Light emitting device having a substrate with a pattern of protrusions and manufacturing method thereof
US11658264B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Sep 18, 2020 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Nov 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8312
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A light emitting device includes a substrate; a pattern of a plurality of protrusions protruding from the substrate; a first semiconductor layer provided on the substrate; an active layer provided on the first semiconductor layer; and a second semiconductor layer provided on the active layer, in which each of the protrusions includes a first layer formed integrally with the substrate and protruding from an upper surface of the base substrate; and a second layer provided on the first layer and formed of a material different from that of the first layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.