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:
Dec. 22, 2015
Filed:
Jun. 30, 2014
Tdk Corporation, Tokyo, JP;
Makoto Moriya, Tokyo, JP;
Hiroshi Kiyono, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
Using a thermally assisted magnetic recording head, reference signals are recorded into a magnetic recording medium; reproduction signal intensity of the reference signals is measured in a state where the thermally assisted magnetic head has been moved in the track width direction from the track width center of the track where the reference signals are recorded; a mean signal output of each sector in the track where the reference signals are recorded is calculated from the measurement results of the reproduction signal intensity of the reference signals; and the recording characteristics of a thermally assisted magnetic head are evaluated based upon the mean signal output of the sectors.