Patent ID: 6171898
Filing Date: 2001-01-09
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 for 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;depositing an oxygen stable material over said temporary dielectric layer and said structure;removing said oxygen stable material from over said temporary dielectric layer, leaving said oxygen stable material in said storage node area;removing said temporary dielectric layer;forming a HDC dielectric over the oxygen stable material; andforming an upper electrode over the HDC dielectric.