US 12,484,415 B2
Light emitting display device and method of manufacturing the same
HanSol Choi, Paju-si (KR); and SangHoon Lee, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Dec. 7, 2022, as Appl. No. 18/076,862.
Claims priority of application No. 10-2021-0189822 (KR), filed on Dec. 28, 2021.
Prior Publication US 2023/0207735 A1, Jun. 29, 2023
Int. Cl. H10K 59/131 (2023.01); H10H 29/49 (2025.01); H10K 59/80 (2023.01)
CPC H10K 59/80522 (2023.02) [H10K 59/1315 (2023.02); H10H 29/49 (2025.01)] 17 Claims
OG exemplary drawing
 
1. A light emitting display device comprising:
a circuit layer having an auxiliary power electrode disposed on a substrate;
a protective layer covering the circuit layer;
a contact region formed in the protective layer; and
an undercut structure disposed in the contact region,
wherein the undercut structure includes:
a first pattern disposed on the auxiliary power electrode, the first pattern being spaced apart and discontinuous from the protective layer;
a second pattern disposed on an upper surface of the auxiliary power electrode to support the first pattern; and
a third pattern extending continuously from the second pattern to the protective layer on the upper surface of the auxiliary power electrode,
wherein an upper surface of the third pattern including a first portion covered the first pattern and a second portion exposed by the first pattern,
wherein an undercut region is formed under a peripheral portion of the first pattern laterally protruding from the second pattern, and
wherein a portion of the auxiliary power electrode in the contact region is exposed by the undercut structure.