发明名称 |
Magnetic recording medium substrate and perpendicular magnetic recording medium |
摘要 |
A perpendicular magnetic recording medium comprising a pair of soft magnetic layers that are laminated via a non-magnetic layer and antiparallel-coupled to each other and that are provided between a non-magnetic substrate and a magnetic recording layer, wherein spike noise and medium noise can be positively suppressed when information recording and reproduction are carried out at high recording surface density. At least one pair of soft magnetic layers are laid and formed via a non-magnetic layer on a substrate of a non-magnetic material so that magnetic characteristics obtained by integrating the pair of soft magnetic layers have a magnetic hysteresis to thereby prevent the formation of a magnetic domain wall.
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申请公布号 |
US7955723(B2) |
申请公布日期 |
2011.06.07 |
申请号 |
US20060887539 |
申请日期 |
2006.03.27 |
申请人 |
WD MEDIA (SINGAPORE) PTE.LTD. |
发明人 |
UMEZAWA TEIICHIRO;SONOBE YOSHIAKI;KIM KONG |
分类号 |
G11B5/66;B32B5/16 |
主分类号 |
G11B5/66 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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