Patent ID: 7332394

Claim:
A method of forming a capacitor device on a semiconductor substrate, comprising the steps of: forming a shallow trench shape comprised with tapered sides, in a hard mask layer and in said semiconductor substrate, filling said shallow trench shape with a first insulator layer resulting in a shallow trench isolation (STI) region, removing a top portion of said first insulator layer from a first section of said STI region exposing a bare top portion of the tapered side of said first section of said STI region, forming a second insulator layer on said bare top portion of said tapered side of said first section of said STI region, performing an ion implantation procedure to form a capacitor region in a first portion of said semiconductor substrate located underlying said second insulator layer, and in a second portion of said semiconductor substrate located adjacent to said first portion of said semiconductor substrate, underlying a hard mask layer, removing said hard mask layer and said second insulator layer, forming a third insulator layer on said bare top portion of said tapered side in said first section of said STI region, and on top surface of said semiconductor substrate, and forming a conductive structure on a second section of said STI region, on a recessed, said first section of said STI region, and on said third insulator layer.