Patent ID: 7507629

Claim:
A method of forming a semiconductor device, the method comprising sequential steps of: providing a semiconductor substrate comprising silicon; forming a gate insulating layer including: forming an oxide layer directly on the substrate, the oxide layer comprising silicon; forming an interfacial dielectric layer directly on the oxide layer opposite the substrate, the interfacial dielectric layer comprising HfO2, ZrO2, a zirconium silicate alloy, and/or a hafnium silicate alloy and having a thickness of between about 0.5 nm and 1.0 nm; and forming a primary dielectric layer directly on the interfacial dielectric layer opposite the substrate, the primary dielectric layer comprising Al03; TiO2; a group IIIB or VB transition metal oxide; a trivalent lanthanide series rare earth oxide; a silicate alloy; an aluminate alloy; a complex binary oxide having two transition metal oxides and/or a complex binary oxide having a transition metal oxide and a lanthanide rare earth oxide, and wherein a thickness of the primary dielectric layer is at least about five times greater than the thickness of the interfacial dielectric layer; wherein the device comprises a field effect transistor, the method further comprising forming a gate layer directly on the primary dielectric layer.