Patent ID: 6127239
Filing Date: 2000-10-03
Classification: H01L

Abstract:
A method of forming a capacitor comprising:providing an insulative substrate having a surface;forming a first opening in the substrate and through the surface;forming a conductive material over the substrate surface and within the first opening, the conductive material being formed to a thickness which less than completely fills the first opening to leave a second opening within the first opening;forming a coating layer over the conductive material and within the second opening;etching the coating layer and the conductive material to remove the coating layer and the conductive material from over the substrate surface and leave the coating layer within the second opening and the conductive material within the first opening, wherein the etching etches the coating layer and the conductive material at about a same rate;after the etching, removing the coating layer from within the second opening to leave the conductive material within the first opening, the conductive material within the first opening defining a storage node;forming a dielectric layer over the storage node;forming a capacitor plate over the dielectric layer; andproviding an electrical node in electrical contact with the storage node.