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US07120048B2 Nonvolatile memory vertical ring bit and write-read structure 失效
非易失性存储器垂直环位和写读结构

Nonvolatile memory vertical ring bit and write-read structure
Abstract:
A magnetoresistive memory cell and array are provided for nonvolatile storage of binary information. According to an embodiment, a memory cell has a ring-shaped magnetoresistive multilayer element (or bit). A plurality of vias pass through a center hole in the ring-shaped element. Each end of each via is coupled with a separate write-read line segment that extends radially from the center hole past a perimeter of the ring-shaped element. The write-read lines are configured to generate magnetic fields for switching a magnetization direction of one or more layers of the ring-shaped bits in the array.
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