Light-emitting device and manufacturing method thereof
US9698303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2015 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Jul 10, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/814
Abstract
A light-emitting device is disclosed. The light-emitting diode device includes a substrate, comprising an upper surface, a lower surface and a plurality of side surfaces; and a semiconductor stack formed on the upper surface of the substrate; wherein the plurality of side surfaces comprises: a first region, adjacent to the upper surface and having a first surface roughness; a second region, comprising one or a plurality of textured areas substantially parallel to the upper surface and/or the lower surface in a side view, wherein the textured area is composed of a plurality of textured stripes and has a second surface roughness; and a third region, having a third surface roughness and being between the first region and the second region, and/or between the plurality of textured areas; wherein the first surface roughness is smaller than the second surface roughness, and the third surface roughness is smaller than the first surface roughness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.