US 11,869,871 B2
Apparatus and method for self-assembling semiconductor light-emitting device
Juchan Choi, Seoul (KR); Jideok Kim, Seoul (KR); Bongchu Shim, Seoul (KR); Seulbitna Lee, Seoul (KR); Kiseong Jeon, Seoul (KR); and Hyunwoo Cho, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/286,844
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Oct. 8, 2019, PCT No. PCT/KR2019/013158
§ 371(c)(1), (2) Date Apr. 20, 2021,
PCT Pub. No. WO2020/085677, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10-2018-0128474 (KR), filed on Oct. 25, 2018.
Prior Publication US 2021/0351158 A1, Nov. 11, 2021
Int. Cl. H01L 23/00 (2006.01); H01L 21/67 (2006.01); H01L 25/075 (2006.01)
CPC H01L 24/95 (2013.01) [H01L 21/67121 (2013.01); H01L 25/0753 (2013.01); H01L 2224/95101 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A self-assembly apparatus, comprising:
a fluid chamber configured to accommodate a plurality of semiconductor light-emitting devices, each semiconductor light-emitting device having a magnetic body;
a magnet configured to apply a magnetic force to the plurality of semiconductor light-emitting devices while an assembly substrate is disposed at an assembly position of the self-assembly apparatus;
a power supply configured to induce formation of an electric field on the assembly substrate to allow the plurality of semiconductor light-emitting devices to be seated at a preset positions on the assembly substrate in a process of moving the plurality of semiconductor light-emitting devices due to a change in a position of the magnet; and
a fluid injector configured to shoot a fluid to some of the plurality of semiconductor light-emitting devices to allow the some of the plurality of semiconductor light-emitting devices seated on the assembly substrate to be separated from the assembly substrate,
wherein the fluid injector comprises at least one hole oriented upwards in a direction opposite to gravity caused by a gravitational force of the earth and used to shoot the fluid upwards towards the some of the plurality of semiconductor light-emitting devices.