Light emitting devices for light conversion and methods and semiconductor chips for fabricating the same
US6885033B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Mar 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/819
Abstract
Broad spectrum light emitting devices and methods and semiconductor chips for fabricating such devices include a light emitting element, such as a diode or laser, which emits light in a predefined range of frequencies. The light emitting element includes a shaped substrate suitable for light extraction through the substrate and a cavity in the substrate proximate the light emitting element. For example, a trench adjacent at least a portion of the periphery of the light emitting element may be provided. The cavity/trench is configured to contain light conversion material such that light extracted from sidewalls of the cavity/trench passes through the light conversion material contained in the cavity/trench. Methods of fabricating such devices and/or chips are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.