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. 10, 2005
Filed:
Jun. 12, 2003
Applicants:
Jerome C. Bhat, San Francisco, CA (US);
Michael J. Ludowise, San Jose, CA (US);
Daniel A. Steigerwald, Cupertino, CA (US);
Inventors:
Jerome C. Bhat, San Francisco, CA (US);
Michael J. Ludowise, San Jose, CA (US);
Daniel A. Steigerwald, Cupertino, CA (US);
Assignee:
Lumileds Lighting U.S., LLC, San Jose, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L027/15 ; H01L031/12 ; H01L033/00 ;
U.S. Cl.
CPC ...
Abstract
A dielectric layer is formed on the mesa wall of a flip-chip LED. The dielectric layer is selected to maximize reflection of light incident at angles ranging from 10 degrees towards the substrate to 30 degrees away from the substrate. In some embodiments, the LED is a III-nitride device with a p-contact containing silver, the dielectric layer adjacent to the mesa wall is a material with a low refractive index compared to GaN, such as AlO.