Different ps-laser systems at 10 ps with up to 80 W at 1064 nm with a pulse repetition rate up to 8 MHz and energies up to 50 μJ (at lower repetition rate) have been used in a micro-engraving system for large cylindrical workpieces. This setup allows the micro structuring of cylinder surfaces as well as the processing of thin film substrate sheets up to a thickness of approximately 300 μm. Dimensions up to 7 m face length and circumferences up to 1,3 m can be processed with an accuracy of about 1μm. A variety of metals have been investigated by structuring 2D and 3D elements. The process is nearly melt-free, but the resulting surface structure of the ablated zone depends on the sort of metal. The high fluencies also enable the engraving of transparent materials which allow a much faster micro processing speed compared to metals. This work shows examples of micro-structuring melamine-resin coated cylinder surfaces and hybrid materials. |
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CITATIONS
Cited by 4 scholarly publications.
Printing
Metals
Laser ablation
Laser engraving
Pulsed laser operation
Nonmetals
Carbon