Patent ID: 11882376
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 4:
5. An image sensor comprising:
a pixel portion including a first photodiode, a second photodiode, a first transistor electrically connected to one terminal of the first photodiode and one terminal of the second photodiode, and a second transistor electrically connected to the one terminal of the first photodiode,
wherein the other terminal of the first photodiode is electrically connected to a first conductive layer,
wherein one of a source and a drain of the first transistor is electrically connected to a second conductive layer without passing through any transistor,
wherein one of a source and a drain of the second transistor is electrically connected to the second conductive layer without passing through any transistor,
wherein the other of the source and the drain of the first transistor is electrically connected to a fourth conductive layer,
wherein the other of the source and the drain of the second transistor is electrically connected to a third conductive layer without passing through any transistor,
wherein a photoelectric conversion region of each of the first photodiode and the second photodiode is closer to a light incident side than the first conductive layer, the second conductive layer, and the third conductive layer,
wherein the first conductive layer and a gate electrode of the second transistor overlap with each other,
wherein the second conductive layer and the gate electrode of the second transistor do not overlap with each other,
wherein the third conductive layer does not overlap with the photoelectric conversion region of the first photodiode,
wherein the third conductive layer does not overlap with the gate electrode of the second transistor,
wherein a fifth conductive layer and the gate of the second transistor overlap with each other,
wherein the first conductive layer and the fourth conductive layer are positioned at different heights,
wherein the second conductive layer and the third conductive layer are positioned at different heights,
wherein the third conductive layer and the first conductive layer are positioned at different heights,
wherein the third conductive layer and the first conductive layer are positioned at different heights,
wherein the fifth conductive layer and the first conductive layer are positioned at different heights,
wherein the fifth conductive layer and the second conductive layer are positioned at different heights,
wherein the fifth conductive layer and the third conductive layer are positioned at different heights,
wherein the fifth conductive layer and the fourth conductive layer are positioned at different heights,
wherein a width of the first conductive layer is larger than a width of the fourth conductive layer, and
wherein a width of the second conductive layer is larger than a width of the third conductive layer.