Article: California Inventors Develop Hard Disk Drive Electric Potential Control Method

ALEXANDRIA, Va., June 21 -- Peter Michael Baumgart, Bernhard Knigge and Mathew Mate, all from San Jose, Calif., have developed a method for actively controlling electric potential at the head/disk interface of a magnetic recording disk drive.

According to the U.S. Patent & Trademark Office: "An electrical potential difference between a slider body and a hard disk of a hard disk drive is eliminated based on the flying-height spacing of the slider body between the slider body and the hard disk. A predetermined bias voltage is applied between the slider body and the hard disk that includes a direct current (DC) component and an alternating current (AC) component and that is based on the ...

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