公开(公告)号：US20230255059A1

公开(公告)日：2023-08-10

申请号：US17982322

申请日：2022-11-07

Applicant: LG Display Co., Ltd.

Inventor： Hyunseok Na ,  JaeJun Ahn ,  DongSeok Park ,  Hyoungsun Park ,  Heungso Ku ,  ChangSuk Hyun ,  Sanggil Kim ,  Kyoungjin Ahn ,  Pyungho Choi ,  Hyunchyol Shin ,  Seongsoo Cho

IPC: H01L27/32 ,  H01L51/00

CPC classification number: H01L27/3262 ,  H01L27/3272 ,  H01L51/0097 ,  H01L2251/5338 ,  H01L27/1225

Abstract: An organic light-emitting diode (OLED) display device using hybrid type thin-film transistors (TFTs) is disclosed. The OLED display device includes an etch stopper film on a semiconductor pattern to prevent over etching of the semiconductor pattern located on a lower position and source and drain electrodes are brought in direct contact with the semiconductor pattern while passing through the etch stopper film to prevent malfunction of the TFTs due to surface resistance due to the etch stopper film. Thus, characteristics of the TFTs and process stability are secured.