Patent ID: 6372630
Filing Date: 2002-04-16
Classification: H01L

Abstract:
A method for fabricating a semiconductor device having first and second conductive layers which are electrically connected to each other through a contact plug, comprising the steps of:forming a first insulating film on said first conductive layer; forming a second insulating film on said first insulating film; forming first and second openings, which exposes a part of a surface of said first conductive layer, in said first and second insulating films, respectively; forming a high-melting-point metallic layer containing a metal having a high melting point on said second insulating film to bury said first and second openings; forming said contact plug by polishing said high-melting-point metallic layer using said second insulating film as a stopper film to leave said high-melting-point metallic layer within said first and second openings; and forming said second conductive layer on a surface of said second insulating film and on a surface of said contact plug.