Patent ID: 8133779
Filing Date: 2012-03-13
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, comprising: forming an interlayer insulating film; forming a recess in the interlayer insulating film; forming a conductive film extending from a bottom and a sidewall of the recess onto a top surface of the interlayer insulating film such that a shape of an inner surface of the conductive film conforms with that of the recess; and selectively removing a portion of the conductive film formed on the top surface of the interlayer insulating film by dry etching such that a portion of the conductive film remains on the bottom and sidewall of the recess, wherein the dry etching is performed with forming a deposition film directly onto the inner surface of the conductive film including the bottom of the recess and with leaving a space surrounded by the deposition film in the recess such that a diameter of the space in an upper portion of the recess is smaller than a diameter of the space in a lower portion of the recess.