Patent ID: 9711537
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A display device comprising: a transistor comprising: a second insulating film over the first conductive film and the third oxide film; a second conductive film over the second insulating film; and a connection portion comprising: wherein the second conductive film is electrically connected to the first conductive film through a first opening provided in the second insulating film, wherein the fourth conductive film is electrically connected to the third conductive film through a second opening provided in the second insulating film, wherein the first conductive film comprises the same material as the third conductive film, wherein the second conductive film comprises the same material as the fourth conductive film, wherein an atomic ratio of components in the first oxide film is different from an atomic ratio of components in the second oxide film, and wherein an atomic ratio of components in the third oxide film is different from the atomic ratio of components in the second oxide film.