Patent ID: 7888253
Filing Date: 2011-02-15
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, comprising: forming a precursor film containing a predetermined metallic element on a surface of a recess portion formed in an insulating film on a semiconductor substrate; forming a wiring formation film on the precursor film; performing a heat treatment in an oxidation ambient atmosphere to cause the precursor film and the insulating film to react with each other, thereby forming a self-formed barrier film containing a compound which contains the predetermined metallic element and a constituent element of the insulating film as a basic constituent in a boundary between the precursor film and the insulating film, and moving an unreacted predetermined metallic element into the wiring formation film through diffusion to cause the unreacted predetermined metallic element to react with oxygen contained in the oxidation ambient atmosphere, thereby precipitating an unreacted metallic oxide film including the predetermined metallic element to a surface of the wiring formation film; removing the unreacted metallic oxide film; forming the same material as that of the wiring formation film on the wiring formation film after removing; and flattening the wiring formation film until a portion of the insulating film located outside the recess portion is exposed.