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:
Sep. 18, 2012
Filed:
May. 06, 2011
Jia-yang Juang, Changhua, TW;
Hal J. Rosen, Los Gatos, CA (US);
Barry Cushing Stipe, San Jose, CA (US);
Timothy Carl Strand, San Jose, CA (US);
Petrus Antonius Vanderheijden, San Jose, CA (US);
Jia-Yang Juang, Changhua, TW;
Hal J. Rosen, Los Gatos, CA (US);
Barry Cushing Stipe, San Jose, CA (US);
Timothy Carl Strand, San Jose, CA (US);
Petrus Antonius VanDerHeijden, San Jose, CA (US);
Hitachi Global Storage Technologies Netherland B.V., Amsterdam, NL;
Abstract
A thermally-assisted recording (TAR) disk drive uses a 'wide-area' heater with 'shingled' recording. In shingled recording, the write head pole tip is wider than the read head in the cross-track direction and writes magnetic transitions by making a plurality of consecutive circular paths that partially overlap. The non-overlapped portions of adjacent paths form the data tracks, which are thus narrower than the width of the write pole tip. The data tracks are grouped into annular bands and when data is to be rewritten, all of the data tracks in an annular band are also rewritten. The wide-area heater may be a waveguide with an output end that generates a heated area on the disk recording layer which is wider than the cross-track width of the write pole tip. It has been determined that the use of a wide-area heater with shingled recording does not result in any significant adjacent track erasure (ATE).