Patent ID: 6930013
Filing Date: 2005-08-16
Classification: H01L

Abstract:
1. A method of forming a capacitor of an integrated circuit device, the capacitor comprising a lower electrode, an upper electrode, and a dielectric stack therebetween, comprising the steps of: a) adsorbing a metal compound on the lower electrode by using a gaseous metal compound; b) purging a physisorbed metal compound on the lower electrode by using an inert gas; c) oxidizing the metal compound adsorbed on the lower electrode to form a metal oxide; d) purging a gaseous product formed by oxidizing the metal compound; e) repeating the steps a) to d) to form a diffusion barrier layer of the metal oxide; f) performing a UV-O3 treatment on the diffusion barrier layer; g) forming a dielectric layer comprised of Ta h) performing a heat treatment for the dielectric layer comprised of Ta wherein the dielectric stack comprising the diffusion barrier layer and the dielectric layer formed on a surface of the lower electrode has an equivalent silicon oxide layer thickness of about 25 Å.