Patent ID: 9653613
Date: 2017-05-16
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: an oxide semiconductor over a substrate; a first conductor in contact with at least part of a top surface of the oxide semiconductor; a second conductor in contact with at least part of the top surface of the oxide semiconductor; a first insulator over the first conductor and the second conductor, and in contact with at least part of the top surface of the oxide semiconductor; a second insulator over the first insulator; a third conductor over the second insulator; and a third insulator over the third conductor, wherein the third conductor overlaps with at least part of the first conductor with the first insulator and the second insulator positioned therebetween, and overlaps with at least part of the second conductor with the first insulator and the second insulator positioned therebetween, wherein the first insulator contains oxygen, wherein the second insulator transmits less oxygen than the first insulator, wherein the third insulator transmits less oxygen than the first insulator, and wherein the second insulator contains gallium and oxygen.