Patent ID: 7678633

Claim:
A method for forming substrates for MOS (metal oxide semiconductor) transistor, comprising the following steps: (A) in a reduced-pressure environment having a pressure lower than 1×10 −6 Torr, a base for accomplishing the surface reconstruction and a solid-state metal oxide source is provided, wherein the solid-state metal oxide source is chosen from the group consisting of the following: hafnium oxide, aluminum oxide, scandium oxide, yttrium oxide, titanium oxide, gallium gadolinium oxide and metal oxides of rare earth elements; and (B) in one step process, vaporize the solid-state metal oxide source in order to make the solid-state metal oxide source become a metal oxide molecular beam and, in a operating temperature that is required for achieving an amorphous state of the solid-state metal oxide films, deposit on the base a first metal oxide film having an amorphous state so as to further fabricate a substrate for MOS transistors.