Patent ID: 6559025
Filing Date: 2003-05-06
Classification: H01L

Abstract:
A method for manufacturing a capacitor of a semiconductor device comprising:forming a first insulating layer having a contact hole over a semiconductor substrate; forming a diffusion barrier layer in the contact hole, wherein the diffusion barrier layer electrically connects to the semiconductor substrate; forming a second insulating layer and a third insulating layer sequentially on the first insulating layer, wherein a hole in the second and third insulating layers exposes the diffusion barrier layer; forming a conductive layer that covers inner walls of the hole in the second and third insulating layers; forming a fill layer that fills a remainder of the hole covered by the conductive layer; removing upper portions of the fill layer and the conductive layer to expose the third insulating layer and leave a storage node of a capacitor; removing the third insulating layer, whereupon removal of the third insulating layer leaves an outer surface of the storage node with a uniform surface morphology; forming a dielectric layer that covers the second insulating layer and remaining portions of the fill layer and the conductive layer; and forming a plate node on the dielectric layer.