专利名称：Light-emitting device having a patterned
substrate and the method thereof
发明人：Ta-Cheng Hsu,Ya-Lan Yang,Ying-Yong
Su,Ching-Shian Yeh,Chao-Shun Huang,Ya-JuLee
申请号：US14986791申请日：20160104公开号：US09780259B2公开日：20171003
专利附图：
摘要：A light-emitting device comprises a textured substrate comprising a plurality of
textured structures, wherein the textured structures and the textured substrate are bothcomposed of sapphire; and a light-emitting stack overlaying the textured substrate,comprising a first conductivity type semiconductor layer, an active layer, and a secondconductivity type semiconductor layer, wherein each of the plurality of texturedstructures comprises a top portion having a first top-view shape, and a bottom portionparallel to the top portion and having a second top-view shape, wherein the first top-viewshape comprises a circle or an ellipse, the first top-view shape comprises a first peripheryand the second top-view shape comprises a second periphery, the first periphery isenclosed by the second periphery, and various distances are between each of the firstperiphery and the second periphery.
申请人：EPISTAR CORPORATION
地址：Hsinchu TW
国籍：TW
代理机构：Ditthavong & Steiner, P.C.
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