Patent ID: 7705340
Filing Date: 2010-04-27
Classification: H01L

Abstract:
1. A magnetoresistive structure comprising: a first ferromagnetic layer; a second ferromagnetic layer; a spacer layer between the first ferromagnetic layer and the second ferromagnetic layer; first and second non-planar inflections shared by the first ferromagnetic layer, the spacer layer, and the second ferromagnetic layer, each of the layers collectively forming a non-planar magnetic storage stack having substantially the same shape through the first and second inflections and along the entire length of the magnetic storage stack, the magnetic storage stack operable to store a bit of data; wherein the first ferromagnetic layer, the second ferromagnetic layer, and the spacer layer extend together for a certain length, and wherein the first inflection is interposed between a first portion of the length that extends for a first distance in a first direction, and a second portion of the length that extends for a second distance in a second direction different than the first direction, and wherein the second inflection is interposed between the second portion of the length and a third portion of the length that extends for a third distance in the first direction, wherein the third portion is not over the first portion; and a conductive read/write line extending beyond maximum widths of the first ferromagnetic layer, the second ferromagnetic layer, and the spacer layer along a third direction orthogonal to the first and second directions, wherein the conductive read/write line passes above the second portion of the length and between the first and third portions of the length, a thickness of the conductive read/write line not extending above terminal ends of the first and third portions of the length.