发明名称 |
Perpendicular magnetic recording medium |
摘要 |
In a perpendicular magnetic recording medium which includes a substrate (1) of a nonmagnetic material, first and second nonmagnetic underlayers (4 and 5) formed on the substrate, and a perpendicular magnetic recording layer (6) formed on the first and the second nonmagnetic underlayers, the first nonmagnetic underlayer is made of an amorphous nonmagnetic metal material containing a metal element which forms a face-centered cubic (fcc) crystal structure by a simple substance. The second nonmagnetic underlayer is formed on the first nonmagnetic underlayer in contact with the first nonmagnetic underlayer and made of a nonmagnetic material containing a hexagonal close packed structure. The perpendicular magnetic recording layer is formed on the second nonmagnetic underlayer in contact with the second nonmagnetic layer.
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申请公布号 |
US7993765(B2) |
申请公布日期 |
2011.08.09 |
申请号 |
US20040898348 |
申请日期 |
2004.07.26 |
申请人 |
WD MEDIA (SINGAPORE) PTE. LTD. |
发明人 |
KIM KONG;OSAKABE KINOBU;HORIKAWA JUNICHI |
分类号 |
G11B5/667;G11B5/738;G11B5/65;G11B5/66;G11B5/73 |
主分类号 |
G11B5/667 |
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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