US 12,245,462 B2
Display device
Suyeon Yun, Yongin-si (KR); and Okkyung Park, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Dec. 17, 2021, as Appl. No. 17/554,538.
Claims priority of application No. 10-2020-0179920 (KR), filed on Dec. 21, 2020.
Prior Publication US 2022/0199729 A1, Jun. 23, 2022
Int. Cl. H01L 27/32 (2006.01); H10K 59/121 (2023.01); H10K 59/131 (2023.01); H10K 59/88 (2023.01)
CPC H10K 59/1213 (2023.02) [H10K 59/131 (2023.02); H10K 59/88 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate including an opening area, a display area surrounding the opening area, and a non-display area arranged between the opening area and the display area;
a first thin-film transistor arranged on the substrate and including a first semiconductor layer including a silicon semiconductor;
a first insulating layer covering the first semiconductor layer and defining a lower contact hole, the lower contact hole overlapping the non-display area in a plan view;
a second thin-film transistor arranged on the first insulating layer and including a second semiconductor layer including an oxide semiconductor;
a second insulating layer covering the second semiconductor layer and defining an upper contact hole, the upper contact hole overlapping the lower contact hole in the plan view;
a display element overlapping the display area in the plan view and arranged on the second insulating layer;
a lower conductive layer arranged between the substrate and the first insulating layer and overlapping the lower contact hole;
an upper conductive layer arranged on the second insulating layer and connected to the lower conductive layer through the lower contact hole and the upper contact hole;
a first organic insulating layer arranged between the second insulating layer and the display element; and
a second organic insulating layer arranged between the first organic insulating layer and the display element,
wherein the upper conductive layer includes a plurality of first upper conductive layers and a plurality of second upper conductive layers,
the first upper conductive layers are arranged between the second insulating layer and the first organic insulating layer,
the second upper conductive layers are arranged between the first organic insulating layer and the second organic insulating layer, and
the first upper conductive layer and the second upper conductive layer are alternately arranged in a direction from the display area to the opening area.