公开(公告)号：US09748320B2

公开(公告)日：2017-08-29

申请号：US15197351

申请日：2016-06-29

Applicant: LG DISPLAY CO., LTD.

Inventor： Sungki Hong ,  Byungyong Ahn ,  Sangkug Han ,  Seungmin Lee ,  Yujin Choi ,  Sunghoon Hong ,  Youngwoon Yoon

IPC: H01L27/32 ,  H01L29/786 ,  H01L27/12

CPC classification number: H01L27/3248 ,  H01L27/1218 ,  H01L27/1222 ,  H01L27/3232 ,  H01L27/3237 ,  H01L29/78603 ,  H01L29/78609 ,  H01L29/78621 ,  H01L29/78633 ,  H01L29/78648

Abstract: A thin-film transistor substrate and a display device comprising the same are provided which can improve display quality by reducing or preventing deterioration of the characteristics of thin-film transistors. The thin-film transistor substrate comprises thin-film transistors on a lower protective metal layer. Each thin-film transistor comprises a buffer layer, a semiconductor layer, a first insulating film, a gate electrode, a second insulating film, a source electrode and a drain electrode, and a first electrode. The lower protective metal layer is electrically connected to the gate electrode and overlaps the channel region of the semiconductor layer.