Patent ID: 9716182
Date: 2017-07-25
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a gate electrode; a gate insulating film over the gate electrode; a first oxide semiconductor film overlapping with the gate electrode; a source electrode and a drain electrode being in contact with the first oxide semiconductor film; and an oxide film over the first oxide semiconductor film, the source electrode, and the drain electrode, wherein the gate insulating film is between the first oxide semiconductor film and the gate electrode, wherein an end portion of the first oxide semiconductor film is spaced from an end portion of the source electrode or the drain electrode in a channel width direction, wherein a width of the first oxide semiconductor film in the channel width direction is larger than a width of the source electrode or the drain electrode in the channel width direction, wherein the first oxide semiconductor film and the oxide film each comprise a metal oxide comprising In, and wherein a conductivity of the oxide film is lower than a conductivity of the first oxide semiconductor film.