Patent ID: 6090702
Filing Date: 2000-07-18
Classification: C23C,H01L

Abstract:
A method for the formation of an embedded electroconductive layer, comprising the steps of:forming an interlayer insulating layer for covering a lower interconnection layer having a first barrier layer as the uppermost layer;forming an opening part in said interlayer insulating layer on said lower interconnection layer;forming a second barrier layer for covering said opening part;etching said second barrier layer thereby removing a surface layer of said second barrier layer so as to result in an appearance of a new surface of said second barrier layer containing oxygen at a lower concentration than said removed layer;growing an electroconductive layer on and in contact with said new surface of said second barrier layer by a chemical vapor deposition method using a metallic precursor thereby embedding said electroconductive layer in said opening part; andforming a third barrier layer of an upper interconnection layer on said electroconductive layer.