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:
Oct. 14, 2008
Filed:
Jun. 30, 2004
Edmund Bruno Fanslau, Jr., San Jose, CA (US);
Mark Re, Pittsburgh, PA (US);
Edmund Bruno Fanslau, Jr., San Jose, CA (US);
Mark Re, Pittsburgh, PA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
A head gimbal assembly having a suspension and a read/write head is provided. The read write head is attached to a flexure tongue of the suspension. Heating elements on arms of the suspension, set on either side of the suspension tongue, are used to alter flight characteristics of the read/write read such as pitch and roll. Due to differences in the coefficients of thermal expansion of the materials that comprise the arms, the arms bend when heated. Varying the heat output of the heating elements changes the temperatures of the arms, which changes the degree to which the arms are bent. The heating elements can be portions of traces in a trace layer. Control circuitry is provided to control the heating of the heating elements to maintain desired values of the flight characteristics.