Patent ID: 9412876
Filing Date: 2016-08-09
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first transistor in a driver portion over a surface; and a second transistor in a pixel portion over the surface, wherein the first transistor comprises: wherein the second insulating film is a nitride insulating film, wherein each of the first region and the third region of the first oxide semiconductor film is in contact with the second insulating film, wherein the first oxide semiconductor film has a multilayer structure comprising a first oxide semiconductor layer and a second oxide semiconductor layer on and in contact with the first oxide semiconductor layer, wherein a composition of metal elements in the first oxide semiconductor layer is different from a composition of metal elements in the second oxide semiconductor layer, wherein the second transistor comprises: wherein each of the first region and the third region of the second oxide semiconductor film is in contact with the second insulating film, and wherein the first oxide semiconductor film is thicker than the second oxide semiconductor film.