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1. WO2009014205 - VERTICAL MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCTION THEREOF, AND MAGNETIC RECORDING/REPRODUCTION DEVICE

Publication Number WO/2009/014205
Publication Date 29.01.2009
International Application No. PCT/JP2008/063374
International Filing Date 25.07.2008
IPC
G11B 5/65 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
64comprising only the magnetic material without bonding agent
65characterised by its composition
G11B 5/66 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
64comprising only the magnetic material without bonding agent
66the record carriers consisting of several layers
G11B 5/667 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
64comprising only the magnetic material without bonding agent
66the record carriers consisting of several layers
667including a soft magnetic layer
G11B 5/851 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
84Processes or apparatus specially adapted for manufacturing record carriers
851Coating a support with a magnetic layer by sputtering
CPC
G11B 5/65
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
64comprising only the magnetic material without bonding agent
65characterised by its composition
G11B 5/66
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
64comprising only the magnetic material without bonding agent
66consisting of several layers
Applicants
  • 昭和電工株式会社 SHOWA DENKO K.K. [JP]/[JP] (AllExceptUS)
  • 佐々木 有三 SASAKI, Yuzo [JP]/[JP] (UsOnly)
  • 橋本 篤志 HASHIMOTO, Atsushi [JP]/[JP] (UsOnly)
Inventors
  • 佐々木 有三 SASAKI, Yuzo
  • 橋本 篤志 HASHIMOTO, Atsushi
Agents
  • 内田 幸男 UCHIDA, Yukio
Priority Data
2007-19403826.07.2007JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) VERTICAL MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCTION THEREOF, AND MAGNETIC RECORDING/REPRODUCTION DEVICE
(FR) SUPPORT D'ENREGISTREMENT MAGNÉTIQUE VERTICAL, PROCÉDÉ POUR SA FABRICATION ET DISPOSITIF D'ENREGISTREMENT/DE REPRODUCTION MAGNÉTIQUE
(JA) 垂直磁気記録媒体、その製造方法および磁気記録再生装置
Abstract
(EN)
Disclosed is a vertical magnetic recording medium which comprises at least a soft-magnetic back layer, an under layer, an interlayer and a vertical magnetic recording layer all arranged on a non-magnetic substrate, wherein the vertical magnetic recording layer is composed of a magnetic layer having one or more constituent layers, wherein at least one constituent layer in the magnetic layer comprises a ferromagnetic crystal grain mainly composed of Co and an oxide crystal grain boundary, and wherein the ferromagnetic crystal grain contains Ru. In the vertical magnetic recording medium, all of the separation between crystal grains in the vertical magnetic recording layer, the miniaturization of crystal grain size, and the vertical orientation can be achieved. Therefore, the vertical magnetic recording medium enables the recording/reproduction of high-density information.
(FR)
L'invention concerne un support d'enregistrement magnétique vertical qui comporte au moins une couche dorsale faiblement magnétique, une sous-couche, une couche intermédiaire et une couche d'enregistrement magnétique vertical toutes agencées sur un substrat non magnétique, la couche d'enregistrement magnétique vertical étant composée d'une couche magnétique ayant une ou plusieurs couches constitutives, au moins une couche constitutive de la couche magnétique comportant un grain cristallin ferromagnétique principalement composé de Co et une surface de contour de grain cristallin d'oxyde, le grain cristallin ferromagnétique contenant du Ru. Dans le support d'enregistrement magnétique vertical, il est possible d'obtenir à la fois la séparation entre les grains cristallins dans la couche d'enregistrement magnétique vertical, la miniaturisation de la taille de grain cristallin et l'orientation verticale. Par conséquent, le support d'enregistrement magnétique vertical permet l'enregistrement/la reproduction d'informations à haute densité.
(JA)
 非磁性基板上に、少なくとも軟磁性裏打ち層と下地層と中間層と垂直磁気記録層を有する垂直磁気記録媒体において、前記垂直磁気記録層は1層以上の磁性層から構成され、そのうちの少なくとも1層が、Coを主成分とする強磁性結晶粒と、酸化物の結晶粒界とから構成され、かつ、該強磁性結晶粒がRuを含む垂直磁気記録媒体。この垂直磁気記録媒体は、垂直磁気記録層の結晶粒径の分離、結晶粒径の微細化と、垂直配向性とが両立することで、高密度の情報の記録再生が可能であるという特性を有する。
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