LASER-ASSISTED HOT EMBOSSING OF MICROSTRUCTURES
Technologies conventionally used to manufacture micro-structured components with geometries below 100μm are injection moulding and hot embossing. Both technologies are mainly limited to polymer materials and require long cycle times since the whole forming tool has to be heated. These drawbacks can be eliminated by using a newly developed laser-assisted hot embossing technology, where high energy density laser radiation is used for a selective and fast heating of the tool and workpiece, respectively. Using a controlled irradiation of the tool surface by high power diode lasers, tool temperatures of more than 500°C can be achieved within seconds. At this temperature even glass and metals can be structured with the new embossing technology. In comparison to other heating technologies like induction heating, materials with low thermal and electrical conductivity like ceramics can also be used for tooling. Transparent tool inserts made of sapphire enable the direct access of the radiation into the tool onto the die. Experiments were conducted with glass, polymers and metals. As an exemplified process the basics for the hot embossing of glass are described in this article
Jens Holtkamp Arnold Gillner
Fraunhofer Institute for Laser Technology, Steinbachstr. 15; 52074 Aachen, Germany
国际会议
第三届太平洋国际激光与光学应用会议(PICALO 2008)
北京
英文
801-806
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）