Patent ID: 7468541
Filing Date: 2008-12-23
Classification: G11C,H01L

Abstract:
1. A magnetic random access memory comprising: a magnetic recording element which includes a fixed layer whose magnetization direction is fixed, a recording layer whose magnetization direction changes, and a nonmagnetic layer provided between the fixed layer and the recording layer, the recording layer having a first running portion, a first projecting portion and a second projecting portion, the first running portion which runs in a direction of axis of easy magnetization, the first and second projecting portions which project from two side surfaces of the first running portion, a first length of the first projecting portion in a first projecting direction being substantially equal to a second length of the second projecting portion in a second projecting direction, a planar shape of the recording layer being a cross shape, a planar shape of the first running portion being an ellipse; a mask layer which is arranged above the first running portion, a planar shape of the mask layer being the same as a planar shape of the first running portion; a first sidewall layer and a second sidewall layer which are formed on two side surfaces of the mask layer, respectively, oppose via the mask layer, and arranged on the first projecting portion and the second projecting portion, respectively, a material of the first sidewall layer and the second sidewall layer being different from materials of the mask layer and an interlayer insulating film formed around the magnetic recording element, a planar shape of the first sidewall layer and the second sidewall layer being the same as a planar shape of the first projecting portion and the second projecting portion, the mask layer, the first sidewall layer and the second sidewall layer being made of an insulating material; a via which extends through the mask layer and is connected to the magnetic recording element; and a wiring which is connected to the via.