US 11,999,098 B2
Parallelized 3D lithography using multi-beam, multi-color light-induced polymerization
Vincent Hahn, Karlsruhe (DE); Patrick Müller, Karlsruhe (DE); Eva Blasco, Karlsruhe (DE); and Martin Wegener, Karlsruhe (DE)
Assigned to Karlsruher Institut für Technologie, Karlsruher (DE)
Appl. No. 17/413,357
Filed by Karlsruher Institut für Technologie, Karlsruhe (DE)
PCT Filed Oct. 21, 2019, PCT No. PCT/EP2019/078557
§ 371(c)(1), (2) Date Jun. 11, 2021,
PCT Pub. No. WO2020/126154, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 102018009916.5 (DE), filed on Dec. 17, 2018.
Prior Publication US 2022/0055290 A1, Feb. 24, 2022
Int. Cl. B29C 64/129 (2017.01); B29C 64/245 (2017.01); B29C 64/255 (2017.01); B29C 64/273 (2017.01); B29C 64/282 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01)
CPC B29C 64/129 (2017.08) [B29C 64/245 (2017.08); B29C 64/255 (2017.08); B29C 64/273 (2017.08); B29C 64/282 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 13 Claims
OG exemplary drawing
 
1. A method for additive manufacturing of a 3D-structured form, the method comprising the steps of:
i) providing a liquid photoresist comprising at least one monomer and at least one photoinitiator system comprising an α-diketone or a photochromic compound selected from the group consisting of 2-methoxy naphthalene and spiropyrans; and
ii) irradiating the liquid photoresist with a first light source at a first wavelength Ai and with a second light source at a second wavelength λ2 either simultaneously or sequentially with a time interval of less than 1 ms to harden the liquid photoresist and produce the 3D-structured form,
wherein λ1≠λ2, and
wherein the hardening of the liquid photoresist to produce the 3D-structured form takes place only at the position which is irradiated by the first light source and the second light source either simultaneously or sequentially with the time interval of less than 1 ms.