Patent ID: 6958503
Filing Date: 2005-10-25
Classification: B82Y,H01L

Abstract:
1. A nonvolatile magnetic memory device comprising; (A) a transistor for selection which is formed in a semiconductor substrate, (B) a lower insulating interlayer which covers the transistor for selection, (C) a first connecting hole which is formed in a first opening portion made through the lower insulating interlayer and is connected to the transistor for selection, (D) a first wiring which is formed on the lower insulating interlayer, is composed of an electrically conductive layer, and extends in a first direction, (E) a tunnel magnetoresistance device which is formed on the first wiring through an insulating film, and has a stacking structure formed of a first ferromagnetic layer, a tunnel barrier and a second ferromagnetic layer which are positioned in this order from below, (F) an upper insulating interlayer which covers the tunnel magnetoresistance device, the lower insulating interlayer and an extending portion of the first wiring, and (G) a second wiring which is formed on the upper insulating interlayer, is electrically connected to a top surface of the tunnel magnetoresistance device, and extends in a second direction different from the first direction, in which a lower surface of the tunnel magnetoresistance device is electrically connected to the first connecting hole through a second connecting hole which is formed in a second opening portion made through at least the insulating film and the first wiring and is electrically insulated from the first wiring, and the tunnel magnetoresistance device, the insulating film and the first wiring have nearly the same widths along the second direction.