of copper in a pcb has diminished greatly over the decades -not to mention the bulk of the copper (traces) is nowadays inside the multilayer pcb- there’s a good probability that it never will.
In any case, a laser is not the correct proverbial hammer to that just as proverbial nail.
Copper is just simply too cheap a material, and there’s way more profitable and easier sources of it.
If there’s enough precious metals in the pcb or in the components, it can be ground up, “washed”, and the metals extracted via electrolysis.
In that case the money/profit comes from the precious metals, copper is a nice few % addition to it.
Sometimes the ground up material is pressed into pellets with or without a bonding agent if it has to be stored or transported.
Otherwise the oxidizing reduces the salvageable percent of copper too greatly, and the copper oxide may reduce the purity of the precious metals too much for the process to be profitable.
Regards,
Sam
