Patent ID: 6368910
Filing Date: 2002-04-09
Classification: H01L

Abstract:
A method for fabricating a semiconductor device containing a capacitor, comprising the steps of:(a) forming a first dielectric layer on a wafer surface, said wafer including an electrically conductive device area; (b) forming at least one through opening in said first dielectric layer, said through opening being in contact with said electrically conductive device area; (c) forming a ruthenium based plug in said through opening, wherein said ruthenium based plug being made of ruthenium metal, conductive ruthenium oxide, or a stack of conductive ruthenium oxide and ruthenium metal; and (d) forming a capacitor, said capacitor having a bottom electrode which is in contact with said ruthenium based plug so that said capacitor is electrically connected to said electrically conductive device area through said ruthenium based plug.