Patent ID: 8278136

Claim:
A method for producing a semiconductor device, the method comprising: forming a gate electrode on a substrate; forming a gate insulation film on the gate electrode; forming an inorganic oxide film precursor on the gate insulation film and applying ultraviolet laser light to the inorganic oxide film precursor to form an inorganic oxide film, the inorganic oxide film being positioned above the gate electrode and having a carrier density of 10 19 /cm 3 or more; forming a source electrode and a drain electrode on a different portion of the inorganic oxide film from each other, wherein the source electrode and the drain electrode are in direct contact with the inorganic oxide film and the source electrode and the drain electrode partially covering the inorganic oxide film so as to expose a region of the inorganic oxide film; and applying an oxidation treatment to the exposed region of the inorganic oxide film thereby the exposed region of the inorganic oxide film to have reduced carrier density of 5×10 16 /cm 3 or less wherein the inorganic oxide film precursor is formed by a liquid phase method from a liquid comprising an organic solvent and at least one material selected from the group consisting of an inorganic oxide particle, an organic precursor and an organic-inorganic composite precursor.