Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2004-10-01
2009-02-24
Blouin, Mark (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
07495870
ABSTRACT:
A magnetoresistive effect element includes a magnetization pinned layer, a magnetization free layer; a nonmagnetic metal layer disposed between the magnetization pinned layer and the magnetization free layer, a resistance increasing layer, a spin filter layer, and a pair of electrodes. The resistance increasing layer includes a insulation portion and is disposed in at least one of the magnetization pinned layer, the magnetization free layer, and the nonmagnetic metal layer. The spin filter layer is disposed to be adjacent to the magnetization free layer and has a thickness in a range of 5 nm to 20 nm. The magnetization free layer is disposed between the spin filter layer and the nonmagnetic metal layer. The magnetization pinned layer, the magnetization free layer, the nonmagnetic layer, the resistance increasing layer, and the spin filter layer are disposed between the electrodes.
REFERENCES:
patent: 4630086 (1986-12-01), Sato et al.
patent: 5715121 (1998-02-01), Sakakima et al.
patent: 5946622 (1999-08-01), Bojeryd
patent: 5966322 (1999-10-01), Pohm et al.
patent: 6002553 (1999-12-01), Stearns et al.
patent: 6111729 (2000-08-01), Kamiguchi et al.
patent: 6205008 (2001-03-01), Gijs et al.
patent: 6348274 (2002-02-01), Kamiguchi et al.
patent: 6400537 (2002-06-01), Sakakima et al.
patent: 6473275 (2002-10-01), Gill
patent: 6538861 (2003-03-01), Hayashi et al.
patent: 6560077 (2003-05-01), Fujiwara et al.
patent: 6590750 (2003-07-01), Abraham et al.
patent: 6603642 (2003-08-01), Araki et al.
patent: 6759084 (2004-07-01), Ju et al.
patent: 7072153 (2006-07-01), Koui et al.
patent: 7218483 (2007-05-01), Yuasa et al.
patent: 2002/0051380 (2002-05-01), Kamiguchi et al.
patent: 2002/0073785 (2002-06-01), Prakash et al.
patent: 2003/0035256 (2003-02-01), Hayashi et al.
patent: 2003/0123200 (2003-07-01), Nagasaka et al.
patent: 2004/0021990 (2004-02-01), Koui et al.
patent: 2004/0086751 (2004-05-01), Hasegawa et al.
patent: 2005/0002126 (2005-01-01), Fujiwara et al.
patent: 2000-137906 (2000-05-01), None
patent: 2002-157711 (2002-05-01), None
patent: 2002-208744 (2002-07-01), None
patent: 2002-353535 (2002-12-01), None
patent: 2003-188440 (2003-07-01), None
M. Takagishi, et al., “The Applicability of CPP-GMR Heads for Magnetic Recording”, IEEE Transactions On Magnetics, vol. 38, No. 5, Sep. 2002, pp. 2277-2282.
M. A. Howson, et al., “Magnetic Multilayers of FE/AU: Role of the Electron Mean Free Path”, J. Phys.: Condens. Matter 11, 1999, pp. 5717-5722.
K. Nagasaka, et al. “Giant Magnetroresistance Properties of Specular Spin Valve Films in a Current Perpendicular to Plane Structure”, Journal of Applied Physics, vol. 89, No. 11, Jun. 1, 2001, pp. 6943-6945.
U.S. Appl. No. 10/954,545, filed Oct. 01, 2004, Yuasa et al.
U.S. Appl. No. 11/017,965, filed Dec. 22, 2004, Yuasa et al.
U.S. Appl. No. 10/659,299, filed Sep. 11, 2003, Susumu Hashimoto et al.
Fukuzawa Hideaki
Hashimoto Susumu
Iwasaki Hitoshi
Yuasa Hiromi
Blouin Mark
Kabushiki Kaisha Toshiba
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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