Invention Grant
US07719785B2 Disk drive device, manufacturing method thereof, and method for setting heater power value for a heater for adjusting a clearance
有权
磁盘驱动装置及其制造方法以及用于调节间隙的加热器的加热器功率值的设定方法
- Patent Title: Disk drive device, manufacturing method thereof, and method for setting heater power value for a heater for adjusting a clearance
- Patent Title (中): 磁盘驱动装置及其制造方法以及用于调节间隙的加热器的加热器功率值的设定方法
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Application No.: US12284852Application Date: 2008-09-24
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Publication No.: US07719785B2Publication Date: 2010-05-18
- Inventor: Masato Taniguchi , Kenji Tasaka , Yasunori Kawamoto , Takuma Ito , Masaharu Kawamura
- Applicant: Masato Taniguchi , Kenji Tasaka , Yasunori Kawamoto , Takuma Ito , Masaharu Kawamura
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Townsend and Townsend and Crew LLP
- Agent Patrick Duncan
- Priority: JP2007-252410 20070927
- Main IPC: G11B21/02
- IPC: G11B21/02 ; G11B27/36
Abstract:
Embodiments of the present invention help to accomplish accurate and reliable clearance control. In one embodiment of the present invention, a disk drive device adjusts the clearance between a head element portion and a disk with a heater on a slider. The clearance control according to the present embodiment incorporates the variation in heater power efficiency in the clearance variation depending on the radial position. The clearance variation in a unit of heater power varies depending on the radial position. Taking account of the variation in the heater power efficiency in the thermal fly-height control (TFC) depending on the radial position in addition to the clearance variation between the head element portion and the disk caused by variation in fly-height or attitude, accomplishes more accurate TFC.
Public/Granted literature
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