Invention Application
- Patent Title: Method for switching magnetic moment in magnetoresistive random access memory with low current
- Patent Title (中): 低电流磁阻随机存取存储器中磁矩切换的方法
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Application No.: US12219247Application Date: 2008-07-18
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Publication No.: US20090003043A1Publication Date: 2009-01-01
- Inventor: Chien-Chung Hung , Ming-Jer Kao , Yuan-Jen Lee , Lien-Chang Wang
- Applicant: Chien-Chung Hung , Ming-Jer Kao , Yuan-Jen Lee , Lien-Chang Wang
- Assignee: Industrial Technology Research Institute
- Current Assignee: Industrial Technology Research Institute
- Main IPC: G11C11/02
- IPC: G11C11/02 ; G11C7/00

Abstract:
A method for writing a memory cell of a magnetoresistive random access memory (MRAM) device includes, sequentially, providing a first magnetic field in a first direction, providing a second magnetic field in a second direction substantially perpendicular to the first direction, turning off the first magnetic field, providing a third magnetic field in a third direction opposite to the first direction, turning off the second magnetic field, and turning off the third magnetic field. A method for switching magnetic moments in an MRAM memory cell includes providing a magnetic field in a direction forming a blunt angle with a direction of a bias magnetic field. A method for reading an MRAM device includes partially switching magnetic moments in a reference memory cell to generate a reference current; measuring a read current through a memory cell to be read; and comparing the read current with the reference current.
Public/Granted literature
- US07800937B2 Method for switching magnetic moment in magnetoresistive random access memory with low current Public/Granted day:2010-09-21
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