Patent ID: 11963374
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 11:
12. A semiconductor device comprising:
a first transistor; and
a second transistor,
wherein a channel formation region of the first transistor comprises silicon,
wherein a channel formation region of the second transistor comprises an oxide semiconductor,
wherein a first insulating layer is provided over the channel formation region of the first transistor,
wherein a first gate electrode of the first transistor is provided over the first insulating layer,
wherein the first gate electrode of the first transistor is electrically connected to one of a source and a drain of the second transistor via a first opening in a second insulating layer, a second opening in a third insulating layer, a third opening in a fourth insulating layer, a fourth opening in a fifth insulating layer, a fifth opening in the fifth insulating layer, and a sixth opening in the fourth insulating layer,
wherein the fourth insulating layer is in contact with a side surface of a layer which comprises the oxide semiconductor and a top surface of the layer which comprises the oxide semiconductor,
wherein a second gate electrode of the second transistor is provided below the channel formation region of the second transistor, and
wherein, in a cross-sectional view, the layer which comprises the oxide semiconductor extends beyond an end portion of the second gate electrode.