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. 2019 Dec 30;5:64. doi: 10.1038/s41378-019-0116-8

Fig. 5. μ-SLS process flow-chart.

Fig. 5

The process starts with a homing routine for the initial optical alignment of the sample under the optical station using fiducial markers. The slot-die coater and the plumbing lines are primed and the sample is then translated to the slot die coating system where the nanoparticle ink bed is laid down. The ink is partially dried using an infrared heater and the layer height is measured in situ. The sample is then moved under the optical system where the initial position alignment is done. After the position is fixed, the sliced layer pattern of the 3D CAD model is sent to the DMD controller and the pattern is projected on the coated layer during the laser sintering process. The XY-Nanopositioner is stepped and the pattern is scanned over the sample area. The sample is then translated back to the slot die coating station where the next layer is laid down, and after which the sintering process is repeated. To maintain layer overlay control, the XY-nanopositioner is used to align the layers. After n layers are sintered, the excess NP ink is removed using a sonicator and the fabricated part is annealed to ensure good part quality.