Patent ID: 6184074
Filing Date: 2001-02-06
Classification: H01L

Abstract:
A method for forming a high dielectric constant (HDC) capacitor comprising the steps of:forming a temporary dielectric layer over a structure for which the capacitor is desired;forming a pattern over the temporary dielectric layer, said pattern exposing portions of the temporary dielectric layer over a storage node area where a bottom electrode of the capacitor is desired;etching said temporary dielectric layer using said pattern to remove said temporary dielectric layer in said storage node area;removing said pattern;forming a conductive base in said storage node area;removing said temporary dielectric layer;forming a diffusion barrier on the sidewalls of said conductive base;forming an oxygen stable layer on the sidewalls of said diffusion barrier, wherein said diffusion barrier prevents said oxygen stable layer from reacting with said conductive base and prevents said conductive base from oxidizing;forming a HDC dielectric over the conductive base and oxygen stable layer; andforming an upper electrode over the HDC dielectric.