Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-10-23
2007-10-23
Korzuch, William R. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S031000
Reexamination Certificate
active
11153186
ABSTRACT:
A method and system for determining localized contact potential voltages and localized clearance data between a slider body and a hard disk of a hard disk drive. In embodiments of the present invention, a plurality of direct current (DC) pulses are applied between said slider body and a discreet location of the hard disk. In embodiments of the present invention, the discreet location of the hard disk comprises a portion of a data track of the hard disk. In embodiments of the present invention, a variation in the clearance of the slider body is determined when a given voltage is applied. Furthermore, a first set of DC pulses has a positive
egative bias while a second set of DC pulses has a negative/positive bias. The voltage of the sets of DC pulses is increased until a contact between the slider body and the hard disk is detected.
REFERENCES:
patent: 5136250 (1992-08-01), Abdelli
patent: 5153785 (1992-10-01), Muranushi et al.
patent: 5453884 (1995-09-01), Ohta et al.
patent: 6359746 (2002-03-01), Kakekado et al.
patent: 6529342 (2003-03-01), Feng et al.
patent: 6700724 (2004-03-01), Knippenberg et al.
patent: 7016139 (2006-03-01), Baumgart et al.
patent: 2002/0071196 (2002-06-01), Chapin et al.
patent: 2003/0043497 (2003-03-01), Riddering et al.
patent: 2006/0002001 (2006-01-01), Fong et al.
patent: 57060566 (1982-04-01), None
patent: 62159385 (1987-07-01), None
patent: 3283152 (1991-12-01), None
patent: 5223781 (1993-08-01), None
patent: 5273276 (1993-10-01), None
patent: 9097483 (1997-04-01), None
“Non-Destructive Measurement of the Lubricant Distribution on Magnetic Disks” IBM TDB, Jul. 1985, pp. 695ff.
“Tribocharging of the magnetic hard disk drive head-disk interface” Journal of Applied Physics, vol. 91, No. 7, pp. 4631 ff.
“Air Bearing Magnetic Head Slider Providing a Correlation Technique Between Readback Signal Modulation and Head-To-Disk Spacing Variation . . . ” IBM TDB, Dec. 19833, pp. 3364ff.
“Influence of Contact Potential on Slide-Disk Spacing: Simulation and Experiment” IEE Mag vol. 40, No. 4, pp. 3165ff.
Advances in Information Storage and Processing Systems, 1995 vol. 1, pp. 49ff (abstract only).
Baumgart Peter Michael
Duwensee Maik
Knigge Bernhard E.
Hitachi Global Storage Technologies - Netherlands B.V.
Korzuch William R.
Olson Jason
LandOfFree
Disk drive with localized clearance and contact potential... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disk drive with localized clearance and contact potential..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive with localized clearance and contact potential... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3857608