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Title of Journal: Microsyst Technol

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Abbravation: Microsystem Technologies

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Springer-Verlag

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10.1002/mmnd.19790260111

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1432-1858

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Position error reduction in magnetic disk drives using a head gimbal assembly with radial head motion capability

Authors: Dong-Ho Oh, Seong-Woo Kang,

Publish Date: 2005/07/14
Volume: 11, Issue:8-10, Pages: 728-733
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Abstract

Reducing the head positioning error is important to achieve higher track density in hard disk drives. In this paper, it is shown that the head off-track due to disk vibration can be reduced by using a head gimbal assembly capable of moving not only vertically to disk surface but also radially across the track. We find the optimal geometric relationship to minimize the head off-track due to disk vibration. The relationship is obtained based on precise mathematical modeling of head off-track mechanism due to disk vibration. Some examples of head gimbal assembly (HGA) with radial head motion capability, which satisfy such optimal relationship, are also proposed. It is experimentally found that the proposed optimal HGA can reduce non-repeatable run-out (NRRO) position error signal (PES) significantly. Since it reduces NRRO PES during servo track writing as well, the written-in portion of repeatable run-out PES can be also significantly reduced.The authors would like to thank Young-Hoon Kim, Yun-Sik Han and Tae-Yeon Hwang from Samsung Advanced Institute of Technology for their support in preparing this paper. The work on this paper was jointly developed and supported by Storage System Division, Samsung Electronics, Ltd., as well as Samsung Information Systems America, Inc., which is gratefully acknowledged.


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Other Papers In This Journal:

  1. Position error reduction in magnetic disk drives using a head gimbal assembly with radial head motion capability
  2. Micro liquid rotor operated by surface-acoustic-wave
  3. Robust embedding of longitudinal position into tape servo signals
  4. Analysis of PDT noise originating from driving method of a HDD spindle motor
  5. Auto-focusing actuator and camera module including flexible diaphragm for mobile phone camera and wireless capsule endoscope
  6. Novel heat dissipation design for light emitting diode applications
  7. Hot embossing of thermoplastic multilayered stacks
  8. Piezoelectric in-plane microplate resonators based on contour and flexure-actuated modes
  9. A review of fabrication processes for vertical comb drives
  10. Computational fluid dynamics for effects of coolants on on-chip cooling capability with carbon nanotube micro-fin architectures
  11. Cells adhered and cultured on microcantilevers
  12. LTO cartridge reel deflection under tape packing stresses
  13. In-situ fabrication of an out-of-plane microlens with pre-definable focal length
  14. Dynamic calibration method of inertial measurement units
  15. Two temperature theory of initially stressed electro-microstretch medium without energy dissipation
  16. Design of compact and wide bandwidth SPDT with anti-stiction torsional RF MEMS series capacitive switch
  17. Elastic coefficient analysis on planar S-shaped micro spring under high impact load
  18. Mechanical vibration and critical speeds of rotating composite laminate disks
  19. Precise measurement of angular position and speed of spindle motor during spin-up by computing differences in winding current rise time
  20. Motor noise generation and prediction for high spinning speed hard disk drive
  21. Study on the effect of heating plate thickness on the micro induction heater for thermal bubbles generation
  22. Analysis of electromagnetic interference of a capacitive RF MEMS switch during switching

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