Patent ID: 6383886
Filing Date: 2002-05-07
Classification: H01L

Abstract:
A method for fabricating a dual-sided container capacitor comprising the steps of:forming an insulative material layer over a substrate, said insulative layer having an upper surface and a container opening; forming a first conductive layer over the insulative material layer and within said container opening of said insulative material layer by depositing a layer of in situ doped polysilicon over said insulative material layer and depositing a layer of hemispherical grained polysilicon over said layer of doped polysilicon, wherein said layer of doped polysilicon and said layer of hemispherical grained polysilicon are subsequently heated; providing a fill layer material over the first conductive layer and within said container opening of said insulative material layer; removing upper portions of the fill layer material and the first conductive layer down to at least the upper surface of the insulative material, while leaving fill layer material within the container opening; removing the fill layer material from the container opening; subsequently removing at least a portion of the insulative material from contacting the first conductive layer outside the container opening; forming a dielectric layer on said first conductive layer; forming a second conductive layer on said dielectric layer; and electrically isolating said second conductive layer from the top electrode of an adjacent capacitor, which is on the opposite side of a bit line.