Patent ID: 7579661

Claim:
A semiconductor device comprising: a gate electrode; and a gate insulating film for insulating the gate electrode, the gate, insulating film being formed of an insulative inorganic material as a main material, the insulative inorganic material containing silicon and oxygen, the insulating film containing hydrogen atoms, and the gate insulating film including Si—O(H)—Si structures therein; wherein the average thickness of the gate insulating film is 10 nm or less, and the absorbance of infrared radiation of which wave number is in the range of 3200 to 3500 cm −1 , which is derived from an OH structure of any of the Si—O(H)—Si structures existing in the gate insulating film, is 0.02 or less when the gate insulating film to which an electric field has never been applied is measured with Multi-Reflection Attenuated Total Reflection Method at room temperature.