Light-emitting device having a patterned surface
US10181549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2017 |
| Grant date | Jan 15, 2019 |
| Priority date | — |
| Expiry date | Nov 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/882
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 first polygon shape in a top view of the light-emitting device, wherein 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 joining 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 the plurality of inclined surfaces comprises a second polygon shape in the cross-sectional view of the light-emitting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.