LED having angled sides for increased side light extraction
US6570190B2 · kind B2 · utility
72Cited by
15References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Dec 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/81
Abstract
The invention is a method for designing semiconductor light emitting devices such that the side surfaces (surfaces not parallel to the epitaxial layers) are formed at preferred angles relative to vertical (normal to the plane of the light-emitting active layer) to improve light extraction efficiency and increase total light output efficiency. Device designs are chosen to improve efficiency without resorting to excessive active area-yield loss due to shaping. As such, these designs are suitable for low-cost, high-volume manufacturing of semiconductor light-emitting devices with improved characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.