Patent ID: 11935964
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A semiconductor device comprising:
a first insulator;
a first oxide semiconductor over the first insulator;
a second oxide semiconductor over the first oxide semiconductor;
a first conductor as a source electrode or a drain electrode over and in contact with the second oxide semiconductor;
a second insulator in contact with a top surface and a side surface of the first conductor;
a second conductor as a gate electrode embedded in an opening of the second insulator; and
a third insulator over the second conductor,
wherein the first conductor includes nitrogen and tantalum,
wherein the first conductor has a physical property of extracting hydrogen,
wherein the first conductor includes a region having a hydrogen concentration higher than or equal to 2.0×1019 atoms/cm3 and lower than or equal to 1.0×1021 atoms/cm3, and
wherein at least part of hydrogen atoms included in the region is bonded to a nitrogen atom.