发明名称 |
GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC RECORDING MEDIUM |
摘要 |
With regard to a glass substrate 1 according to the present invention, a value of an amendment concentricity AC that has taken into consideration Sk and/or Ku calculated from a shape profile over the whole circumference of an inside hole, or the skewness is within a predetermined range. The glass substrate for a magnetic recording medium can stably read servo information including track information stored on a magnetic disk when the glass substrate is used for an HDD.
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申请公布号 |
US2013089754(A1) |
申请公布日期 |
2013.04.11 |
申请号 |
US201213644835 |
申请日期 |
2012.10.04 |
申请人 |
HOYA CORPORATION;HOYA GLASS DISK (THAILAND) LTD.;HOYA GLASS DISK (THAILAND) LTD.;HOYA CORPORATION |
发明人 |
NISHIMORI KENICHI |
分类号 |
G11B5/73;G11B5/725;G11B5/82 |
主分类号 |
G11B5/73 |
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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