Patent ID: 6812089
Filing Date: 2004-11-02
Classification: H01L

Abstract:
A method for fabricating a ferroelectric memory device, comprising the steps of:a1) forming a lower electrode on a predetermined surface of a semiconductor substrate; b1) forming a metal oxide layer over a surface of the lower electrode and a surface of the semiconductor substrate; c1) forming an inter layer dielectric film over the metal oxide layer; d1) performing a blanket etching for the inter layer dielectric film and the metal oxide layer in order to expose an upper surface of the lower electrode; and e1) forming an opening which has a predetermined depth, wherein the opening is obtained by removing only the metal oxide layer between the inter layer dielectric film and the lower electrode through a selective etching process; a2) forming a ferroelectric layer on the lower electrode and the inter layer dielectric film; and b2) forming an upper electrode on the ferroelectric layer formed on the lower electrode.