Patent ID: 6238968
Filing Date: 2001-05-29
Classification: H01L

Abstract:
A method for fabricating a cylindrical capacitor having HSG silicon on inner surface of a storage node of the cylindrical capacitor, comprising:forming a cylindrical storage node in a first insulating layer that is formed on an integrated circuit substrate;forming HSG silicons on an inner surface of the storage node;forming an HSG silicon protection layer;forming a planarization layer on the first insulating layer to completely fill the interior cylinder;planarization etching the planarization layer down to a top surface of the first insulating layer;removing the remainder of the planarization layer from the interior cylinder;forming a thin second insulating layer on the HSG silicon protection layer;forming an oxide layer on the thin second insulating layer and completing a dielectric film of a nitride/oxide; andforming a plate node on the dielectric film to complete the capacitor.