Using a method called two-photon lithography, the printer at the Vienna University of Technology was able to print a 285 µm race car as well as a 75 µm model of the St. Stephen's cathedral in Vienna. In contrast to usual 3D printers, the device uses a liquid resin as well as a laser to harden the material when targeted by the laser light. The system supports up to 100 layers that consist of about addressable 200 lines each. "Until now, this technique used to be quite slow", said Juergen Stampfl from the Institute of Materials Science and Technology at the university.
2DayBlog.com, Scientists build 3D Printer for tiny nano-models
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