Patent ID: 6340619
Filing Date: 2002-01-22
Classification: H01L

Abstract:
A method of fabricating a capacitor on a substrate, the method comprising the steps of:forming a first insulating layer on the substrate, the first insulating layer having a contact hole over the substrate; forming a first conductive layer in the contact hole and on the first insulating layer; forming a second insulating layer on a portion of the first conductive layer; forming a third insulating layer on the second insulating layer, the third insulating layer having a width wider than the second insulating layer; forming a second conductive layer surrounding the second insulating layer, the second conductive layer contacting the first conductive layer and not having a portion below the first conductive layer, and having only a substantially vertically extended portion, whereby the second conductive layer does not have a sharp edged top surface so that a leakage current around the top surface is suppressed; removing the second and third insulating layers; forming a dielectric layer on surfaces of the first and second conductive layers; and forming a third conductive layer on the dielectric layer.