Magnetic random access memory device having thermal...

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

Reexamination Certificate

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C365S158000

Reexamination Certificate

active

10862617

ABSTRACT:
An MTJ element has two magnetic layers and a nonmagnetic layer. The resistance of the MTJ element, which varies depending on whether the two magnetic layers are magnetized parallel or antiparallel. In an MRAM adapted to write data into the MTJ element by causing a write wiring to generate induced magnetic flux and consequently changing the direction of magnetization of the recording layer, the MTJ element is a perpendicular MTJ element in which each of the two magnetic layers is magnetized in a direction perpendicular to its plane. The write wiring is placed in a direction perpendicular to the direction of the thickness of the MTJ element and applies a generated magnetic field to the magnetic layers of the MTJ element in the direction in which they are magnetized. Magnetic yokes hold the MTJ element in the direction of its thickness.

REFERENCES:
patent: 6101072 (2000-08-01), Hayashi
patent: 6219275 (2001-04-01), Nishimura
patent: 6538921 (2003-03-01), Daughton et al.
patent: 6717845 (2004-04-01), Saito et al.
patent: 2005/0018478 (2005-01-01), Nagase et al.
patent: 2005/0047262 (2005-03-01), Ikeda
patent: 2005/0281079 (2005-12-01), Yoda et al.
patent: 11-213650 (1999-08-01), None
patent: 2002-100182 (2002-04-01), None
patent: 2003-31773 (2003-01-01), None
Naoki Nishimura, et al. “Magnetic Tunnel Junction Device with Perpendicular Magnetization Films for High-Density Magnetic Random Access Memory”; Journal of Applied Physics; vol. 91; No. 8; Apr. 15, 2002; pp. 5246-5249.
R. Scheuerlein, et al., ISSCC2000 Technical Digest, vol. 43, Paper TA 7.2, pp. 128-129, “A 10NS Read and Write Non-Volatile Memory Array Using a Magnetic Tunnel Junction and Fet Switch in Each Cell”, Feb. 7, 8, and 9, 2000.
T. Ikeda, et al., Journal of Japan Applied Magnetization, vol. 24, No. 4-2, pp. 563-566, “GMR and TMR Films Using GdFe Alloy With Perpendicular Magnetization”2000.
S. S. P. Parkin, Systematic Variation of Strength and Oscillation Period of Indirect Magnetic Exchange Coupling through the 3d, 4d, and 5d Transistion Metals, Physical Review Letters, Dec. 16, 1991, vol. 67, No. 25, pp. 3598-3601.

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