US 11,856,818 B2
Organic light emitting diode display
Joon Woo Bae, Hwaseong-si (KR); So Young Koo, Yongin-si (KR); Han Bit Kim, Seoul (KR); Thanh Tien Nguyen, Seoul (KR); Kyoung Won Lee, Seoul (KR); Yong Su Lee, Seoul (KR); Jae Seob Lee, Seoul (KR); and Gyoo Chul Jo, Suwon-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Jan. 11, 2022, as Appl. No. 17/572,913.
Application 17/572,913 is a continuation of application No. 16/591,966, filed on Oct. 3, 2019.
Claims priority of application No. 10-2018-0118769 (KR), filed on Oct. 5, 2018.
Prior Publication US 2022/0140038 A1, May 5, 2022
Int. Cl. H10K 59/121 (2023.01); H10K 50/844 (2023.01); H10K 59/126 (2023.01); H10K 59/131 (2023.01); H01L 29/786 (2006.01); H01L 27/12 (2006.01)
CPC H10K 59/1213 (2023.02) [H10K 50/844 (2023.02); H10K 59/126 (2023.02); H10K 59/1216 (2023.02); H10K 59/131 (2023.02); H01L 27/124 (2013.01); H01L 27/1225 (2013.01); H01L 27/1255 (2013.01); H01L 29/7869 (2013.01); H01L 29/78633 (2013.01); H01L 29/78675 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An organic light emitting diode display, comprising:
a substrate;
a first buffer layer on the substrate;
a first semiconductor layer on the first buffer layer;
a first gate insulating layer on the first semiconductor layer;
a first gate electrode on the first gate insulating layer;
a second gate insulating layer on the first gate electrode;
a second gate electrode and a blocking layer on the second gate insulating layer;
a second buffer layer on the second gate electrode and the blocking layer;
a second semiconductor layer on the second buffer layer, the second semiconductor layer including a channel region;
a third gate insulating layer on the second semiconductor layer; and
a third gate electrode on the third gate insulating layer, wherein
the blocking layer is disposed in a same layer as the second gate electrode, the blocking layer overlapping the channel region of the second semiconductor layer in a direction perpendicular to a surface of the substrate.