Media type: Electronic Conference Proceeding Title: The effects of sapphire substrates processes to the LED efficiency Contributor: Yang, Hua; Chen, Yu; Wang, Libin; Yi, Xiaoyan; Fan, Jingmei; Liu, Zhiqiang; Yang, Fuhua; Wang, Liangchen; Wang, Guohong; Zeng, Yiping; Li, Jinmin Published: SPIE, 2007 Published in: SPIE Proceedings (2007) Extent: Language: Not determined DOI: 10.1117/12.759280 ISSN: 0277-786X Origination: Footnote: