US 12,261,176 B2
Display device having improved reliability of pad portion
Kohei Ebisuno, Hwaseong-si (KR); Jin-Suk Lee, Gwangmyeong-si (KR); Jong Min Lee, Suwon-si (KR); Jun Young Kim, Suwon-si (KR); and Yong Ho Yang, Suwon-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Dec. 2, 2021, as Appl. No. 17/541,196.
Claims priority of application No. 10-2021-0060109 (KR), filed on May 10, 2021.
Prior Publication US 2022/0359573 A1, Nov. 10, 2022
Int. Cl. H01L 27/12 (2006.01); G02F 1/1345 (2006.01); G02F 1/1362 (2006.01); H10K 59/131 (2023.01)
CPC H01L 27/124 (2013.01) [G02F 1/13458 (2013.01); G02F 1/136272 (2021.01); G02F 1/136286 (2013.01); G02F 1/13629 (2021.01); H01L 27/1259 (2013.01); H10K 59/131 (2023.02)] 6 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate including a display area and a non-display area;
a transistor and a light emitting element which are disposed on the display area;
a pad portion disposed in the non-display area, wherein the pad portion includes a metal pattern; and
a printed circuit board or a data driver, which is connected with the pad portion,
wherein the transistor comprises:
a semiconductor layer disposed on the substrate; and
a source electrode or a drain electrode which is electrically connected with the semiconductor layer,
wherein the source electrode or the drain electrode comprises:
a first layer including a first metal;
a second layer including a second metal; and
a third layer including the first metal,
wherein the metal pattern includes the first metal, and is connected with the printed circuit board or the data driver, and
wherein the metal pattern consists of:
a first sub-metal pattern including the first metal; and
a second sub-metal pattern including the second metal,
wherein a thickness of the second sub-metal pattern is thinner than a thickness of the second layer.