	US 12,064,952 B2
	Laser transfer printing device and method
Xue Feng, Zhejiang (CN); Baicheng Zhang, Zhejiang (CN); Ying Chen, Zhejiang (CN); Haoran Fu, Zhejiang (CN); Ye Jiang, Zhejiang (CN); and Lanlan Liu, Zhejiang (CN)
Assigned to INSTITUTE OF FLEXIBLE ELECTRONICS TECHNOLOGY OF THU, ZHEJIANG, Zhejiang (CN); and TSINGHUA UNIVERSITY, Beijing (CN)
Appl. No. 17/043,926
Filed by INSTITUTE OF FLEXIBLE ELECTRONICS TECHNOLOGY OF THU, ZHEJIANG, Zhejiang (CN); and Tsinghua University, Beijing (CN)
PCT Filed Dec. 7, 2018, PCT No. PCT/CN2018/119655 § 371(c)(1), (2) Date Sep. 30, 2020, PCT Pub. No. WO2019/227887, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 201810552110.7 (CN), filed on May 31, 2018.
Prior Publication US 2021/0122153 A1, Apr. 29, 2021
Int. Cl. B41M 5/24 (2006.01); B41F 16/00 (2006.01); G02B 27/00 (2006.01); G02B 27/09 (2006.01); G02B 27/10 (2006.01); G02B 21/04 (2006.01); H05K 3/30 (2006.01)

CPC B41F 16/0006 (2013.01) [B41M 5/24 (2013.01); G02B 27/0075 (2013.01); G02B 27/09 (2013.01); G02B 27/10 (2013.01); G02B 21/04 (2013.01); G02B 27/0955 (2013.01); G02B 27/0983 (2013.01); G02B 27/0988 (2013.01); H05K 3/30 (2013.01)]

20 Claims

1. A laser transfer printing device, comprising:

a laser configured to generate a laser beam;

a beam expander disposed on an optical path of the laser beam generated by the laser to expand the laser beam generated by the laser, the laser beam being expanded by increasing a diameter of the laser beam;

a beam splitter disposed on an optical path of the laser beam expanded by the beam expander to reflect the expanded laser beam to a focusing module; and

the focusing module disposed on an optical path of the laser beam reflected by the beam splitter to focus the laser beam and project the focused laser beam to a predetermined transfer processing position to form a transfer printing space, the transfer printing space having a boundary with a light intensity attenuated to 1/e of that of a center of the space.

16. A laser transfer printing method for a laser transfer printing device, comprising:

generating a laser beam by a laser;

expanding by a beam expander the laser beam generated by the laser, the laser beam being expanded by increasing a diameter of the laser beam;

reflecting by a beam splitter the laser beam expanded by the beam expander to a focusing module; and

focusing the laser beam by the focusing module and projecting the focused laser beam to a predetermined transfer processing position by the focusing module to form a transfer printing space, wherein the transfer printing space having a boundary with a light intensity attenuated to 1/e of that of a center of the space.