Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2004 · 12 citations · 0 references
EngineeringMaterials EngineeringMaterials ScienceMicrofabricationPhotonicsPolymer Chemistry3D PrintingFabrication MaterialsMicrofabrication MaterialsMicrofabrication ProcessesOptical PolymersSoft LithographyAbsorption SpectrumFemtosecond Laser PulsesMicroscale FabricationPhoton AbsorptionPhotopolymer MaterialsPhotopolymerizationStereolithographyTwo-photon Absorption
As a femtosecond laser has recently been developed, both of high power and high photon density are easily obtained. The high photon density results in photopolymerization of urethane acrylate resin whose absorption spectrum is shorter than that of the femtosecond laser. The stereo-lithography using the two-photon absorption (TPA) makes micro structures with great resolution. We used this phenomenon to make micron-sized structures with sub-micron resolution. Before fabricating 3-D structures, precise 2-D structures were preceded. The TPA photopolymerization was applied of poly-dimethyl siloxane (PDMS) molding. In this paper, we report the recent progress and application of this technology in our laboratory.