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. 22, 2005
Filed:
May. 04, 1999
Applicants:
Sarath D. Gunapala, Valencia, CA (US);
Kwong Kit Choi, Brookeville, MD (US);
Sumith V. Bandara, Valencia, CA (US);
Inventors:
Sarath D. Gunapala, Valencia, CA (US);
Kwong Kit Choi, Brookeville, MD (US);
Sumith V. Bandara, Valencia, CA (US);
Assignee:
California Institute of Technology, Pasadena, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L027/146 ; H01L031/09 ;
U.S. Cl.
CPC ...
Abstract
A quantum well infrared photodetector (QWIP) that provides two-color image sensing. Two different quantum wells are configured to absorb two different wavelengths. The QWIPs are arrayed in a focal plane array (FPA). The two-color QWIPs are selected for readout by selective electrical contact with the two different QWIPs or by the use of two different wavelength sensitive gratings.