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1. (WO1987003413) MAGNETIC RECORDING MEDIA
Latest bibliographic data on file with the International Bureau

Considered void 23.07.1987


Pub. No.: WO/1987/003413 International Application No.: PCT/US1986/002488
Publication Date: 04.06.1987 International Filing Date: 19.11.1986
IPC:
G11B 5/735 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62
Record carriers characterised by the selection of the material
73
Base layers
735
characterised by the back layer
Applicants:
MINNESOTA MINING AND MANUFACTURING COMPANY [US/US]; P.O. Box 33427 Saint Paul, MN 55133, US (AllExceptUS)
MIYASAKA, Mitsutoshi [JP/JP]; JP (UsOnly)
INOUE, Makoto [JP/JP]; JP (UsOnly)
ISHIDA, Neyoshi [JP/JP]; JP (UsOnly)
MIYATA, Norio [JP/JP]; JP (UsOnly)
Inventors:
MIYASAKA, Mitsutoshi; JP
INOUE, Makoto; JP
ISHIDA, Neyoshi; JP
MIYATA, Norio; JP
Agent:
BOVEE, Warren, R. @; P.O. Box 33427 Saint Paul, MN 55133, US
Priority Data:
60/26326022.11.1985JP
Title (EN) MAGNETIC RECORDING MEDIA
(FR) SUPPORT D'ENREGISTREMENT MAGNETIQUE
Abstract:
(EN) Magnetic recording medium comprising a non-magnetic base layer carrying a magnetic recording layer on one side and a back coating containing carbon black. The preferred carbon black has a surface area of between 18 and 50 m2/g and an average crystallite size, Lc, of between 18 and 60 Angstroms. Runability, edge damage and dropout characteristics are improved.
(FR) Un support d'enregistrement magnétique comprend une couche de base non magnétique portant une couche d'enregistrement magnétique d'un côté et un revêtement du noir de carbone de l'autre côté. Le noir de carbone possède de préférence une surface spécifique comprise entre 18 et 50 m2/g et la taille moyenne des cristallites Lc est comprise entre 18 et 60 Angströms. Les caractéristiques de défilement de résistance, d'endommagement des bords et de ''dropout'' (lacune) sont améliorées.
Designated States: KR, US
European Patent Office (AT, BE, CH, DE, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1019887000996