Patent ID: 6140139
Filing Date: 2000-10-31
Classification: G11C,H01L

Abstract:
A method of manufacturing a Hall effect ferromagnetic non-volatile random access memory cell, comprising the steps of:a) providing a piece of substantially planar substrate material;b) depositing upon the surface of said substrate a substantially planar layer of Hall sensor material, and a magnetically polarizable domain formed of ferromagnetic material, said domain having a long axis substantially perpendicular to the plane of the Hall sensor material;c) depositing upon said ferromagnetic material a first layer of insulating material;d) depositing upon said first layer of insulating material an electrically conductive material formed into a coil substantially surrounding the length of said domain and configured to produce a residual magnetic field therein when an electrical current is applied to said coil;e) depositing interconnect lines upon the surface of said substrate for electrically connecting said Hall sensor material to a source and a pair of drains;f) depositing interconnect lines upon the surface of said substrate for uniquely electrically connecting said coil to a bit write line and a word write line; andg) coating the entire cell structure with a passivation layer.