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. 07, 2013
Filed:
Jun. 09, 2009
Naoki Matsushima, Chiba, JP;
Satoshi Arai, Yokohama, JP;
Takuya Matsumoto, Sunnyvale, CA (US);
Jun-ichiro Shimizu, Hadano, JP;
Irizo Naniwa, Fujisawa, JP;
Naoki Matsushima, Chiba, JP;
Satoshi Arai, Yokohama, JP;
Takuya Matsumoto, Sunnyvale, CA (US);
Jun-ichiro Shimizu, Hadano, JP;
Irizo Naniwa, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A thermally assisted magnetic recording head with highly efficient optical coupling, while guiding a laser beam from a semiconductor laser element, i.e., a light source, to a leading end thereof, eliminating an influence due to heat generated by the element, and having excellent floating characteristics. The thermally assisted magnetic recording head includes a substratehaving a first optical waveguide, a semiconductor laser element, and a sliderhaving a second optical waveguideformed on an end surface. The semiconductor laser elementis fixed on the substrateso that light emitted from the elementpropagates through the first optical waveguideand a slideris fixed on the substrateso that light emitted from the first optical waveguidepropagates through the second optical waveguide. High optical coupling efficiency is then achieved, while ensuring both heat-dissipating and floating characteristics.