US 12,439,755 B2
Display device and manufacturing method thereof
SeungHan Paek, Seoul (KR); HyunJin An, Gyeonggi-do (KR); Kyungjae Yoon, Seoul (KR); and Jeonphill Han, Gyeonggi-do (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Sep. 7, 2022, as Appl. No. 17/939,419.
Claims priority of application No. 10-2021-0192352 (KR), filed on Dec. 30, 2021.
Prior Publication US 2023/0216005 A1, Jul. 6, 2023
Int. Cl. H10H 20/857 (2025.01); H10H 20/01 (2025.01); H10H 20/84 (2025.01)
CPC H10H 20/857 (2025.01) [H10H 20/01 (2025.01); H10H 20/84 (2025.01); H10H 20/034 (2025.01); H10H 20/0364 (2025.01)] 10 Claims
OG exemplary drawing
 
1. A display device, comprising:
a substrate including a display area and non-display area;
a signal line disposed in the display area of the substrate;
a test line disposed in the non-display area of the substrate and connected to the signal line; and
a first lower etching stopper layer disposed between the substrate and the test line,
wherein a rear surface edge of the substrate is located further inside than an outer side edge of the first lower etching stopper layer, and
an end portion of the test line includes a portion that is located further outside than the rear surface edge of the substrate and does not overlap the substrate.