Invention Grant
- Patent Title: Light-emitting device having an electrode with depressions
- Patent Title (中): 具有具有凹陷的电极的发光装置
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Application No.: US14252033Application Date: 2014-04-14
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Publication No.: US09583739B2Publication Date: 2017-02-28
- Inventor: Yoshiharu Hirakata , Mika Jikumaru , Yusuke Kubota , Daisuke Kubota , Tetsuji Ishitani , Hideaki Shishido
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2013-084443 20130415
- Main IPC: H01L33/38
- IPC: H01L33/38 ; H01L51/52 ; H01L27/32

Abstract:
In a light-emitting device where reflective electrodes are regularly arranged, occurrence of interference fringes due to reflection of light reflected by the reflective electrode is inhibited. A surface of the reflective electrode of a light-emitting element is provided with a plurality of depressions. The shapes of the plurality of depressions are different from each other and do not have rotational symmetry. Irregularity of the surface shape of the reflective electrode is increased, which inhibits interference of light reflected by the reflective electrode. To form the plurality of depressions in the surface of the reflective electrode, for example, a surface of an insulating layer that is a base of the reflective electrode is made uneven. Reflecting the surface shape of the insulating layer, the reflective electrode has an uneven surface.
Public/Granted literature
- US20140306241A1 Light-Emitting Device Public/Granted day:2014-10-16
Information query
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