METHOD OF MANUFACTURING DISK DRIVE UNIT
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Apr 14, 2014
filing date -
Apr 25, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method manufactures a disk drive unit that includes a rotor to rotate a disk set thereon, and a fixed body to rotatably support the rotor via a lubricant, by cutting the rotor integrally including a sleeve surrounding a shaft of the fixed body and a hub on which the disk is set, by a wavy cutting process to form a dynamic pressure generating groove to generate a dynamic pressure in the lubricant and having wavy undulations at a bottom part thereof, and cutting a surface of the rotor opposing a ring-shaped member that is included in the fixed body and covers a gas-liquid interface of the lubricant provided between the rotor and the fixed body, by a wavy cutting process to form an air flow generating groove to generate an air flow between the rotor and the ring-shaped member and having wavy undulations at a bottom part thereof.
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