Patent ID: 9455349
Filing Date: 2016-09-27
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first electrode; a second electrode over the first electrode; a first insulating layer in contact with side surfaces of the first electrode and the second electrode; a second insulating layer in contact with a top surface of the first insulating layer and part of a top surface of the second electrode, the second insulating layer having an opening in a region overlapping with the second electrode; a third insulating layer over the second electrode and the second insulating layer, wherein the third insulating layer is in contact with the second electrode through the opening of the second insulating layer; an oxide semiconductor layer overlapping with the first electrode and the second electrode with the third insulating layer sandwiched between the second electrode and the oxide semiconductor layer; a fourth insulating layer over the oxide semiconductor layer; and a third electrode over the oxide semiconductor layer with the fourth insulating layer therebetween, wherein the third electrode overlaps with the opening of the second insulating layer at least partly.