Patent ID: 6602722
Filing Date: 2003-08-05
Classification: C23C,H01L

Abstract:
A process for fabricating a capacitor, comprising the steps of:a) preparing semiconductor structure having a semiconductor substrate; b) forming a first electrode on said semiconductor structure; c) depositing ferroelectric complex oxide expressed as ABO3on said lower electrode; d) completing a capacitor through a high temperature heat treatment for crystallizing said ferroelectric complex oxide, and a low temperature heat treatment for eliminating impurities causative of degradation from said ferroelectric complex oxide, wherein said high temperature heat treatment and said low temperature heat treatment are conducted in an inert, low oxygen atmosphere, in which the oxygen concentration ranges from 0 to 5 percent; e) repeating said high temperature heat treatment and said low temperature heat treatment; and f) forming a second electrode on said ferroelectric complex oxide.