Title:
LED ELEMENT AND MANUFACTURING METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2014/126016
Kind Code:
A1
Abstract:
Provided are an LED element and a method for manufacturing the same that can further improve light extraction efficiency.
In the LED element, the surface of a sapphire substrate forms a verticalized moth eye surface having a plurality of recessed parts and protruding parts with periods larger than twice the optical wavelength of light emitted by a light emitting layer and smaller than the coherent length. Because of reflection and transmission at the verticalized moth eye surface, light for which the intensity distribution has been adjusted so as to be biased toward the direction vertical to the interface of the sapphire substrate and a semiconductor layer is discharged to the outside of the element in a state in which Fresnel reflection is suppressed at the transmission moth eye surface.
Inventors:
SUZUKI ATSUSHI (JP)
NANIWAE KOICHI (JP)
EKMAN JOHAN (JP)
NANIWAE KOICHI (JP)
EKMAN JOHAN (JP)
Application Number:
PCT/JP2014/052894
Publication Date:
August 21, 2014
Filing Date:
February 07, 2014
Export Citation:
Assignee:
EL SEED CORP (JP)
International Classes:
H01L33/22
Domestic Patent References:
| WO2011027679A1 | 2011-03-10 | |||
| WO2006093018A1 | 2006-09-08 |
Foreign References:
| JP2009164423A | 2009-07-23 | |||
| JP2011060916A | 2011-03-24 | |||
| JP2010074090A | 2010-04-02 | |||
| JP2000221698A | 2000-08-11 | |||
| JP5142236B1 | 2013-02-13 |
Attorney, Agent or Firm:
SHIGEIZUMI, Tatsushi (JP)
重泉 Tatsushi (JP)
重泉 Tatsushi (JP)
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