发明名称 |
Magnetic recording medium |
摘要 |
A magnetic recording medium including a magnetic recording layer and a substrate that supports the magnetic recording layer is provided. At least two underlayers including a nonmetallic underlayer are placed between the magnetic recording layer and the substrate. The perpendicular magnetic recording medium uses a double-layered or tri-layered underlayer. Accordingly, a perpendicular magnetic recording layer can have a high perpendicular magnetic anisotropic energy constant Ku due to a third underlayer and have small crystal grains and a small exchange coupling due to a second underlayer below the third underlayer. Thus, the perpendicular magnetic recording layer can have a good thermal stability, high-density recording characteristics, and excellent SNR characteristics.
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申请公布号 |
US7229707(B2) |
申请公布日期 |
2007.06.12 |
申请号 |
US20030444962 |
申请日期 |
2003.05.27 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
OH HOON-SANG;LEE BYUNG-KYU |
分类号 |
G11B5/66;G11B5/738;G11B5/667;G11B5/73;G11B5/84 |
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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