Method for fabricating conductive line pattern for semiconductor device

Abstract

A method for fabricating a conductive line pattern for a semiconductor device including the steps of: forming a gate insulation film on the upper surface of a semiconductor substrate; forming a polysilicon layer on the upper surface of the gate insulation film; forming a WNx film on the upper surface of the polysilicon layer; forming a first insulation film on the upper surface of the WNx film; patterning the first insulation film, the WNx film and the polysilicon layer, to form a conductive line pattern; and selectively oxidizing the polysilicon layer. With the method, in view of forming the conductive line pattern in the WNx/poly-Si structure, the thermal treatment processes are reduced in number, so that the thermal stress applied to the conductive line pattern is diminished, and thus, a reliability of the semiconductor device is improved. In addition, as the thermal treatment processes are reduced in number, the processes are simplified, and accordingly a time required for fabricating the conductive line pattern of the semiconductor is decreased.

Dependencies are inferred from the claim text.