Patent ID: 11961918
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 18:
19. The semiconductor device according to claim 18,
wherein the second conductive layer and the third conductive layer each comprises a first conductive film, a second conductive film, and a third conductive film,
wherein the first conductive film comprises a portion in contact with the semiconductor layer,
wherein the second conductive film is provided over the third conductive film,
wherein the third conductive film is provided to cover a top surface and a side surface of the second conductive film and comprises a portion in contact with the first conductive film,
wherein the first conductive film and the second conductive film contain metal elements different from each other, and
wherein the second conductive film and the third conductive film contain metal elements different from each other.