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:
Mar. 19, 2013
Filed:
Feb. 24, 2012
Yasuhiko Iwanabe, Kodaira, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Yasuhiko Iwanabe, Kodaira, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A thermally assisted recording magnetic head is provided in which a magnetic recording medium can be irradiated with light having a spot size reduced in the submicron order with high total optical propagation efficiency. In a magnetic head, a spot size converter that propagates the light from an optical source in the magnetic head is provided adjacent to a main pole. The spot size converter includes a cover layer having a refractive index lower than that of a clad material and formed in contact with the optical waveguide core, and is formed in a shape composed of a substantially rectangular shape in a light traveling direction and a tapered shape where the width is increased toward the bottom surface of the magnetic head. The optical waveguide core having the cover layer formed is vertically interposed between multi-mode-thin-film-like cores that can excite a first or higher-order optical waveguide mode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile