Patent ID: 11888071
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A semiconductor device comprising:
a pixel comprising a transistor and a capacitor,
wherein the transistor comprises:
a first conductive film, the first conductive film being configured to be a gate electrode;
a first insulating film positioned over the first conductive film, the first insulating film being configured to be a gate insulating film;
a first oxide semiconductor film positioned over the first insulating film;
a second conductive film in contact with a first region of a top surface of the first oxide semiconductor film;
a third conductive film in contact with a second region of the top surface of the first oxide semiconductor film;
a second insulating film in contact with a third region of the top surface of the first oxide semiconductor film, a top surface of the second conductive film, and a top surface of the third conductive film;
a third insulating film in contact with a top surface of the second insulating film;
a fourth conductive film partly in contact with a top surface of the third insulating film and the top surface of the second conductive film, the fourth conductive film being configured to have a light-transmitting property and be a pixel electrode,

wherein the capacitor comprises:
a second oxide semiconductor film;
the third insulating film positioned over the second oxide semiconductor film and in contact with a top surface of the second oxide semiconductor film; and
the fourth conductive film positioned over the third insulating film,

wherein the second oxide semiconductor film has a larger area than the first oxide semiconductor film in a plan view,
wherein the first oxide semiconductor film and the second oxide semiconductor film each comprises a region in contact with a top surface of the first insulating film,
wherein the second insulating film is partly in contact with the first insulating film,
wherein the second insulating film is partly in contact with the top surface and a side surface of the second oxide semiconductor film,
wherein the first conductive film comprises at least one of copper, titanium, and molybdenum,
wherein the second conductive film and the third conductive film each comprises at least one of copper, titanium, and molybdenum, and
wherein the first oxide semiconductor film and the second oxide semiconductor film each comprises indium, gallium, and zinc.