Back to results
US 8,797,671 B2Granted
Excitation of airbearing oscillation with tar nearfield device for touchdown detection
AssigneeHGST Netherlands B.V.
InventorsOscar J. Ruiz, Erhard Schreck
Life of this patent
Estimating the term…
Abstract
In one general embodiment, a magnetic head includes a slider having a media-facing surface; and a device coupled to the slider and being selectively extendible for selectively contacting a magnetic medium at a frequency of between about 200 and about 600 kHz. Other magnetic heads and methods of use are described according to additional embodiments.
Claims15
A magnetic head, comprising:
- a slider having a media-facing surface;
- and
- a device coupled to the slider and being selectively extendible for selectively contacting a magnetic medium at a frequency of between about 200 and about 600 kHz;
- wherein the device is configured to expand and contract at the frequency upon being repeatedly heated and cooled for inducing the contacting of the magnetic medium at the frequency;
- wherein the device has a time constant of thermal protrusion of less than about 0.4 microsecond for a protrusion of 1 nm.
2 more elements
A magnetic data storage system, comprising:
- a slider having a media-facing surface;
- a magnetic medium;
- a device coupled to the slider and being selectively extendible for selectively and repeatedly contacting the magnetic medium for inducing and maintaining an oscillation in a flying height of the slider relative to the medium;
- a drive mechanism for passing the magnetic medium over the at least one slider;
- and
- a controller electrically coupled to the device for controlling operation of the device;
- wherein the device is configured to expand and contract at a frequency upon being repeatedly heated and cooled for inducing the repeated contacting of the magnetic medium at the frequency;
- wherein the device has a time constant of thermal protrusion of less than about 0.4 microsecond for a protrusion of 1 nm.
5 more elements
Dependencies are inferred from the claim text.