Patent ID: 6849539
Filing Date: 2005-02-01
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a metal film and a first silicon nitride film laminated in this order over a semiconductor substrate on an insulating film; processing said first silicon nitride film and said metal film into a wiring pattern to form wires; depositing a second silicon nitride film on the entire surface such that said second silicon nitride film is applied to a top face and a side face of said first silicon nitride film processed into said wiring pattern, and side faces of said wires, and over the semiconductor substrate between said wires; forming a silicon interlayer insulating film of an oxide film to cover said second silicon nitride film; and forming a contact hole which reaches a surface of said semiconductor substrate between wires of said wiring pattern, comprising: wherein at least the dry etching of said silicon interlaver insulating film is performed with a nitrogen-containing gas added to a reactant gas comprising a fluorocarbon gas, a ratio of nitrogen to the reactant gas being 0.8 or more.