Patent ID: 6482734
Filing Date: 2002-11-19
Classification: H01L

Abstract:
A method of forming a diffusion barrier layer for a semiconductor device having a semiconductor substrate and an insulation layer on said semiconductor substrate, said insulation layer having a contact hole that exposes a portion of said substrate, the method comprising:forming a co-sputtered amorphous or co-sputtered microcrystalline diffusion barrier layer in said contact hole so as to contact said semiconductor substrate and on said insulation layer, said diffusion barrier layer containing at least one refractory metal selected from the group consisting of Ta, Mo and W and also containing an insulating material consisting essentially of an oxide; and annealing said diffusion barrier layer, wherein the insulating material is bonded to the refractory metal in the diffusion barrier layer, and an XRD diffraction angle 2&thgr; of the diffusion barrier layer is stable up to about 800Â° C.