Patent ID: 11934243
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 3:
4. A semiconductor device comprising:
a CPU comprising a memory circuit; and
a switch between the CPU and a power source,
wherein the switch is electrically connected to a controller,
wherein the memory circuit comprises a first transistor which comprises an oxide semiconductor layer in a channel formation layer,
wherein the CPU comprises a second transistor which comprises a single crystal silicon layer in a channel formation layer,
wherein one of a source and a drain of the first transistor is electrically connected to a gate of the second transistor,
wherein the first transistor is stacked over the second transistor with an insulating layer therebetween,
wherein a first conductive layer functioning as the one of the source and the drain of the first transistor is in contact with a top surface of a second conductive layer functioning as the gate of the second transistor through an opening of the insulating layer, and
wherein the oxide semiconductor layer comprises indium.