Hi David > iv'e try'd copper and even with 600w + it's difficult to even mark it
Yes, 600W is not enough. That's why a q-switched laser with short pulses is needed. Pulse peek energy on my laser is 25 kW, that's still not enough, the one on the mentioned laser was about 1 MW. This instantly turns the coper into plasma. Its not melting not vaporising it, it tuns a very thin layer into plasma within less than a ns. This process is very controlled an would allow to remove the 35 mµ of coper in multiple paths without heating the FR4 and without hardly removing any of it. cu Flo ------------------------------------------------------------------------------ Sponsored by Intel(R) XDK Develop, test and display web and hybrid apps with a single code base. Download it for free now! http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
