Patent ID: 9012910
Filing Date: 2015-04-21
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a gate electrode provided on the substrate; a gate insulating film formed on the gate electrode; an islanded oxide semiconductor layer formed on the gate insulating film and including a channel region and first and second contact regions that are arranged to interpose the channel region between them; a source electrode electrically connected to the first contact region; a drain electrode electrically connected to the second contact region; and a protective film formed on and in contact with the oxide semiconductor layer and arranged between the oxide semiconductor layer and the source and drain electrodes, wherein the upper and side surfaces of the oxide semiconductor layer are covered with the source electrode, the drain electrode and the protective film, and when viewed along a normal to the substrate, a narrowest gap between the respective outer peripheries of the first contact region and the source electrode and a narrowest gap between the respective outer peripheries of the second contact region and the drain electrode both have a length of 1.5 μm to 4.5 μm.