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. 26, 2002
Filed:
Jun. 11, 1999
Robert Eugene Frahm, Flemington, NJ (US);
Keon M. Lee, Bellemead, NJ (US);
Orval George Lorimor, Warren, NJ (US);
Dennis Ronald Zolnowski, Bridgewater, NJ (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
An improved PIN photodiode provides enhanced linearity by confining the light absorption region of the diode wholly within the depletion region. The photodiode exhibits improved linearity over prior art designs because the thickness of the absorption region is no longer a function of changes in the size of the depletion region during device operation. Keeping the absorption region wholly within the depletion region ensures that the charge carriers generated by incident illumination will increase the conductivity of the semiconductor material.