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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.:

US 9691931 B1

PDFFull Text
Date of Patent:
Jun. 27, 2017

Filed:

Dec. 07, 2015

Materials, fabrication equipment, and methods for stable, sensitive photodetectors and image sensors made therefrom

Applicant:

Invisage Technologies, Inc., Menlo Park, CA (US);

Inventors:

Igor Constantin Ivanov, Danville, CA (US);

Edward Hartley Sargent, Toronto, CA;

Hui Tian, Cupertino, CA (US);

Assignee:

InVisage Technologies, Inc., Newark, CA (US);

Attorney:

Schwegman Lundberg & Woessner, P.A.

Primary Examiner:

Tu-Tu Ho

Int. Cl.
CPC ...
H01L 31/00 (2006.01); H01L 31/101 (2006.01); H01L 31/032 (2006.01); H01L 31/109 (2006.01); H01L 31/0336 (2006.01); H01L 31/0352 (2006.01); H01L 31/0224 (2006.01); H01L 31/0384 (2006.01); H01L 31/09 (2006.01); H01L 27/146 (2006.01);
U.S. Cl.
CPC ...
H01L 31/101 (2013.01); H01L 31/0224 (2013.01); H01L 31/032 (2013.01); H01L 31/0324 (2013.01); H01L 31/0336 (2013.01); H01L 31/03845 (2013.01); H01L 31/035218 (2013.01); H01L 31/09 (2013.01); H01L 31/109 (2013.01); H01L 27/14603 (2013.01); Y02E 10/50 (2013.01);
Abstract

Optically sensitive devices include a device comprising a first contact and a second contact, each having a work function, and an optically sensitive material between the first contact and the second contact. The optically sensitive material comprises a p-type semiconductor, and the optically sensitive material has a work function. Circuitry applies a bias voltage between the first contact and the second contact. The optically sensitive material has an electron lifetime that is greater than the electron transit time from the first contact to the second contact when the bias is applied between the first contact and the second contact. The first contact provides injection of electrons and blocking the extraction of holes. The interface between the first contact and the optically sensitive material provides a surface recombination velocity less than 1 cm/s.

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