Patent ID: 6891269
Filing Date: 2005-05-10
Classification: C23C,H01L

Abstract:
1. An embedded electroconductive layer comprising: an opening part or a depressed part formed in an insulating film on a substrate; a barrier layer covering said opening part or said depressed part; a metal growth promoting layer formed directly on said barrier layer, said metal growth promoting layer being made of a refractory metal nitride different from a material of said barrier layer, and an electroconductive layer embedded in said opening part or said depressed part via said barrier layer and said metal growth promoting layer, said electroconductive layer being formed of a Cu layer, an Al layer or an Al alloy having Al as a main component thereof, and said electroconductive layer being formed on and in contact with said metal growth promoting layer; wherein said metal growth promoting layer is a TiN layer containing oxygen at a lower concentration than said barrier layer.