APPARATUS FOR PRODUCTION OF MAGNETIC RECORDING MEDIUM

PROBLEM TO BE SOLVED: To prevent the occurrence of thermal vulnerability which is the drawback of high-frequency induction heating with an apparatus for production of a magnetic recording medium forming magnetic layers of multilayered constitution. SOLUTION: The magnetic layers are deposited by evap...

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Bibliographische Detailangaben
1. Verfasser:	NAKADA JUNJI
Format:	Patent
Sprache:	eng
Schlagworte:	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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Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the occurrence of thermal vulnerability which is the drawback of high-frequency induction heating with an apparatus for production of a magnetic recording medium forming magnetic layers of multilayered constitution. SOLUTION: The magnetic layers are deposited by evaporation on a base film 3 by heating the magnetic material 10 in an evaporation vessel 16 by a high-frequency induction heating coil 12. The base film 3 is irradiated with an electron beam 31 emitted from an electron beam irradiation source 30 prior thereto. As a result, charges are accumulated on the film 3. The film 3 is brought into tight contact with a cooling can 4. The heat by vapor deposition is allowed to escape well to the cooling can 4 and the thermal vulnerability of the film 3 is prevented.