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. 05, 2013
Filed:
Jan. 28, 2008
Applicant:
Yusuke Matsukura, Kawasaki, JP;
Inventor:
Yusuke Matsukura, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/72 (2006.01);
U.S. Cl.
CPC ...
Abstract
The infrared photodetector includes a contact layer formed over a semiconductor substrate, a quantum dot stackformed on the contact layerand including intermediate layersand quantum dotswhich are alternately stacked, and a contact layerformed on the quantum dot stack. One of the plurality of intermediate layers, which is in contact with the contact layer, has an n-type impurity doped regionformed on a side nearer the interface with the contact layer