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1. (WO2005031713) PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2005/031713 International Application No.: PCT/JP2004/014300
Publication Date: 07.04.2005 International Filing Date: 22.09.2004
IPC:
G11B 5/64 (2006.01)
Applicants: IWASAKI, Takeshi[JP/JP]; JP (UsOnly)
OIKAWA, Soichi[JP/JP]; JP (UsOnly)
NAKAMURA, Futoshi[JP/JP]; JP (UsOnly)
MAEDA, Tomoyuki[JP/JP]; JP (UsOnly)
SAKAI, Hiroshi[JP/JP]; JP (UsOnly)
SAKAWAKI, Akira[JP/JP]; JP (UsOnly)
SHIMIZU, Kenji[JP/JP]; JP (UsOnly)
KABUSHIKI KAISHA TOSHIBA[JP/JP]; 1-1, Shibaura 1-chome Minato-ku, Tokyo 105-8001, JP (AllExceptUS)
SHOWA DENKO K.K[JP/JP]; 13-9, Shiba Daimon 1-chome Minato-ku Tokyo 105-8518, JP (AllExceptUS)
Inventors: IWASAKI, Takeshi; JP
OIKAWA, Soichi; JP
NAKAMURA, Futoshi; JP
MAEDA, Tomoyuki; JP
SAKAI, Hiroshi; JP
SAKAWAKI, Akira; JP
SHIMIZU, Kenji; JP
Agent: SHIGA, Masatake ; 2-3-1 Yaesu Chuo-ku Tokyo 104-8453, JP
Priority Data:
2003-33348025.09.2003JP
60/507,12401.10.2003US
Title (EN) PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS
(FR) SUPPORT D'ENREGISTREMENT MAGNETIQUE PERPENDICULAIRE ET APPAREIL D'ENREGISTREMENT/LECTURE MAGNETIQUE
Abstract: front page image
(EN) To make possible high density recording by making the structure of the perpendicular magnetic recording layer finer. A perpendicular magnetic recording medium 10 includes at least a nonmagnetic under layer 2, a perpendicular magnetic layer 3, and a protective layer which are stacked on a nonmagnetic substrate 1, wherein the perpendicular magnetic layer includes ferromagnetic crystal grains and nonmagnetic crystal grain boundary regions, wherein the crystal grain boundary region includes at least two kinds of oxide.
(FR) La présente invention vise à permettre un enregistrement haute densité au moyen de la formation d'une structure plus fine de la couche d'enregistrement magnétique perpendiculaire. Un support d'enregistrement magnétique perpendiculaire (10) inclut au moins une couche sous-jacente non magnétique (2), une couche magnétique perpendiculaire (3) et une couche protectrice qui sont empilées sur un substrat non magnétique (1), ladite couche magnétique perpendiculaire contenant des grains cristallins ferromagnétiques et des régions frontières des grains cristallins non magnétiques, ces régions frontières des grains cristallins contenant au moins deux types d'oxyde.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)