METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide a magnetic recording medium having high coercive force and a low noise. SOLUTION: The magnetic recording medium is obtained by forming an underlayer, a CoCrPt magnetic layer and a protective layer in order on a nonmagnetic substrate. The CoCrPt magnetic layer contain...

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Main Authors ONUKI TAKESHI, SAKAMOTO AKITO, ADACHI KAZUNORI, ISHIZAKI OSAMU, MARO TAKESHI
Format Patent
LanguageEnglish
Published 27.06.2003
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MAGNETS
PHYSICS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Abstract PROBLEM TO BE SOLVED: To provide a magnetic recording medium having high coercive force and a low noise. SOLUTION: The magnetic recording medium is obtained by forming an underlayer, a CoCrPt magnetic layer and a protective layer in order on a nonmagnetic substrate. The CoCrPt magnetic layer contains 5.0-16.5 atom % oxygen in a dispersed state. When the CoCrPt magnetic layer is deposited by sputtering, a gaseous oxygen-argon mixture is used as a sputtering gas and the mixing ratio of oxygen is regulated so that 5.0-16.5 atom % oxygen is contained in the magnetic layer. The magnetic recording medium has a remarkably increased C/N (carrier/noise) ratio. A resin substrate may be used as the nonmagnetic substrate. COPYRIGHT: (C)2003,JPO
AbstractList PROBLEM TO BE SOLVED: To provide a magnetic recording medium having high coercive force and a low noise. SOLUTION: The magnetic recording medium is obtained by forming an underlayer, a CoCrPt magnetic layer and a protective layer in order on a nonmagnetic substrate. The CoCrPt magnetic layer contains 5.0-16.5 atom % oxygen in a dispersed state. When the CoCrPt magnetic layer is deposited by sputtering, a gaseous oxygen-argon mixture is used as a sputtering gas and the mixing ratio of oxygen is regulated so that 5.0-16.5 atom % oxygen is contained in the magnetic layer. The magnetic recording medium has a remarkably increased C/N (carrier/noise) ratio. A resin substrate may be used as the nonmagnetic substrate. COPYRIGHT: (C)2003,JPO
Author ADACHI KAZUNORI
ONUKI TAKESHI
ISHIZAKI OSAMU
SAKAMOTO AKITO
MARO TAKESHI
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– fullname: MARO TAKESHI
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Physics
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Snippet PROBLEM TO BE SOLVED: To provide a magnetic recording medium having high coercive force and a low noise. SOLUTION: The magnetic recording medium is obtained by...
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SubjectTerms BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MAGNETS
PHYSICS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
Title METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM
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