Patent ID: 7129131

Claim:
A method for fabricating a capacitor of a semiconductor device, comprising the steps of: forming a plurality of storage node contact plugs on a substrate such that each storage node contact plug is isolated by a first inter-layer insulation layer; depositing a barrier layer, a second inter-layer insulation layer for forming a lower electrode and a hard mask on an entire surface of a substrate structure; forming holes for use in the lower electrode by etching the barrier layer and the second inter-layer insulation layer for forming the lower electrode with use of the hard mask as an etch mask, each hole having a circular shape and exposing one side of each storage node contact plug, wherein the depth of the exposed side of each storage node contact plug is preferably substantially the same as the thickness of the hard mask; performing an etch back process to remove the hard mask and a partial portion of each storage node contact plug exposed within the individual hole for use in the lower electrode; and depositing a material for use in the lower electrode into the removed partial portion of each storage node contact plug.