Patent ID: 6602788
Filing Date: 2003-08-05
Classification: H01L

Abstract:
A process for fabricating an interconnect for contact holes, which comprises:a) forming contact holes in an insulation layer leading to a first interconnect layer, the insulation layer having an insulation surface, the contact holes having a hole surface; b) cleaning the hole surface; c) forming a barrier layer at least on the hole surface; d) forming an AlGeCu-containing second interconnect layer on the insulation surface in a three-stage process by depositing a first AlCu layer, an AlGeCu layer, and a second AlCu layer using a low-temperature PVD process to fill up the contact holes; e) forming and patterning a mask layer on the second interconnect layer; and f) patterning the second interconnect layer by an anisotropic etching process using the mask layer.