Patent ID: 6100155
Filing Date: 2000-08-08
Classification: H01L

Abstract:
A method for fabricating a metal-oxide-metal capacitor comprising:providing a first insulating layer overlying a semiconductor substrate;forming a conducting line on the surface of said first insulating layer;depositing a second insulating layer overlying said conducting line;etching through said second insulating layer to form contact/via openings to said conducting line;filling said contact/via openings with metal plugs wherein said metal plugs form the bottom plate electrode of said capacitor;etching into said second insulating layer surrounding said metal plugs so that said metal plugs protrude from said second insulating layer wherein a trench is formed surrounding said metal plugs;thereafter depositing a capacitor dielectric layer over the surface of said second insulating layer and said metal plugs;depositing a barrier metal layer overlying said capacitor dielectric layer; anddepositing a metal layer overlying said barrier metal layer and patterning said metal layer and said barrier metal layer wherein said metal layer forms the upper plate electrode of said capacitor completing said fabrication of said metal-oxide-metal capacitor.