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:
Jun. 13, 1989
Filed:
Aug. 07, 1986
Applicant:
Inventor:
Kevin F Brennan, Atlanta, GA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 30 ; 357-4 ; 357 13 ; 357 58 ;
Abstract
A low noise doped quantum well avalanche photodector (APD) having repeated superlattice units. Where the majority carriers are electrons, each unit is formed from p.sup.+ -n.sup.+ layers of a first material having a first ionization threshold, a near intrinsic layer of a second material having a smaller ionization threshold, and a near intrinsic layer of the first material. Such an APD can be fabricated in the GaAs/AlGaAs material system.