Patent ID: 11961894
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device comprising:
a semiconductor layer comprising a channel formation region;
a first electrode electrically connected to the semiconductor layer;
a first insulating film over the semiconductor layer and the first electrode;
a second electrode overlapping with the channel formation region with the first insulating film interposed therebetween;
a third electrode having a region in contact with a top surface of the first insulating film and a region in contact with a bottom surface of the second electrode;
a second insulating film over the second electrode and the third electrode;
a fourth electrode over and in contact with the second insulating film, the fourth electrode having a region overlapping with the channel formation region with the second electrode interposed therebetween; and
a fifth electrode over and in contact with the second insulating film, the fifth electrode having the same material as the fourth electrode,
wherein the second electrode has a region overlapped with the fifth electrode,
wherein the fourth electrode is in contact with the first electrode through an opening provided in the second insulating film,
wherein the opening does not overlap with the semiconductor layer,
wherein each of the second electrode and the fourth electrode has a light-transmitting property, and
wherein the third electrode has a light-blocking property.