| 摘要 |
A disk usable with a hard disk drive includes a first texture recessively formed in a surface of a substrate of the disk and textured in a first pattern of a first net shape to have a first cross angle where line patterns of the first pattern cross each other, and a second texture formed on the surface of the disk substrate independently of the first texture and textured in a second pattern of a second net shape to have a second cross angle where second line patterns of the second pattern cross each other, the second cross angle being relatively smaller than the first cross angle. The first and second textures of the disk also have first and second surface roughness created by grooves in the first and second patterns. Fly-ability of the magnetic head is improved by an increase in surface roughness or a cross angle at which patterns of a texture cross each other is increased, which decreases excessive absorption and friction generated during disk rotation, and prevents deterioration of the fly-ability of the magnetic head due to low linear velocity. Simultaneously, a bit error rate (BER) can be improved by improving an orientation ratio (OR) that improves a magnetic characteristic of the disk. Thus, the quality of a small form factor (SFF) hard disk drive (HDD) is improved.
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