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Laser forward transfer using structured light
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DOI：10.1364/OE.23.000422.png)
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Abstract
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A digital micromirror device (DMD) is used to spatially structure a 532 nm laser beam to print features spatially congruent to the laser spot in a laser-induced forward transfer (LIFT) process known as laser decal transfer (LDT). The DMD is a binary (on/off) spatial light modulator and its resolution, half-toning and beam shaping properties are studied using LDT of silver nanopaste layers. Edge-enhanced checkerboard beam profiles led to a similar to 30% decrease in the laser transfer fluence threshold (compared to a reference checkerboard profile) for a 20-pixel bitmap pattern and its resulting 10-mu m square feature. (C) 2015 Optical Society of America
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