Researchers demonstrate the first chip-based 3D printer

https://techxplore.com/news/2024-06-chip-based-3d-printer.html

"single, mm-scale photonic chip with array of 160-nm-thick optical antennas to steer beam projecting into liquid resin (with long shelf life) rapidly curing when exposed to beam's wavelength... no moving parts... speeding up/ delaying optical signal on either side of antenna array moves beam in certain direction... entire chip fits onto a U.S. quarter... prototype 3D printed arbitrary 2D shapes within seconds, actual device to emit hologram in resin well enabling 1-step 3D printing"