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.:

US 10665759 B1

Date of Patent:

May. 26, 2020

Filed:

Sep. 25, 2017

Reflective structure for light emitting devices

Applicant:

Lumileds Llc, San Jose, CA (US);

Inventors:

Erik C. Nelson, Pleasanton, CA (US);

Parijat P. Deb, San Jose, CA (US);

Assignee:

LUMILEDS LLC, San Jose, CA (US);

Attorney:

Primary Examiner:

Igwe U Anya

Int. Cl.

CPC ...

H01L 33/50 (2010.01); H01L 33/10 (2010.01); H01L 33/00 (2010.01); H01L 33/42 (2010.01); H01L 33/32 (2010.01); H01L 33/40 (2010.01); H01L 33/46 (2010.01); H01L 33/02 (2010.01); H01L 33/14 (2010.01); H01L 33/16 (2010.01);

U.S. Cl.

CPC ...

H01L 33/502 (2013.01); H01L 33/0079 (2013.01); H01L 33/10 (2013.01); H01L 33/32 (2013.01); H01L 33/405 (2013.01); H01L 33/42 (2013.01); H01L 33/46 (2013.01); H01L 33/505 (2013.01); H01L 33/025 (2013.01); H01L 33/14 (2013.01); H01L 33/16 (2013.01); H01L 2933/0025 (2013.01); H01L 2933/0091 (2013.01);

Abstract

Described is a reflector for light emitting devices. A device includes a reflector in contact with a first n-type region and a second n-type region. The reflector includes multiple layers. One layer having an index of refraction different than the other layers. The device includes a light emitting region (LER) in contact with the second n-type region, a p-type region in contact with the LER and a light extraction region (LXR) in contact with the p-type region. A majority of light escapes the device through the LXR. The reflector reflects light emitted by the LER back towards the LXR. In another device, a reflector is embedded in a n-type region of the device. The device includes a LER, a p-type region, and a wavelength converter structure. The reflector reflects light emitted by the wavelength converting structure back towards the wavelength converting structure.

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