Patent ID: 8822989
Filing Date: 2014-09-02
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first conductive film and a second conductive film over an insulating surface; a semiconductor film comprising an oxide semiconductor over and in contact with the first conductive film, and the second conductive film; a third conductive film over and in contact with the first conductive film; a fourth conductive film over and in contact with the second conductive film; an insulating film over the semiconductor film, the third conductive film, and the fourth conductive film; and a fifth conductive film provided in a position overlapping with the semiconductor film over the insulating film, wherein a length of the semiconductor film in a channel width direction is smaller than a length of each of the first conductive film and the second conductive film in the channel width direction, and wherein the length of the semiconductor film in the channel width direction is larger than a length of each of the third conductive film and the fourth conductive film in the channel width direction.