A solid laser-diode plotter (SLP) system is one of the commercial rapid prototyping (RP) systems developed and marketed in Japan. In the SLP system, two semiconductor lasers are employed instead of a UV laser or a diode-pumped solid state laser, as used in the stereolithography process to cure a specially designed photopolymer. An ascending platform is used to build the suspended solid model, and only a small amount of resin is cured in a thin layer on a plate of glass just below the last layer built. Hence, the SLP system is a low-cost RP system and is well suited for educational purposes, because a high-power laser is not involved and only a small amount of resin is used. However, the over-curing of the overhanging area is a processing problem in the ascending platform method, because the built part is suspended. In order to reduce the over-curing of the SLP parts, the Taguchi method was employed to analyse the processing parameters. The effect of the processing parameters on the over-curing was investigated and presented. The results show that the over-curing of the SLP parts was reduced about 40% using the optimal processing parameters as analysed by the Taguchi method.
In this study, we look into an innovative technology which utilizes nano-particles as a medium for imprinting. This technology integrates the advantages of soft lithography, photo-cure resist, and gas assisted imprinting. We try to produce micro-lens arrays by gas-assisted nano-particles based soft mould imprinting on photo-cure resists. It helps the application and technology of nano-imprinting becoming more sophisticated. We find that PDMS can be used to precisely replicate micro-to-nano-meter level micro-structures. Together with nano-particles and well-proportioned gas pressure, we can construct a perfect shape of micro-structures and achieve a conformal contact with the surface of base material. It increases the effective imprinting area significantly and improves the replication capability of the transfer. Meanwhile, the PDMS soft mould is easy for production and fast in replication, which reduces the cost remarkably. Furthermore, it has a low surface free energy and low viscosity to the resists. Integrating gas assisted nano-particles imprinting can be a great advantage in the process of micro-structure.
A creative technology was used in this research. Using the PDMS flexible mold magnetic powder method to transmit imprinting, and by combining the special characteristics of the soft lithography, polymethylmethacrylate (PMMA), and electromagnetic Plate uniform control pressing technology, researching the use of magnetic flexible mold imprinting technology to produce the optical waveguide devices, so as to allow the usage and the technology of micro hot embossing or nanoimprinting more mature.
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