Method for fabricating a semiconductor component including a high capacitance per unit area capacitor

Abstract

A method is provided for fabricating a semiconductor component that includes a capacitor having a high capacitance per unit area. The component is formed in and on a semiconductor on insulator (SOI) substrate having a first semiconductor layer, a layer of insulator on the first semiconductor layer, and a second semiconductor layer overlying the layer of insulator. The method comprises forming a first capacitor electrode in the first semiconductor layer and depositing a dielectric layer comprising BaCaTiZrOoverlying the first capacitor electrode. A conductive material is deposited and patterned to form a second capacitor electrode overlying the dielectric layer, thus forming a capacitor having a high dielectric constant dielectric. An MOS transistor in then formed in a portion of the second semiconductor layer, the MOS transistor, and especially the gate dielectric of the MOS transistor, formed independently of forming the capacitor and electrically isolated from the capacitor.