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:
May. 16, 2006
Filed:
Sep. 24, 2004
Christoph H. Grein, Wheaton, IL (US);
Silviu Velicu, Westmont, IL (US);
Sivalingam Sivananthan, Naperville, IL (US);
Christoph H. Grein, Wheaton, IL (US);
Silviu Velicu, Westmont, IL (US);
Sivalingam Sivananthan, Naperville, IL (US);
EPIR Technologies, Inc., Bolingbrook, IL (US);
Abstract
A photosensitive diode has superlattice exclusion region formed from a stack of first and second layers. The first layers are penetrated by minority carriers using quantum mechanical tunneling and reduce minority carrier mobility. The second layers have a sufficiently low bandgap that the tunneling minority carriers can reach an active region of the diode. The process of successively forming first and second layers is repeated until the exclusion region is at least three times the minority carrier diffusion length.