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US 8,542,453 B2Granted
Inspection method and inspection apparatus of magnetic disk
AssigneeHitachi High-Technologies Corporation
InventorsKyoichi Mori, Masanori Fukawa
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AssigneeHitachi High-Technologies Corporation
InventorsKyoichi Mori, Masanori Fukawa
Estimating the term…
An inspection method and inspection apparatus of a magnetic disk are provided. A gliding test and a certification test are performed at the same time by simultaneously moving a head for the certification test and a head for the gliding test with a heat distortion utilization mechanism (a micro thermal actuator) along a recording surface of the magnetic disk during rotation at a predetermined revolving speed. A flying height of the head for the gliding test is determined according to a revolving speed of the disk. When the flying height of the head for gliding test is determined according to the revolving speed at the certification test, the head for the gliding test is adjusted to a desired height by adjusting a variation of the heat distortion utilization mechanism disposed on the head for the gliding test. The gliding and certification inspections can be performed at the same time.
An inspection method of a magnetic disk, performing a gliding test and a certification test at the same time by simultaneously moving a head for the certification test and a head for the gliding test with a heat distortion utilization mechanism along a recording surface of the magnetic disk during a rotation of the magnetic disk at a predetermined revolving speed, wherein the heat distortion utilization mechanism to adjust a distance between the head for the gliding test and the recording surface of the magnetic disk according to an applied power.
An inspection apparatus of a magnetic disk, comprising:
Dependencies are inferred from the claim text.