Invention Grant
- Patent Title: Multibit magnetic random access memory device
- Patent Title (中): 多位磁性随机存取存储器件
-
Application No.: US12364351Application Date: 2009-02-02
-
Publication No.: US07881099B2Publication Date: 2011-02-01
- Inventor: Chee-kheng Lim
- Applicant: Chee-kheng Lim
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: Sughrue Mion, PLLC
- Priority: KR2004-0036380 20040521
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C11/14

Abstract:
A multi-bit magnetic random access memory device and a method for writing to and sensing the multi-bit magnetic random access memory device. The magnetic memory includes a memory cell with a multilayer structure having a plurality of data layers which can each store one bit. The structure includes a plurality of magnetically changeable ferromagnetic layers, a ferromagnetic reference layer having a fixed magnetization state, a first spacer layer separating the magnetically changeable ferromagnetic layers, and a second spacer layer separating the ferromagnetic reference layer from the magnetically changeable ferromagnetic layers. This structure allows for more than one-bit to be stored as well as for efficient writing and reduced power consumption.
Public/Granted literature
- US20090201720A1 MULTIBIT MAGNETIC RANDOM ACCESS MEMORY DEVICE Public/Granted day:2009-08-13
Information query