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:
Apr. 07, 2015
Filed:
Aug. 12, 2013
Applicant:
Seagate Technology Llc, Cupertino, CA (US);
Inventors:
Richard E. Martin, Longmont, CO (US);
Quinn J. Haddock, Provo, UT (US);
Assignee:
Seagate Technology LLC, Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 21/02 (2006.01); G11B 21/21 (2006.01);
U.S. Cl.
CPC ...
G11B 21/21 (2013.01);
Abstract
Method and apparatus for verifying and controlling a clearance distance of an object, such as but not limited to a fly height of a read/write transducer adjacent a recording medium in a data storage device. In accordance with some embodiments, a sensor is used to sense a plurality of patterns from an adjacent surface, with each pattern being written at a different constant frequency. A final clearance distance between the sensor and the surface is established in response to a multi-frequency response ratio from the sensor and a single frequency response ratio from the sensor.