Invention Grant
- Patent Title: Magnetic random access memory devices including multi-bit cells
- Patent Title (中): 包括多位单元的磁性随机存取存储器件
-
Application No.: US13158316Application Date: 2011-06-10
-
Publication No.: US08488372B2Publication Date: 2013-07-16
- Inventor: Mourad El Baraji , Neal Berger
- Applicant: Mourad El Baraji , Neal Berger
- Applicant Address: US CA Santa Clara
- Assignee: Crocus Technology Inc.
- Current Assignee: Crocus Technology Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Cooley LLP
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A magnetic random access memory (MRAM) cell includes a storage layer, a sense layer, and a spacer layer between the storage layer and the sense layer. A field line is magnetically coupled to the MRAM cell to induce a magnetic field along a magnetic field axis, and at least one of the storage layer and the sense layer has a magnetic anisotropy axis that is tilted relative to the magnetic field axis. During a write operation, a storage magnetization direction is switchable between m directions to store data corresponding to one of m logic states, with m>2, where at least one of the m directions is aligned relative to the magnetic anisotropy axis, and at least another one of the m directions is aligned relative to the magnetic field axis. During a read operation, a sense magnetization direction is varied, relative to the storage magnetization direction, to determine the data stored by the storage layer.
Public/Granted literature
- US20120314488A1 Magnetic Random Access Memory Devices Including Multi-Bit Cells Public/Granted day:2012-12-13
Information query