期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 77, 期 3-4, 页码 371-373出版社
SPRINGER-VERLAG
DOI: 10.1007/s00339-003-2191-8
关键词
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We report on the femtosecond laser fabrication of micro-channels of sub-micrometer cross section recorded in polymethylmethacrylate (PMMA) films in a single processing step. Both axial lengths of an elliptical cross section smaller than 0.4 mum were achieved for a fabrication irradiance close to the dielectric breakdown of PMMA. Femtosecond pulsed irradiation was scanned along the three-dimensional (3D) patterns inside the film. Channels have a self-formed densified cladding and can be 3D stacked into any pre-designed pattern and can extend over a mm length. These features are prospective for micro-total analysis system (mu-TAS) chip fabrication, micro- or nano-fluidic studies, and photonic applications such as photonic crystals .
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