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:
Sep. 17, 2019
Filed:
Jul. 02, 2018
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 31/0352 (2006.01); H01L 31/0304 (2006.01); H01L 27/146 (2006.01); H01L 31/109 (2006.01);
U.S. Cl.
CPC ...
H01L 31/035236 (2013.01); H01L 27/14652 (2013.01); H01L 31/0304 (2013.01); H01L 31/03046 (2013.01); H01L 31/109 (2013.01);
Abstract
An infrared detector includes a quantum dot structure, and an electrode that is coupled to the quantum dot structure, wherein the quantum dot structure is obtained by stacking a plurality of structures each including a quantum dot, a first barrier layer under the quantum dot and a second barrier layer over the quantum dot to cover the quantum dots, and an intermediate layer under the first barrier layer, and wherein the first barrier layer includes a first region and a second region having a lower Al concentration than that of the intermediate layer between the first region and the intermediate layer.