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. 04, 1997
Filed:
Jul. 21, 1993
Hirotaka Kizuki, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor laser diode having a selective PHS structure includes a semiconductor substrate having opposite first and second main surfaces, a laser diode structure disposed on the first main surface, and a PHS electrode selectively buried in the second main surface wherein the laser diode structure is located in an area defined by a first pair of parallel lines running in a direction perpendicular to a resonator length direction and a second pair of parallel lines located at the side surfaces of the semiconductor substrate, the first pair of lines being located internally of front and rear facets of the semiconductor substrate, and the PHS electrode has a length in the resonator length direction no shorter than the active region in the resonator length direction. The heat radiating characteristic is improved, especially at the laser beam emitting facet.