Patent ID: 7955872

Claim:
A manufacturing method of a magnetic memory comprising: sequentially forming a first conductive layer, a laminated film having a magnetic memory function, a second conductive layer, a third conductive layer, and a fourth conductive layer on a substrate; processing the fourth conductive layer into a predetermined shape; forming a first side wall spacer material layer while covering at least the processed fourth conductive layer; forming first side wall spacers while the first side wall spacer material layers formed on side walls of the fourth conductive layer are left and the remainder is removed; forming undercut shapes under the first side wall spacers while removing areas of the third conductive layer exposed on an upper surface of the substrate prepared in the above-described steps and areas corresponding to lower portions of the first side wall spacers; etching the second conductive layer and the laminated film having a magnetic memory function by ion milling using the fourth conductive layer and the first side wall spacers as mask areas; removing the first side wall spacers formed on the side walls of the fourth conductive layer; forming a dielectric film on the surface of the substrate prepared in the above-described steps; exposing, after the dielectric film is planarized by polishing, the processed fourth conductive layer on an upper surface of the dielectric film; and forming a fifth conductive layer which is electrically coupled to at least the fourth conductive layer.