Applied Physics A

, Volume 76, Issue 3, pp 355-357

Efficient submicron processing of metals with femtosecond UV pulses

  • J. BékésiAffiliated withLaser Laboratorium Göttingen e.V., Hans-Adolf-Krebs Weg 1, 37 077 Göttingen, Germany
  • , J.-H. Klein-WieleAffiliated withLaser Laboratorium Göttingen e.V., Hans-Adolf-Krebs Weg 1, 37 077 Göttingen, Germany
  • , P. SimonAffiliated withLaser Laboratorium Göttingen e.V., Hans-Adolf-Krebs Weg 1, 37 077 Göttingen, Germany

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Abstract.

The generation of submicron-sized holes on metal surfaces by applying femtosecond UV laser pulses was investigated. Different optical schemes based on a Schwarzschild-type reflective objective were used to reach optimized ablation quality and efficiency in different applications (hole ablation, through-hole drilling, generation of surface patterns consisting of holes, etc.). Submicron-sized holes and hole patterns were ablated onto metal surfaces and drilled through ∼5-μm-thick steel foils with 600-nm diameter on the output side. Using a special optical interferometric method, large-area surface processing of high-conductivity materials in the submicron regime was performed. Combining these techniques with the application of high-repetition-rate ultra-short UV laser sources, large-area sub-μm processing of all kinds of materials in industrial environments is possible.

PACS: 06.60.J; 61.80.B; 79.20D; 81.05B; 81.40