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:
Oct. 03, 2006
Filed:
Jan. 30, 2004
Satoshi Watanabe, Cupertino, CA (US);
Stephen A. Stockman, Morgan Hill, CA (US);
Satoshi Watanabe, Cupertino, CA (US);
Stephen A. Stockman, Morgan Hill, CA (US);
Philips Lumileds Lighting Company, LLC, San Jose, CA (US);
Abstract
A semiconductor light emitting device includes a light emitting layer sandwiched between two spacer layers. The difference between the net polarization in at least one of the spacer layers and the net polarization in the light emitting layer is less than in the device with conventional spacer layers, such as GaN spacer layers. The difference between the net polarization in at least one of the spacer layers and the net polarization in the light emitting layer is less than about 0.02 C/m. In some embodiments, at least one of the spacer layers is a quaternary alloy of aluminum, indium, gallium, and nitrogen.