Patent ID: 7547598

Claim:
A method for fabricating a capacitor in a semiconductor device, the method comprising: forming storage node contact plugs on a substrate; forming an insulation layer over the resultant structure; forming trenches exposing the storage node contact plugs by patterning the insulation layer; forming a conductive layer over the insulation layer and in the trenches; forming a photoresist pattern in the trenches to fill the trenches; etching the conductive layer formed on the insulation layer by performing an etch-back process to form storage nodes in the trenches and form a residue on the insulation layer; forming a plasma barrier layer over the insulation layer and the storage nodes to cover the residue; forming a capping layer over the plasma barrier layer and filled in the trenches; removing the capping layer and the plasma barrier layer containing the residue; and forming a dielectric layer and a plate electrode over the storage nodes.