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. 10, 2011
Filed:
Aug. 28, 2007
Koji Shimazawa, Tokyo, JP;
Kosuke Tanaka, Tokyo, JP;
Takaaki Domon, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A laser diode is fixed to a light source support substrate and a first surface of a slider substrate is fixed to a second surface of the light source support substrate; therefore, the slider substrate and the laser diode are kept in a fixed positional relation. Since the laser diode faces a light entrance face of a core, long-distance propagation of light as in the conventional technology does not occur, and light emitted from a light emitting element is guided well to a medium-facing surface while permitting some mounting error and coupling loss of light. A spot size w of a light intensity distribution along the X-axis in the XY plane including an incident-light centroid position on the light entrance face is set larger than a thickness of the core, whereby variation in incidence efficiency is well suppressed against positional deviation.