DISK APPARATUS AND METHOD FOR DETECTING CONTACT BETWEEN HEAD SLIDER AND DISK

PROBLEM TO BE SOLVED: To solve the problem that contact between a slider and a disk cannot be detected in a magnetic disk apparatus due to small vibration of the slider generated when a contact occurs. SOLUTION: A slider 13 is finely vibrated in a slider flying height direction and/or in an off-trac...

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Bibliographic Details
Main Authors SHIMIZU HIROKI, KODAIRA HIDEKAZU, JO KINKOKU, KUROKI KENJI
Format Patent
LanguageEnglish
Published 04.11.2010
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To solve the problem that contact between a slider and a disk cannot be detected in a magnetic disk apparatus due to small vibration of the slider generated when a contact occurs. SOLUTION: A slider 13 is finely vibrated in a slider flying height direction and/or in an off-track direction to induce resonance of a head gimbal assembly 27. In this state, a contact between the slider 13 and a magnetic disk 2 is detected, to reliably detect a contact between the slider 13 and a lubricant layer 31 applied to a surface of the magnetic disk 2, with high sensitivity. Contact can be detected before start of a solid contact between the slider 13 and the magnetic disk 2, and a vibration in the off-track direction is detected. Therefore, the contact between the slider 13 and the magnetic disk 2 can be detected with high accuracy without impairing the reliability of head-disk interface. COPYRIGHT: (C)2011,JPO&INPIT
Bibliography:Application Number: JP20090099444