| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for evaluating a magnetic recording medium capable of reducing the floating height of a magnetic head. SOLUTION: From the shape curve of the surface of a magnetic recording medium with respect to the height direction along the recording/reproducing direction of the magnetic head, the maximum height in each of a plurality of different wavelength ranges is obtained, the sum of each of the maximum heights is obtained, and the magnetic recording medium is evaluated on the basis of the sum value. In the area in which the floating of the magnetic head is ensured, the maximum height Wp of a large undulation shape having the wavelength of≥2.5 mm with respect to the recording/reproducing direction of the magnetic head, the maximum height MWp of a small undulation shape having the wavelength of≤2.5 mm and≥10μm with respect to the same direction, and the maximum height Rp of a roughness shape having the wavelength of≤10μm with respect to the same direction are measured, and the Wp+MWp+Rp is compared with the required glide height value. The magnetic recording medium is evaluated on the basis of the comparison result. Further, the magnetic recording medium may be evaluated on the basis of the maximum height of the undulation shape with respect to the traveling direction of the magnetic head. COPYRIGHT: (C)2006,JPO&NCIPI
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