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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.:

US 9082440 B1

PDFFull Text
Date of Patent:
Jul. 14, 2015

Filed:

Jul. 23, 2012

Using first and second resistive sensor bias levels to detect head-to-disk contact and/or clearance

Applicants:

Michael Thomas Johnson, Minneapolis, MN (US);

Manuel Charles Anaya Dufresne, Edina, MN (US);

Xuan Zheng, Savage, MN (US);

Dongming Liu, Eden Prairie, MN (US);

Inventors:

Michael Thomas Johnson, Minneapolis, MN (US);

Manuel Charles Anaya Dufresne, Edina, MN (US);

Xuan Zheng, Savage, MN (US);

Dongming Liu, Eden Prairie, MN (US);

Assignee:

SEAGATE TECHNOLOGY LLC, Cupertino, CA (US);

Attorney:

Hollingsworth Davis, LLC

Primary Examiner:

Mirellys Jagan

Int. Cl.
CPC ...
G01N 25/00 (2006.01); G01K 13/00 (2006.01); G01K 1/00 (2006.01); G01K 7/00 (2006.01); G11B 5/60 (2006.01);
U.S. Cl.
CPC ...
G11B 5/607 (2013.01); G11B 5/6076 (2013.01);
Abstract

A bias signal is applied to a resistive thermal sensor located proximate a magnetic media reading surface of a magnetic sensor. The bias signal is modulated between first and second bias levels. First and second resistances of the resistive thermal sensor corresponding to the first and second bias levels are measured. Based a difference between the first and second resistances caused by in increase in thermal conductivity between the magnetic sensor and a medium as the magnetic head gets closer to the medium, at least one of a spacing and a contact between the magnetic sensor and the medium are determined.

Find Patent Forward Citations

Johnson, Michael. (2015). Using first and second resistive sensor bias levels to detect head-to-disk contact and/or clearance (U.S. Patent No. 9082440). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9082440

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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