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:
May. 14, 2013
Filed:
Nov. 20, 2009
Koji Shimazawa, Tokyo, JP;
Seiichi Takayama, Tokyo, JP;
Eiji Komura, Tokyo, JP;
Osamu Shindo, Tokyo, JP;
Takashi Honda, Shatin, HK;
Koji Shimazawa, Tokyo, JP;
Seiichi Takayama, Tokyo, JP;
Eiji Komura, Tokyo, JP;
Osamu Shindo, Tokyo, JP;
Takashi Honda, Shatin, HK;
TDK Corporation, Tokyo, JP;
Abstract
A thermally-assisted magnetic recording head is provided, in which the light-source output can be adjusted according to its variation by environmental influences and over time. The head comprises: a light source; a write head element provided in a element-integration surface; an optical system provided in the element-integration surface and configured to guide a light emitted from the light source to the vicinity of one end of the write head element; and a light detector for monitoring the light-source output, provided in the element-integration surface and comprising a light-receiving surface covering an area directly above at least a portion of the optical system. This light detector with such a light-receiving surface can detect a leakage light emitted from the optical system as a monitoring light. Therefore, feedback adjustment of the light-source output can be realized to stabilize the intensity of light for thermal-assist applied to a magnetic recording medium.