Patent ID: 11869979
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device comprising a transistor, the transistor comprising:
a first insulator;
a second insulator over the first insulator;
a first oxide over the second insulator;
a second oxide over the first oxide;
a third oxide over the second oxide;
a first conductor and a second conductor over the second oxide;
a third insulator over the third oxide; and
a third conductor over the third insulator;
wherein in a channel width direction of the transistor, with reference to a height of a bottom surface of the first insulator, a height of a bottom surface of the third conductor in a region where the third conductor and the second oxide do not overlap with each other is lower than a height of a bottom surface of the second oxide, and
wherein in the channel width direction of the transistor, at least part of the third oxide in a region where the third oxide and the second oxide do not overlap with each other is in contact with the first insulator.