Patent ID: 6841820
Filing Date: 2005-01-11
Classification: B82Y,G11C,H01L

Abstract:
1. An information storage apparatus having: word lines; bit lines each formed in such a way as to intersect with said word lines at predetermined intervals; and information storage devices each comprising a multilayered film that includes at least a magnetization fixed layer made of ferromagnetic material, a tunnel insulating layer, and a storage layer made of ferromagnetic material, provided between said word line and said bit line in an associated one of intersection regions between said word line and said bit line, characterized in that: said information storage devices each comprises: a concave portion provided in an insulating film formed between said word line and said bit line in an intersection region between said word line and said bit line; and said multilayered film formed in said concave portion; wherein: said multilayered film is composed of a relatively thin deposition of said magnetization fixed layer covering at least a side wall and an adjacent surface of the concave portion, a relatively thin deposition of said tunnel insulation layer covering at least most of the magnetization fixed layer, and the remaining portion of said concave portion is filled with said storage layer, such that said storage layer reaches to the top surface of said insulating film.