Patent ID: 7718478
Filing Date: 2010-05-18
Classification: H01L

Abstract:
1. A manufacturing method for a field-effect transistor, comprising: forming a first insulation film over a crystalline semiconductor; patterning the first insulation film to form a gate insulation film over a portion of the crystalline semiconductor; introducing an impurity having one conductivity type to the crystalline semiconductor with the gate insulation film as a mask; oxidizing a surface of the crystalline semiconductor with an oxidizing water solution to form an oxide film; forming a conductive film on the oxide film and the gate insulation film; patterning the conductive film to form a gate electrode, a source electrode, a drain electrode; and heating the crystalline semiconductor, the oxide film, the gate insulation film, the gate electrode, the source electrode, and the drain electrode in an inert gas ambient at a temperature of from 800° to 1050° for a time period of from 30 minutes to 4 hours.