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:
Dec. 24, 2002
Filed:
Mar. 28, 2001
Applicant:
Inventor:
Nami Yasuoka, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3/100 ;
U.S. Cl.
CPC ...
H01L 3/100 ;
Abstract
A photodetector includes a photodiode and an optical waveguide provided adjacent to the photodiode on a common substrate, wherein the optical waveguide includes a plurality of tapered optical waveguide layers separated by an intermediate layer having a uniform thickness, the thickness of the tapered optical waveguide layers increases from a first end surface away from the photodiode toward a second end surface adjacent to the photodiode.