发明名称 |
Evaluation method of magnetic disk, manufacturing method of magnetic disk, and magnetic disk |
摘要 |
An evaluation method that can easily evaluate properties of a carbon protective film and a lubricant on a magnetic-disk surface or particularly, an evaluation method of a magnetic disk in which the properties of the magnetic-disk surface can be evaluated accurately so that a strict demand for interactions between the magnetic-disk surface and a head can be met is provided. In a state in which an element portion of the magnetic head provided with the head element portion that projects by thermal expansion is projected, after being brought into contact with a predetermined radial position on the surface of the rotating magnetic disk, the head is further made to perform seeking in a state in which the element portion is projected by a specified amount, whereby the properties of the carbon film or the lubricant formed on the magnetic-disk surface is evaluated. |
申请公布号 |
US8908315(B2) |
申请公布日期 |
2014.12.09 |
申请号 |
US201113074369 |
申请日期 |
2011.03.29 |
申请人 |
WD Media (Singapore) Pte. Ltd. |
发明人 |
Ozawa Tsuyoshi |
分类号 |
G11B21/02;G11B5/31;G11B5/84;G11B5/455 |
主分类号 |
G11B21/02 |
代理机构 |
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代理人 |
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主权项 |
1. An evaluation method of a magnetic disk, the evaluation method comprising:
thermally expanding a head element portion of a magnetic head; bringing the magnetic head into contact with a predetermined radial position on a surface of the magnetic disk that is rotating; and evaluating properties of a carbon film or a lubricant formed on the surface of the magnetic disk by performing seeking, using the magnetic head having the head element portion projected by a specified amount, after the magnetic head is brought into contact with the magnetic disk. |
地址 |
Singapore SG |