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. 12, 2016
Filed:
Oct. 18, 2013
Seagate Technology Llc, Cupertino, CA (US);
Leping Li, Bloomington, MN (US);
Andrew S. Menz, Shakopee, MN (US);
John F. Schmidt, Cushing, MN (US);
Stephen J. Mackin, St. Louis Park, MN (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
The application discloses embodiments of a lapping head including a sensor device in the base structure of the rotating lapping head. For operation, rotation is imparted to the lapping head through a drive motor coupled to the lapping head through a rotating shaft. As disclosed, the sensor device is electrically connected to one or more electronic components or circuitry through the rotating shaft and a rotating electrical connector coupled to the rotating shaft. In embodiments disclosed, the sensor device is an eddy current sensor configured to measure a gap dimension between a sensor element on the lapping head and a conductive platen to provide an in-situs measurement of workpiece thickness.