@article{FlachsEmmerichRothetal.2019, author = {Flachs, Dennis and Emmerich, Florian and Roth, Gian-Luca and Hellmann, Ralf and Thielemann, Christiane}, title = {Laser-bonding of FEP/FEP interfaces for a flexiblemanufacturing process of ferroelectrets}, series = {Journal of Physics: Conference Series}, volume = {1407}, journal = {Journal of Physics: Conference Series}, number = {012107}, doi = {10.1088/1742-6596/1407/1/012107}, pages = {1 -- 5}, year = {2019}, abstract = {This paper presents an optimized laser-bonding process for piezoelectric energy-harvesters based on thin fluorinated-ethylene-propylene (FEP) foils, using an ultra-short-pulse(USP) laser. Due to the minimized thermal stress in the material during bonding, achieved bypulse durations of few picoseconds, we created seams down to 40μm width without generatingholes in the 12.5μm thick FEP-foils. Using a galvanometer scanning system allowed for fastbonding-speed up to several centimeters per second, making the process also suitable for largestructures and areas. The achieved bond strength of the seams under influence of shearingstress was examined using tensile testing, which showed a sufficient strength of about 25 \% of the maximum strength of an unbonded, single layer of FEP.}, subject = {Ultrakurzzeitlaser}, language = {en} }