Patent ID: 7271010
Filing Date: 2007-09-18
Classification: B82Y,H01L

Abstract:
1. A manufacturing method of a nonvolatile magnetic memory device, comprising the steps of; (A) forming a transistor for selection, in a semiconductor substrate, (B) forming a first insulating interlayer on the entire surface, (C) forming a first opening portion through the first insulating interlayer, and forming a first connecting hole connected to the transistor for selection in the first opening portion, (D) forming a first wiring extending in a first direction on the first insulating interlayer, (E) forming a second insulating interlayer on the entire surface, (F) forming a stacking structure constituted at least of a first ferromagnetic layer, a tunnel barrier and a second ferromagnetic layer on the second insulating interlayer, (G) forming a second opening portion in those portions of the stacking structure and the second insulating interlayer which portions are positioned above the first connecting hole, (H) forming an electrically conductive layer on the entire surface including an inside of the second opening portion, (I) patterning the electrically conductive layer, the second ferromagnetic layer and the tunnel barrier, thereby to obtain a second connecting hole connected to the first connecting hole in the second opening portion, (J) patterning the first ferromagnetic layer, thereby to obtain a tunnel magnetoresistance device having the tunnel barrier sandwiched between the first and second ferromagnetic layers, and also to obtain an extending portion of the first ferromagnetic layer, said extending portion having an end face being in contact with the second connecting hole, (K) forming a third insulating interlayer on the entire surface, and (L) forming a second wiring on the third insulating interlayer, said second wiring being electrically connected to the second ferromagnetic layer and extending in a second direction different from the first direction.