Dynamic magnetic information storage or retrieval – Head mounting – Disk record
Reexamination Certificate
2007-05-14
2010-10-26
Heinz, A. J. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head mounting
Disk record
C360S234200
Reexamination Certificate
active
07821739
ABSTRACT:
A metal foil disk offers some of the best characteristics of both the hard disk and floppy disk for digital data storage. One embodiment uses an opposed slider air bearing arrangement that provides advantages when used with a high speed metal foil disk in either a fixed or removable format. Use is made of the fact that the opposing sliders interact through their influence on the flexible disk that is sandwiched between them. Asymmetry of opposing air bearings may be created by etching the air bearing pad opposite the recording element pad to a depth sufficient that the flying height and air film stiffness of the opposing pad reach desired levels. The result is an air bearing interface with low flying height and high stiffness over the recording element opposed by a high flying height and low stiffness on the other side of the disk. This air bearing interface provides an enhanced dynamic flexibility to the metal foil disk when it is subjected to mechanical shock. As a result, the opposed slider arrangement with metal foil disk is able to avoid contact and impact when subjected to substantial levels of mechanical shock. Thus, wear and damage to slider and disk surfaces are reduced as well as the possibility of lost recorded data. This makes the metal foil disk a strong candidate as a rotating storage medium for mobile and portable applications where a shock environment is common.
REFERENCES:
patent: 4214287 (1980-07-01), Stromsta et al.
patent: 4673996 (1987-06-01), White
patent: 4811143 (1989-03-01), Ohashi et al.
patent: 4870519 (1989-09-01), White
patent: 4974106 (1990-11-01), White
patent: 5377060 (1994-12-01), Nigam
patent: 5404256 (1995-04-01), White
patent: 4673996 (1997-02-01), White
patent: 5636085 (1997-06-01), Jones
patent: 5726831 (1998-03-01), White
patent: 5968627 (1999-10-01), Nigam
patent: 6023393 (2000-02-01), White
patent: 6113753 (2000-09-01), Washburn
patent: 6115219 (2000-09-01), Hall
patent: 6222703 (2001-04-01), Osaka et al.
patent: 6243232 (2001-06-01), Osaka
patent: 6297937 (2001-10-01), Schar
patent: 6359753 (2002-03-01), Osaka
patent: 6487049 (2002-11-01), Hall
patent: 6496332 (2002-12-01), Okazaki
patent: 6580584 (2003-06-01), Hall
patent: 6583959 (2003-06-01), Hall
patent: 6947257 (2005-09-01), Hall
patent: 6954339 (2005-10-01), Bement et al.
patent: 7064931 (2006-06-01), Hutchinson
patent: 2002/0003682 (2002-01-01), Kakuno
White, J.W.,Slider Air Bearing Design Enhancements for High Speed Flexible Disk Recording, Journal of Tribology, vol. 127, pp. 522-529, Jul. 2005.
White, J.W.,A Uniform Flying Height Rotary Actuated Air Bearing Slider, presented International Magnetics Conference, Apr. 1986, Phoenix, Arizona, also published IEEE Transaction. Magnetics, Mag-22, No. 5, pp. 1028-1030, Sep. 1986.
White, J.W.,An Air Bearing Slider With Uniform Flying Height and Fast Take-Off Characteristics, presented 1986 ASME/ASLE Tribology Conference, Pittsburgh, PA,also published ASLE Tribology and Mechanics of Magnetic Storage Systems, SP-21, pp. 96-101, (Aug. 2007).
White, J.W.,Dynamic Response of the Transverse Pressure Contour Slider, Department of Mechanical Engineering and Institute for Information Storage Technology, Santa Clara University, pp. 72-82. (Aug. 2007).
White, J.W.,Flying Characteristics of the Transverse and Negative Pressure Contour(“TNP”)Slider Air Bearing, contributed toThe American Society of Mechanical Engineers for presentation at the ASME/STLE Joint Tribology Conference, San Francisco, CA., Oct. 13-17, 1996.
White, J.W., et al.,A Factored Implicit Scheme for the Numerical Solution of the Reynolds Equation at Very Low Spacing, Journal of Lubrication Technology, vol. 102, Jan. 1980.
White, J.W.,A Study of Low Flying Height Heads for Stretched Surface Recording, Tribology and Mechanics of Magnetic storage Systems, vol. IV. (Aug. 2007).
Benson. R.C., et al.,Deflection of a Very Flexible Spinning Disk Due to a Stationary Transverse Load, Transactions of the ASME, vol. 45, Sep. 1978.
Adams, G.G.,Procedures for the Study of the Flexible-Disk to Head Interface, IBM J. Res. Develop., vol. 24, No. 4, Jul. 1980.
Wu, R.Y., et al.,The Effect of Disk Warpage/Skew on the Deflection and Vibration of a Flexible Disk Spinning Above a Baseplate and in Contact with a Point-Head, Transactions of the ASME, vol. 119, Jan. 1997.
Antek Peripherals, Inc.
Heinz A. J.
Townsend and Townsend / and Crew LLP
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