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Disk Magnetic Test With Effective Highest Frequency Disclosure Number: IPCOM000100764D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-16

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Kurachi, K Matsui, T Tobari, A [+details]


Disclosed is a modified method to evaluate magnetic recording characteristics of heads/disks used in hard disk drives. The purpose is to get a good correlation on the sample characterization between the single head/disk parametric test and the read error rate test. (The single head/disk parametric test refers to a component-level head/disk characterization by its HI-F amplitude, resolution, etc.) This cor relation means that a statistical dispersion and relative superiority/ inferiority of the samples' quality is consistent between these two tests. A key parameter for a good correlation is the minimum magnet length written on a disk. Thus, the minimum magnet lengths of these tests should be equal.