Patent number 8797671 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "The heart of a computer is a magnetic hard disk drive (HDD) which typically includes a rotating magnetic disk, a slider that has read and write heads, a suspension arm above the rotating disk and an actuator arm that swings the suspension arm to place the read and/or write heads over selected circular tracks on the rotating disk. The suspension arm biases the slider into contact with the surface of the disk when the disk is not rotating but, when the disk rotates, air is swirled by the rotating disk adjacent an air bearing surface (ABS) of the slider causing the slider to ride on an air bearing a slight distance from the surface of the rotating disk. When the slider rides on the air bearing the write and read heads are employed for writing magnetic impressions to and reading magnetic signal fields from the rotating disk. The read and write heads are connected to processing circuitry that operates according to a computer program to implement the writing and reading functions.
"The ability for the slider to ride on an air bearing at a slight distance while functioning as a writer/reader serves as a touchdown scheme. Although undesirable, currently there are several embodiments of touchdown schemes used depending on various situational parameters. Ideally, an individual touchdown scheme would be applicable in all instances, but has not been achieved. The further universalization of touchdown schemes has proven to be difficult so far."
In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "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.
"In another general embodiment, a magnetic data storage system includes a slider having a media-facing surface; a magnetic medium; a device coupled to the slider and being selectively extendible for selectively contacting the magnetic medium for inducing 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.
"Any of these embodiments may be implemented in a magnetic data storage system such as a disk drive system, which may include a magnetic head, a drive mechanism for passing a magnetic medium (e.g., hard disk) over the magnetic head, and a controller electrically coupled to the magnetic head.
"Other aspects and advantages of the present invention will become apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate by way of example the principles of the invention."
URL and more information on this patent, see: Ruiz, Oscar J.; Schreck, Erhard. Excitation of Airbearing Oscillation with Tar Nearfield Device for Touchdown Detection. U.S. Patent Number 8797671, filed
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