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We have developed a new type of non-contact three-dimensional photo-thermal etching method for agar microculture chips exploiting the characteristics of two different wavelengths of infrared laser beams. We used two different wavelengths of infrared (1480 and 1064nm) focused laser beam as a heat source to melt and remove a portion of 200μm high agar gel layer on the 5nm thick chromium-coated glass...
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