Non-volatile magnetic memory device

Details Non-volatile magnetic memory device Non-volatile magnetic memory device

2006-09-19

2006-09-19

Yoha, Connie C. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Differential sensing

C365S145000, C365S158000, C365S170000, C365S171000

Reexamination Certificate

active

07110312

ABSTRACT:
A non-volatile magnetic memory cell having a magnetic element with multiple segments which are not co-linear. Each of the segments is magnetized with a remnant magnetic field using a single write line. The segments can be magnetized in a first direction or a second direction, corresponding to first and second orientations of the memory cell. A sensor is provided to determine the direction in which the segments are magnetized and thereby the orientation of the cell. The segments are oriented such that the magnetic flux fields created by their respective remnant magnetic fields have a cumulative effect at a sensing region of the sensor. The cumulative effect allows a less sensitive sensor to be used than in known device. In various embodiments, the magnetic element can have a number of linear segments or a curved profile. In another embodiment, multiple magnetic elements are magnetized by a single write line. The multiple magnetic elements are arranged such that remnant magnetic field stored in them can be cumulatively sensed. In another embodiment, the magnetic element is arranged to be magnetized in a single general direction, but is shaped such that magnetic flux lines emanate from it in different directions. The different directions are arranged to direct flux lines through the sensing region of a sensor, which measures their cumulative effect.

REFERENCES:
patent: 4607271 (1986-08-01), Popovic et al.
patent: 4791604 (1988-12-01), Lienau et al.
patent: 4803658 (1989-02-01), Grimes
patent: 5025416 (1991-06-01), Prinz
patent: 5075247 (1991-12-01), Matthews
patent: 5289410 (1994-02-01), Katti et al.
patent: 5295097 (1994-03-01), Lienau
patent: 5329480 (1994-07-01), Wu et al.
patent: 5652445 (1997-07-01), Johnson
patent: 6016269 (2000-01-01), Peterson et al.
patent: 6266267 (2001-07-01), Lienau
patent: 6515897 (2003-02-01), Monsma et al.
patent: 2 039 431 (1980-08-01), None

Affiliated with

Also associated with

Rating

Non-volatile magnetic memory device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-volatile magnetic memory device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-volatile magnetic memory device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3586901