Fuzzy and time-suboptimal control for dual track following and seeking of the magnetic hard disk drive

2003 ◽  
Author(s):  
E.L. Branch ◽  
M. Bikdash ◽  
A. Homaifar
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Suboptimal Control ◽  
Magnetic Hard Disk ◽  
Time Suboptimal Control

Analog Frontend for Tribo-Current-Based Fly-Height Sensor for Magnetic Hard Disk Drive

2018 ◽  
Vol 65 (2) ◽  
pp. 556-566
Author(s):  
Arup Polley ◽  
Pankaj Pandey ◽  
Bryan E. Bloodworth ◽  
Costin Cazana
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Magnetic Hard Disk ◽  
Fly Height

Novel Magnetic Micro-Tweezers Leveraging on Magnetic Hard-Disk Drive Technology

2006 ◽  
Author(s):  
M. L. Chan ◽  
G. M. Jaramillo ◽  
D. A. Horsley
Keyword(s):  
Image Processing ◽  
Hard Disk Drive ◽  
Particle Tracking ◽  
Magnetic Particles ◽  
Hard Disk ◽  
Disk Drive ◽  
Video Capture ◽  
Magnetic Tweezer ◽  
Particle Tracking Algorithm ◽  
Magnetic Hard Disk

We report the implementation of a magnetic tweezer using an inductive write head from a hard-disk drive for applying forces to micro-magnetic particles in a microscopy setup. Forces are generated by magnetic particles in reaction to the localized fields across the inductive head gap. This allow for mechanical manipulation and measurement of particles in fluid. The displacement is measured through image processing and particle tracking algorithm from the video capture data. We demonstrated the magnetic tweezer system with application to 1-2 μm paramagnetic and 4.5 μm ferromagnetic microparticles and measured forces in the range of 0.1–4 pN.

Tribochemical Polishing of Aluminum Oxide in the Atmosphere of CHF3

2005 ◽  
Author(s):  
Takao Soejima ◽  
Katsuyuki Okubo ◽  
Ken’ichi Hiratsuka ◽  
Yukihiro Sakamoto
Keyword(s):  
Aluminum Oxide ◽  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Gaseous Atmosphere ◽  
Radical Reactions ◽  
Thermally Stable ◽  
Gas Atmosphere ◽  
Tribochemical Processes ◽  
Magnetic Hard Disk

Fluorinated hydrocarbon has been used as lubricants on the surface of magnetic hard disk drive. This is because this compound is thermally stable. However it has been found that fluorinated hydrocarbon was degraded on the surface during friction to generate radicals1,2). Therefore we considered that hard ceramics will be worn out in the gaseous atmosphere of fluorinated hydrocarbon by radical reactions. If the interaction of gas to ceramics is strong, we can expect that the surface will be polished through tribochemical processes. In the present paper, we investigated the characteristic of tribochemical polishing of aluminum oxide against glass in CHF3 gas atmosphere.

Magnetic hard disk drive form factor evolution

1993 ◽  
Vol 29 (6) ◽  
pp. 4065-4067 ◽  
Author(s):  
E.G. Grochowski ◽  
R.F. Hoyt ◽  
J.S. Heath
Keyword(s):  
Form Factor ◽  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Magnetic Hard Disk

Magnetic Hard Disk Drive Form Factor Evolution

1995 ◽  
pp. 225-236
Author(s):  
Edward G. Grochowski ◽  
Roger F. Hoyt ◽  
John S. Heath
Keyword(s):  
Form Factor ◽  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Magnetic Hard Disk

A new circulation path for a high recording density magnetic hard disk drive

1989 ◽  
Author(s):  
Y. Yamaguchi ◽  
K. Matsubara ◽  
T. Shibuya ◽  
M. Tokuyama ◽  
H. Nishida ◽  
...  
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Recording Density ◽  
Magnetic Hard Disk

High-bandwidth high-accuracy rotary microactuators for magnetic hard disk drive tracking servos

1998 ◽  
Vol 3 (3) ◽  
pp. 156-165 ◽  
Author(s):  
T. Hirano ◽  
Long-Sheng Fan ◽  
Wen Y. Lee ◽  
J. Hong ◽  
W. Imaino ◽  
...  
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
High Accuracy ◽  
High Bandwidth ◽  
Magnetic Hard Disk
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