Light-emitting device having a patterned surface

    公开(公告)号:US09847451B2

    公开(公告)日:2017-12-19

    申请号:US15428395

    申请日:2017-02-09

    Abstract: A light-emitting device comprises a substrate having a top surface and a plurality of patterned units protruding from the top surface; and a light-emitting stack formed on the substrate and having an active layer with a first surface substantially parallel to the top surface, wherein one of the plurality of patterned units comprises a plurality of connecting sides constituting a polygon shape in a top view of the light-emitting device, the one of the plurality of patterned units comprises a vertex and a plurality of inclined surfaces respectively extending from the plurality of connecting sides, the plurality of inclined surfaces commonly join at the vertex in a cross-sectional view of the light-emitting device, the vertex being between the top surface of the substrate and the first surface of the active layer, and six of the plurality of patterned units forms a hexagon in the top view of the light-emitting device.

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