Thin film magnetic memory device capable of conducting...

Static information storage and retrieval – Systems using particular element – Magnetic thin film

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C365S158000, C365S173000, C365S189070, C365S209000, C365S210130

Reexamination Certificate

active

07102922

ABSTRACT:
A tunnel magnetic resistive element forming a magnetic memory cell includes a fixed magnetic layer having a fixed magnetic field of a fixed direction, a free magnetic layer magnetized by an applied magnetic field, and a tunnel barrier that is an insulator film provided between the fixed and free magnetic layers in a tunnel junction region. In the free magnetic layer, a region corresponding to an easy axis region having characteristics desirable as a memory cell is used as the tunnel junction region. A hard axis region having characteristics undesirable as a memory cell is not used as a portion of the tunnel magnetic resistive element.

REFERENCES:
patent: 5587943 (1996-12-01), Torok et al.
patent: 5640343 (1997-06-01), Gallagher et al.
patent: 5892708 (1999-04-01), Pohm
patent: 5894447 (1999-04-01), Takashima
patent: 6005800 (1999-12-01), Koch et al.
patent: 6081445 (2000-06-01), Shi et al.
patent: 6104632 (2000-08-01), Nishimura
patent: 6166948 (2000-12-01), Parkin et al.
patent: 6178112 (2001-01-01), Bessho et al.
patent: 6215695 (2001-04-01), Ikeda
patent: 6317375 (2001-11-01), Perner
patent: 6349054 (2002-02-01), Hidaka
patent: 6359805 (2002-03-01), Hidaka
patent: 6396735 (2002-05-01), Michijima et al.
patent: 6473336 (2002-10-01), Nakajima et al.
patent: 6480411 (2002-11-01), Koganei
patent: 6480412 (2002-11-01), Bessho et al.
patent: 6482657 (2002-11-01), Shimazawa
patent: 6490190 (2002-12-01), Ramcke et al.
patent: 6509621 (2003-01-01), Nakao
patent: 6519179 (2003-02-01), Minakata et al.
patent: 6529404 (2003-03-01), Hidaka
patent: 6587371 (2003-07-01), Hidaka
patent: 6608776 (2003-08-01), Hidaka
patent: 6778430 (2004-08-01), Hidaka
patent: 2001/0012228 (2001-08-01), Perner
patent: 2001/0021537 (2001-09-01), Shimazawa
patent: 2001/0025978 (2001-10-01), Nakao
patent: 2001/0026471 (2001-10-01), Michijima et al.
patent: 2001/0053104 (2001-12-01), Tran et al.
patent: 2002/0018361 (2002-02-01), Hoffmann et al.
patent: 2002/0058158 (2002-05-01), Odagawa et al.
patent: 2002/0080644 (2002-06-01), Ito
patent: 2003/0002333 (2003-01-01), Hidaka
patent: 1270696 (2000-10-01), None
patent: 101 13 853 (2001-10-01), None
patent: 1998-024995 (1998-07-01), None
Scheuerlein; “Magneto-Resistive IC Memory Limitations and Architecture Implications”;International Non-Volatile Memory Technology Conference; IEEE; c. 1998; pp. 47-50.
Johnson; “Magnetoelectric Memories Last and Last . . . ”;Spectrum; IEEE; c. 2000; pp. 33-40.
Tehrani et al.; Recent Developments in Magnetic Tunnel Junction MRAM;Transactions on Magnetics; IEEE; c. 2000; pp. 2752-2757.
Scheuerlein et al.; “A 10ns Read and Write Non-Volatile Memory Array Using a Magnetic Tunnel Junction and FET Switch in Each Cell”;Emerging Memory&Device Technologies; Session 7, Paper TA 7.2; ISSCC 2000; IEEE International Solid-State Circuits Conference; c. 2000; pp. 128.
Durlam et al.; “Nonvolatile RAM Based on Magnetic Tunnel Junction Elements”;Emerging Memory&Device Technologies; Session 7, Paper TA 7.3; ISSCC 2000; IEEE International Solid-State Circuits Conference; c. 2000; pp. 130.
Naji et al.; “A 256kb 3.0V 1T1MTJ Nonvolatile Magnetoresistive RAM”;Technology Directions: Advanced Technologies; Session 7, 7.6; ISSCC 2001; IEEE International Solid-State Circuits Conference; c. 2001; pp. 122-123 and 438.
Yamada et al; “A Novel Sensing Scheme for a MRAM with a 5% MR Ratio”;Symposium in VLSI Circuits Digest of Technical Papers; c. 2001; pp. 123-124; Japan.
Scheuerlein, et al., “A 10ns Read and Write Non-Volatile Memory Array Using A Magnetic Tunnel Junction and FET Switch in Each Cell” ISSCC Digest of Technical Papers, TA7.2. Feb. 2000, pp. 94-95, 128-129, 409-410.
Durlam, et al, Nonvolatile RAM Based On Magnetic Tunnel Junction Elements, ISSCC Digest of Technical Papers, TA7.3, Feb. 2000, pp. 96-97, 130-131, 410-411.
Numata, et al., Magnetic Random Access Memory(MRAM), Technical Report of IEICE, Mar. 2000, pp. 13-18.
Naji, et al., “A 256kb 3.0V 1TMTJ Nonvolatile Magnetoresistive RAM” ISSCC Digest of Technical Papers, TA7.6, Feb. 6, 2001, pp. 94-95, 122-123, 404-405, 438.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Thin film magnetic memory device capable of conducting... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-3607790

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.