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:
Feb. 14, 2012
Filed:
Apr. 29, 2010
Masatoshi Iwata, Chiyoda-ku, JP;
Ryo Sakamoto, Chiyoda-ku, JP;
Masatoshi Iwata, Chiyoda-ku, JP;
Ryo Sakamoto, Chiyoda-ku, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Abstract
A novel vertical resonator type light emitting diode of which has a simplified structure of the reflector layer of its light emitting side an which is resistant to declination of its emission output power towards a high temperature range, has an active layer, and a first reflector layerat its light reflecting side and a second reflector layerat its light emitting side which are formed to sandwich the active laterbetween them, wherein each of the first reflector layerand the second reflector layeris structured to comprise a plurality of pairs of two alternate semiconductor layers formed which are different from each other in refractive index, and the second reflector layerhas a number of such pairs which is not less than 1/10 and not more than ⅓ of that which said first reflector layerhas. The emission output power can be enhanced when the first reflector layer has a number of such pairs which is not less than 11 and not more than 41.