Journal article
Laser drilling of high aspect ratio holes in copper with femtosecond, picosecond and nanosecond pulses
Abstract
Deep laser holes were drilled in copper sheets using various pulse lengths and environments. By recording the intensity on a photodiode placed under the sample while drilling the holes, we obtained the number of pulses to drill through the sheet as a function of pulse length and energy. The entrance diameter of the holes was successfully predicted using a Gaussian approximation and a material removal fluence threshold of 0.39 J/cm2 for a pulse …
Authors
Weck A; Crawford THR; Wilkinson DS; Haugen HK; Preston JS
Journal
Applied Physics A, Vol. 90, No. 3, pp. 537–543
Publisher
Springer Nature
Publication Date
3 2008
DOI
10.1007/s00339-007-4300-6
ISSN
0947-8396