Patent ID: 6091098
Filing Date: 2000-07-18
Classification: H01L

Abstract:
A capacitor comprising:a storage node connecting to a semiconductor substrate through a dielectric layer formed upon said semiconductor substrate, said dielectric layer having a first rugged surface uncovered from the dielectric layer, said storage node comprising:a base member providing a conductive communication to an underlying conductive region of said semiconductor substrate through said dielectric layer, said base member including two lateral ends;two vertical members respectively extending upwardly from said two lateral ends of said base member, each of said two vertical members including sides and top ends, said vertical members having a second rugged surface thoroughly distributing over each of said sides of said vertical members;two horizontal members respectively and outwardly extending from said two top ends of said two vertical members, each of said two horizontal members including sides and a bottom face, said horizontal members having a third rugged surface thoroughly distributing over each of said sides, including said bottom face, of each of said horizontal members; andtwo sidewall members respectively and upwardly extending from two outward ends of said two horizontal members, each of said sidewall members having sides, said sidewall members having a fourth rugged surface thoroughly distributing over each of said sides of said sidewall members;a dielectric layer on said storage node; anda conductive layer on said dielectric layer.