Patent ID: 11950455
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A transistor substrate comprising:
a substrate including a first region and a second region;
a first buffer layer on top of and contacting the substrate in the first region;
a second buffer layer on top of and contacting the first buffer layer in the first region and on top of and contacting the substrate in the second region;
a first transistor in the first region on the second buffer layer and including a first oxide semiconductor layer and a first gate electrode overlapping the first oxide semiconductor layer; and
a second transistor in the second region on the second buffer layer and including a second oxide semiconductor layer and a second gate electrode overlapping the second oxide semiconductor layer,
wherein the first buffer layer in the first region has a hydrogen concentration that is higher than a hydrogen concentration of the second buffer layer in the second region.