Patent ID: 6033919
Filing Date: 2000-03-07
Classification: H01L

Abstract:
A method of forming a microelectronic device on a semiconductor substrate, said method comprising the steps of:forming a first layer overlying said substrate and comprising an insulating bottom sublayer and a sacrificial top sublayer;anisotropicaily etching a pattern in said top sublayer, thereby creating an aperture having a substantially vertical sidewall extending through said top sublayer;depositing a substantially conformal perovskite-phase dielectric film over said first layer, said film having an inner surface in contact with said sidewall and an outer surface;extending said aperture through said bottom sublayer;depositing a first conductive electrode within said aperture, thereby forming a conductive plug electrically contacting said substrate and said outer surface of said dielectric layer;removing said sacrificial top sublayer in contact with said dielectric film thereby exposing said inner surface of said dielectric layer; anddepositing a second conductive electrode electrically contacting said inner surface of said dielectric layer;whereby said plug, said dielectric film, and said second conductive electrode complete a capacitive structure having two electrodes and an intervening dielectric wherein said dielectric is formed prior to formation of either electrode.