MAGNETIC DISK AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2010/064724

A1

A magnetic disk comprising a granular magnetic recording layer, with little noise even when the recording capacity thereof is 250 Gbits per square inch or greater;  also a method for manufacturing the magnetic disk.  The magnetic disk comprises: a granular magnetic recording layer (20) which is formed on a disk base (10) directly or with an intermediate layer interposed therebetween and which has a non-magnetic region between granular columnar particles; and an auxiliary recording layer (22) which is formed on the granular magnetic recording layer (20) and which causes exchange interactions among the granular columnar particles.  The auxiliary recording layer (22) contains 0.1 to 3 moles of oxygen.

JP02179918	MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION
JP61054031	MAGNETIC RECORDING MEDIUM
JP09153220	PRODUCTION OF MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM PRODUCED BY THE SAME

SAITO, Chiyo (7-5 Naka-Ochiai 2-chome, Shinjuku-k, Tokyo 25, 〒1618525, JP)
齋藤　智代 (〒25 東京都新宿区中落合２丁目７番５号　ＨＯＹＡ株式会社内 Tokyo, 〒1618525, JP)
SATO, Tokichiro (3 Tuas Link2, 2, 638552, SG)

JP2009/070499

June 10, 2010

December 07, 2009

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HOYA CORPORATION (7-5 Naka-Ochiai 2-chome, Shinjuku-ku Tokyo, 25, 〒1618525, JP)
ＨＯＹＡ株式会社 (〒25 東京都新宿区中落合２丁目７番５号 Tokyo, 〒1618525, JP)
HOYA MAGNETICS SINGAPORE PTE LTD (3 Tuas Link22, 2, 638552, SG)
ホーヤ　マグネティクス　シンガポール　プライベートリミテッド (6 リンク２　ツアス３ Singapore, 638552, SG)
SAITO, Chiyo (7-5 Naka-Ochiai 2-chome, Shinjuku-k, Tokyo 25, 〒1618525, JP)

G11B5/66; G11B5/65; G11B5/851

AOKI, Hiroyoshi et al. (7F Nibancho Cashew Bldg, 4-3 Niban-cho, Chiyoda-k, Tokyo 84, 〒1020084, JP)

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