Patent ID: 6790762
Filing Date: 2004-09-14
Classification: H01L

Abstract:
A method of forming an electrical device including providing a substrate having a first dielectric upper layer, forming a depression in said first dielectric upper layer, filling said depression with an electrically conductive film having an electrical resistivity and an upper surface that is co-planar with the first dielectric upper layer, said method comprising:reacting a chemical composition with said upper surface to form a passivating layer over the upper surface, wherein said passivating layer has a thickness of less than about 50 Ã¥, wherein the step of reacting a chemical composition with said upper surface to form a passivating layer comprises: exposing the upper surface to a plasma having a first concentration of a chemical composition used to form the passivation layer; and incrementally reducing the concentration of the chemical composition until it is completely removed from the presence of the upper surface; and forming a second dielectric upper layer over said electrically conductive film and said first dielectric upper layer, wherein: at least an exposed surface of the electrically conductive film is unoxidized; and said second dielectric upper layer is adhered to said electrically conductive film.