Patent ID: 7439564
Filing Date: 2008-10-21
Classification: H01L

Abstract:
1. A method of forming a capacitor construction, comprising: providing a semiconductor substrate; forming a first capacitor electrode over the substrate, the first capacitor electrode comprising conductively-doped silicon; forming a first dielectric layer over and in physical contact with the conductively-doped silicon of the first capacitor electrode, the first dielectric layer consisting of aluminum oxide; forming a second dielectric layer over the first dielectric layer, the second dielectric layer consisting of a metal oxide selected from the group consisting of hafnium oxide, tantalum oxide and zirconium oxide; and forming a second capacitor electrode having a surface over and in physical contact with the hafnium oxide, tantalum oxide or zirconium oxide of the second dielectric layer, the surface of the second capacitor electrode consisting of metal nitride; the first and second capacitor electrodes, and the first and second dielectric materials, together being incorporated into a capacitor construction.