Patent ID: 6720599
Filing Date: 2004-04-13
Classification: G11C

Abstract:
A ferroelectric memory comprising:an Si single crystal substrate; a buffer layer composed of metal oxide on the Si single crystal substrate; a bottom electrode layer including either a conductive oxide having a perovskite structure or a metal platinum Pt on the buffer layer; a ferroelectric layer composed of SrBi2Ta2O9 or Sr1âˆ’xBi2+x(Ta1âˆ’yNby)2O9(0&lE;x&lE;0.2, 0&lE;y&lE;1) having a layered perovskite structure on the bottom electrode layer; and a top electrode layer on the ferroelectric layers wherein the ferroelectric layer is in (116)-orientation in an orthorhombic system or in (117)-orientation.