Nanosecond laser pulses for aluminum and copper drilling

Walid K. Hamoudi
2018 Iraqi Journal of Physics  
Nd:YAG laser pulses of 9 nanosecond pulse duration and operating wavelength at 1.06 μm, were utilized to drill high thermal conductivity and high reflectivity aluminum and copper foils. The results showed a dependence of drilled holes characteristics on laser power density and the number of laser pulses used. Drilled depth of 74 ϻm was obtained in aluminum at 11.036×108 W/cm2 of laser power density. Due to its higher melting point, copper required higher laser power density and/or larger number
more » ... nd/or larger number of laser pulses to melt, and a maximum depth of 25 μm was reached at 13.46×108 W/cm2 using single laser pulse.
doi:10.30723/ijp.v16i36.26 fatcat:xxeigvsuhzaybm3crw5j26q3ka