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1. WO1997026650 - BICRYSTAL CLUSTER MAGNETIC RECORDING MEDIUM

Publication Number WO/1997/026650
Publication Date 24.07.1997
International Application No. PCT/US1996/020153
International Filing Date 23.12.1996
Chapter 2 Demand Filed 08.08.1997
IPC
G11B 5/64 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
G11B 5/73 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
73Base layers
G11B 5/84 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
CPC
G11B 5/656
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
656containing Co
G11B 5/737
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
73Base layers ; , i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
7368Non-polymeric layer under the lowermost magnetic recording layer
7369Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
737Physical structure of underlayer, e.g. texture
G11B 5/7379
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
73Base layers ; , i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
7368Non-polymeric layer under the lowermost magnetic recording layer
7379Seed layer, e.g. at least one non-magnetic layer is specifically adapted as a seed or seeding layer
G11B 5/73921
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
73Base layers ; , i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
739Magnetic recording media substrates
73911Inorganic substrates
73921Glass or ceramic substrates
G11B 5/8404
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
8404manufacturing base layers
Y10S 428/90
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
428Stock material or miscellaneous articles
90Magnetic feature
Applicants
  • SEAGATE TECHNOLOGY [US]/[US]
Inventors
  • CHEN, Ga-Lane
  • CHEN, Qixu
Agents
  • HANKINS, John, A.
Priority Data
08/586,57116.01.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BICRYSTAL CLUSTER MAGNETIC RECORDING MEDIUM
(FR) SUPPORT D'ENREGISTREMENT MAGNETIQUE A AGREGATS BICRISTALLINS
Abstract
(EN)
A magnetic recording medium having low medium noise and suitable for high density magnetic recording is produced with a bicrystal cluster magnetic layer (33) on a glass or glass-ceramic substrate (30). An underlayer (32) which is formed with a (200) crystallographic orientation induces the formation of a bicrystal cluster microstructure in a magnetic alloy layer (33) epitaxially grown on the underlayer.
(FR)
Un support d'enregistrement magnétique émettant un bruit faible et convenant à un enregistrement magnétique haute densité est produit avec une couche magnétique (33) d'agrégats bicristallins sur un substrat (30) en verre ou vitro-céramique. La couche de base (32), qui est formée avec une orientation crystallographique (200), induit la formation d'une microstructure d'agrégats bicristallins dans une couche d'alliage magnétique (33) épitaxiale formée sur la couche de base.
Also published as
DE19681740
Latest bibliographic data on file with the International Bureau