| US 7,580,223 B2 | ||
| Magnetic recording media, substrate for magnetic recording media, and magnetic recording apparatus | ||
| Masatoshi Sakurai, Tokyo (Japan); Akira Kikitsu, Yokohama (Japan); and Masahiro Oka, Ichihara (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan); and Showa Denko K.K., Tokyo (Japan) | ||
| Filed on Jun. 28, 2006, as Appl. No. 11/475,874. | ||
| Claims priority of application No. 2005-188386 (JP), filed on Jun. 28, 2005. | ||
| Prior Publication US 2007/0003793 A1, Jan. 04, 2007 | ||
| Int. Cl. G11B 5/82 (2006.01) | ||
| U.S. Cl. 360—135 [360/15; 428/826; 428/848.1] | 10 Claims |
| 1. A magnetic recording media comprising:
a substrate having recording tracks and separating regions separating adjacent recording tracks across a down-track direction,
the separating regions having patterns of protrusions and recesses formed therein; and
a recording film deposited on the substrate,
wherein a difference in height between a top of the recording track and a top of the separating region is 2 nm or more and
7 nm or less, and a difference in height between the top of the recording track and a bottom of the separating region is 10
nm or more.
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