Patent ID: 6022805
Filing Date: 2000-02-08
Classification: C23C,H01L

Abstract:
A method of fabricating a semiconductor device, comprising the steps of:forming an interlayer insulating film on a conductive material layer, and forming a contact hole facing said conductive material layer in said interlayer insulating film;removing native oxide which is formed on the surface of said conductive material layer and exposed at the bottom portion of said contact hole; andforming either a contact plug or an upper layer interconnection at least in said contact hole;wherein said native oxide is removed by sputter etching using an incident ion energy having an intensity more than a value allowing said native oxide to be removed by sputter etching and less than a value allowing a side surface of said contact hole to be sputtered and re-deposited on the surface of said conductive material layer exposed at the bottom portion of said contact hole; andeither said contact plug or said upper layer interconnection is formed in said contact hole continuously after removal of said native oxide without exposing, to an oxidizing atmosphere, the surface of said conductive material layer exposed at the bottom portion of said contact hole.