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:
Jun. 22, 2010
Filed:
Sep. 05, 2008
Matobu Kikuchi, Tokyo, JP;
Matobu Kikuchi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A semiconductor photodetector includes a semiconductor substrate of a first conductivity type, a light absorption layer of the first conductivity type on the semiconductor substrate and absorbing light, a diffraction grating layer on the light absorption layer and including a diffraction grating diffracting light, a first light transmissive layer of a second conductivity type on the diffraction grating layer and transmitting light, and a second light transmissive layer of the first conductivity type on the diffraction grating layer and surrounding the first light transmissive layer, the second light transmissive layer transmitting light. The diffraction grating surrounds a region of the diffraction grating layer that is directly below the first light transmissive layer.