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Direct Laser Interference Pattering of BSH mould

Our Partners have been busy, The University of Stuttgart IFSW have structured the surface of the injection mould (provided by our partner BSH), with a line like periodic structure by means of the Direct Laser Interference Patterning (DLIP) method.


Fig. 1: Injection mould after DLIP Treatment. Process was done with a structuring rate of 416 mm2/s onto an area of about 280 x 520 mm2. The DLIP optics used can be seen in the top right.

The period of the structure is 855 nm. This process was done with a structuring rate of 416 mm2/s (considering only the laser on time) onto an area of about 145,600 mm2 (280 x 520 mm2), 1000 x 500 mm2 are possible with the current system. The mould has a weight of about 500 kg. The used laser source is the TresClean ThinDisk Multipass Amplifier (TDMPA) with 8 picoseconds pulse duration and an average power of up to 1 kW at 300kHz repetition rate developed and built by University of Stuttgart IFSW. This periodic structure will then be transferred to the inner surface of the plastic water tanks after the injection process.


Fig. 2: Scanning Electron Microscope images of the structure with a line like topography and a period of 855 nm.

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The TresClean project is an initiative of the Photonics Public Private Partnership and has received funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No. 687613