Patent ID: 6077716
Filing Date: 2000-06-20
Classification: G11C,H01L

Abstract:
A method for manufacturing a matrix type multiple numeration system ferroelectric random access memory using a leakage current, comprising the steps of:(a) forming stacked dielectric and ferroelectric memory cells in strips by selectively etching a lower electrode, a dielectric layer, a conductive surface layer, a ferroelectric layer, and an upper electrode layer which are sequentially stacked on a substrate (the ferroelectric and dielectric sequence may be switched);(b) forming the individual memory cells by separating the stacked strips excluding said lower electrode, using a selective etching method;(c) filling the space between memory cells with an insulating material so as to completely cover said separated memory cells, and forming a window so as to expose said upper electrode; and(d) forming a word line by depositing a conductive material so as to fill said window and contact said upper electrode, and patterning said deposited conductive material into strips at right angles to the direction of said lower electrode.