Patent ID: 7692264

Claim:
A semiconductor device, comprising: a semiconductor substrate having active regions and isolating regions; an isolating film formed at the isolating regions of the semiconductor substrate; a gate insulating film formed at the active regions of the semiconductor substrate comprising: an opening having a predetermined width, and insulating films formed at both sides of the opening for maintaining a vacuum condition in an inside of the opening or gas injected into the inside of the opening; a gate electrode formed on the opening and insulating films for maintaining a vacuum condition in the inside of the opening or the gas injected into the inside of the opening; and lightly doped drain regions and source/drain impurity regions formed in the surface of the semiconductor substrate at both sides of the gate electrode, wherein the opening forms a vacuum condition or is filled with a gas, and the insulating films being formed at the both sides of the opening maintain the vacuum condition of the opening or the gas filling of the opening.