Patent ID: 6222219
Filing Date: 2001-04-24
Classification: H01L

Abstract:
A crown capacitor structure comprising:a semiconductor substrate;a planarized interlevel dielectric on said semiconductor substrate, said planarized interlevel dielectric including at least one wordline, at least one bitline and at least one bitline contact for contacting said at least one bitline to a diffusion region in said substrate, said planarized interlevel dielectric further comprising a contact hole and adjoining troughs about said contact hole, said adjoining troughs having tapered sidewalls such that a space containing said planarized interlevel dielectric is between said tapered sidewalls of said adjoining troughs and said contact hole thereby forming a crown-like region in said planarized interlevel dielectric; a patterned bottom electrode material which is contained in said contact hole and said adjoining troughs;a node dielectric material on said patterned bottom electrode material and said interlevel dielectric; anda plate electrode on said node dielectric material.