The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 2010
Filed:
Dec. 23, 2008
Martin Yu-wen Chen, Santa Clara County, CA (US);
John Contreras, Palo Alto, CA (US);
Luiz M. Franca-neto, Santa Clara County, CA (US);
Bernhard E. Knigge, Santa Clara County, CA (US);
Martin Yu-Wen Chen, Santa Clara County, CA (US);
John Contreras, Palo Alto, CA (US);
Luiz M. Franca-Neto, Santa Clara County, CA (US);
Bernhard E. Knigge, Santa Clara County, CA (US);
Hitachi Global Storage Technologies Netherlands, B.V., Amsterdam, NL;
Abstract
In a method of head-disk contact detection in a hard disk drive, a Radio Frequency (RF) carrier signal is injected into a slider which is flying above a surface of a disk in a hard disk drive. A modulated version of the RF carrier signal is received from the slider. The modulated version of the RF carrier signal is demodulated to achieve a demodulated signal. A signal spectrum of a range of frequencies in the demodulated signal is monitored for activity indicative of a contact between a head of the slider and the surface of the disk. An occurrence of the contact is determined based upon an occurrence of the activity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile