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:
Nov. 30, 2004
Filed:
Jan. 24, 2003
Denselight Semiconductors Pte Ltd, Singapore, SG;
Abstract
The present invention relates to a semiconductor photodetector. The photodetector is a waveguide photodetector, which comprises: a waveguide ( ) having a III-V ridge structure including an active layer ( ); a semiconductor layer ( ) deposited on top of the ridge structure; and, metal detector electrodes (not shown) on the surface of the higher refractive index semiconductor layer ( ). The semiconductor layer ( ) has a higher refractive index than the waveguide structure ( ). The ridge structure is configured to widen along the length of the waveguide ( ) such that light passing through the active layer ( ) of the waveguide couples more efficiently up into the higher refractive index semiconductor layer ( ).