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. 14, 1996
Filed:
Nov. 14, 1994
Nick Holonyak, Jr, Urbana, IL (US);
Tim A Richard, Batavia, IL (US);
Mark R Keever, Sunnyvale, CA (US);
Fred A Kish, San Jose, CA (US);
Chun Lei, Sunnyvale, CA (US);
Serge Rudaz, Sunnyvale, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
LEDs and other semiconductor devices fabricated with III-V materials and having exposed Al-bearing surfaces passivated with native oxides are disclosed. A known high temperature water vapor oxidation process is used to passivate the exposed layers of Al-bearing III-V semiconductor materials in confined-emission spot LEDs and other light emitting devices. These devices exhibit greatly improved wet, high temperature operating life, with little to no degradation in light output when exposed to such conditions.