Patent ID: 7795137
Filing Date: 2010-09-14
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device having a process of embedding a conductive film mainly composed of tungsten inside a groove formed in a silicon wafer and a silicon oxide film on the silicon wafer, the method comprising the steps of: (a) depositing a first titanium nitride film covering at least a surface of the silicon oxide film by a sputtering method after forming the groove in the silicon wafer and the silicon oxide film on the silicon wafer; (b) depositing a titanium film covering a surface of the first titanium nitride film and a surface of the silicon wafer exposed inside the groove and having a film thickness equal to or less than half of a diameter of the groove; (c) depositing a second titanium nitride film covering a surface of the titanium film and having a total film thickness of the second titanium nitride film and the titanium film equal to or less than half of the diameter of the groove; and (d) depositing a tungsten film to be embedded inside of the groove after the step (c).