Luminescent ceramic element for a light emitting device
US7514721B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 29, 2005 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region is attached to a compound substrate including a host which provides mechanical support to the device and a ceramic layer including a luminescent material. In some embodiments the compound substrate includes a crystalline seed layer on which the semiconductor structure is grown. The ceramic layer is disposed between the seed layer and the host. In some embodiments, the compound substrate is attached to the semiconductor structure compound substrate is spaced apart from the semiconductor structure and does not provide mechanical support to the structure. In some embodiments, the ceramic layer has a thickness less than 500 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.