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:
Jul. 15, 2014
Filed:
May. 16, 2011
Yasuhiko Iwanabe, Kodaira, JP;
Takuya Matsumoto, Tokyo, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is a thermal-assisted-magnetic-recording head capable of irradiating a magnetic recording medium with light with a spot size reduced on the submicron order with high utilization efficiency. A spot size converterfor guiding light emitted from an optical sourceinto a magnetic head is provided at a position adjacent to a magnetic main polein the magnetic head. In the spot size converter, a cover layerhaving a lower refractive index than those of a coreand a clad materialis formed between the coreand the cladand has a shape composed of a shape substantially rectangular in a light traveling direction and a taper shape having a width increasing toward the bottom surface of the magnetic head.