US 11,791,369 B2
Method for aligning a light-emitting element, method for fabricating a display device using the same and display device
Hyun Woo Lee, Seoul (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Jun. 10, 2020, as Appl. No. 16/897,998.
Claims priority of application No. 10-2019-0161605 (KR), filed on Dec. 6, 2019.
Prior Publication US 2021/0175279 A1, Jun. 10, 2021
Int. Cl. H01L 27/15 (2006.01); H01L 33/00 (2010.01); H01L 33/20 (2010.01)
CPC H01L 27/156 (2013.01) [H01L 33/0095 (2013.01); H01L 33/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of aligning light-emitting elements, the method comprising:
providing a base substrate and a plurality of conductive patterns on the base substrate, the plurality of conductive patterns being spaced apart from one another;
spraying ink in which a plurality of light-emitting elements are dispersed on the base substrate, and positioning the plurality of light-emitting elements on the plurality of conductive patterns; and
orienting the plurality of light-emitting elements by orienting one end of each of the plurality of light-emitting elements in a first direction,
wherein a light-emitting element of the plurality of light-emitting elements comprises a first electrode unit and a second electrode unit respectively at two ends of the light-emitting element, and a conductive ball on the first electrode unit and in direct contact with the first electrode unit,
wherein the conductive ball is on a side of the light-emitting element other than the two ends of the light-emitting element, and adjacent to one of the two ends of the light emitting element, and
wherein the second electrode unit is not in contact with any conductive balls.