Improvement of surface light extraction from flip‐chip GaN‐based LED by embossing of thermosetting polymers

Autor:	Tao Dai, Hang Ji, ZhiMin Wang, Zhizhong Chen, Bei Zhang, Xiangning Kang, Z. Z. Gan, K. Xu, Kui Bao, Yong Chen
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Materials science business.industry Thermosetting polymer Nanotechnology Polymer Condensed Matter Physics chemistry Sapphire Polymer encapsulation Optoelectronics business Embossing Flip chip
Zdroj:	physica status solidi c. 4:33-36
ISSN:	1610-1642 1862-6351
DOI:	10.1002/pssc.200673519
Popis:	In this report, a further improvement of surface light extraction from flip-chip GaN-based LED was obtained by the micro patterning of encapsulation on the sapphire. The two dimensional taper arrays with period from 6 to 10 micron were successfully realized on polymer encapsulation by a simple and low cost technique so called embossing of thermosetting polymers. As a preliminary demonstration, at least 1.74 enhancement of the surface output intensity was achieved in the 1 mm × 1 mm GaN-based LED device under the injection current of 350 mA. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze:	OpenAIRE
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