Patent ID: 9379136
Filing Date: 2016-06-28
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a substrate; a first wiring layer; a first insulating film over the substrate; an oxide semiconductor layer over the first insulating film; a second wiring layer over and in contact with the oxide semiconductor layer; and a second insulating film over and in contact with the oxide semiconductor layer and the second wiring layer, wherein the first wiring layer and the oxide semiconductor layer overlap with each other, wherein the second wiring layer comprises a first layer, a second layer over the first layer and a third layer over the second layer, wherein an end portion of the first layer, an end portion of the second layer and an end portion of the third layer are not aligned with each other, and wherein the end portion of the second layer is over the first layer, and the end portion of the third layer is over the second layer.