Patent ID: 7883961
Filing Date: 2011-02-08
Classification: H01L

Abstract:
1. A manufacturing method for a ferroelectric memory device having a ferroelectric capacitor, the method comprising: forming a lower electrode; forming, on the lower electrode, an electrode oxide film composed of an oxide of a constituent material of the lower electrode; forming a first ferroelectric layer on the lower electrode by reaction between organometallic source material gas and oxygen gas; forming a second ferroelectric layer on the first ferroelectric layer by reaction between organometallic source material gas and oxygen gas; and forming an upper electrode on the second ferroelectric layer, wherein the oxygen gas in the forming of the first ferroelectric layer is in an amount less than the amount of oxygen necessary for reaction of the organometallic source material gas, and wherein the oxygen gas in the forming of the second ferroelectric layer is in an amount greater than the amount of oxygen necessary for reaction of the organometallic source material gas.