US 12,156,444 B2
Display apparatus including pad unit having plurality of conductive layers with multiple openings
Shinhyuk Yang, Yongin-si (KR); Donghan Kang, Yongin-si (KR); Soonwook Hong, Yongin-si (KR); Yujin Kim, Yongin-si (KR); Jeehoon Kim, Yongin-si (KR); and Hanhee Yoon, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Sep. 7, 2021, as Appl. No. 17/447,046.
Claims priority of application No. 10-2020-0171448 (KR), filed on Dec. 9, 2020.
Prior Publication US 2022/0181427 A1, Jun. 9, 2022
Int. Cl. H10K 50/84 (2023.01); H10K 59/12 (2023.01); H10K 59/13 (2023.01); H10K 59/131 (2023.01); H10K 50/844 (2023.01); H10K 59/121 (2023.01)
CPC H10K 59/131 (2023.02) [H10K 50/844 (2023.02); H10K 59/1201 (2023.02); H10K 59/1216 (2023.02)] 14 Claims
OG exemplary drawing
 
1. A display apparatus comprising:
a substrate comprising a display area, and a peripheral area; and
a pad unit at the peripheral area, the pad unit comprising:
a first conductive layer;
a second conductive layer on the first conductive layer, and having a first opening;
a third conductive layer on the second conductive layer, and having a second opening overlapping with the first opening, the second opening having an area less than an area of the first opening at a top surface of the second conductive layer;
an organic protective layer filling the first opening, and having a third opening overlapped by the second opening; and
an additional metal layer covering a top surface of the first conductive layer exposed through the first opening, an inner surface of the second opening, an inner surface of the third opening, and a portion of a top surface of the third conductive layer.