Patent ID: 6417085
Filing Date: 2002-07-09
Classification: H01L

Abstract:
A method of forming a field effect transistor gate construction comprising:forming a SiO2 comprising layer over a substrate; depositing a Ta2O5 comprising layer over the substrate to be proximate the SiO2 comprising layer; forming a conductive gate region to be proximate the SiO2 and Ta2O5 comprising layers, the conductive gate region comprising at least two different material layers, one of said at least two comprising a first conductive material, another of said at least two comprising a conductive metal nitride, the forming comprising depositing the conductive metal nitride such that the Ta2O5 comprising layer is received intermediate the SiO2 comprising layer and the conductive metal nitride; patterning at least the conductive gate region into a field effect transistor gate line; and the conductive metal nitride being oxidizable to a dielectric nitride; and further comprising after the patterning, oxidizing laterally opposing outer regions of said oxidizable nitride to form laterally opposed oxidized regions at laterally opposed edges of the gate line.