Process of Manufacturing a Conversion Element, Conversion Element and Light Emitting Device Comprising the Conversion Element
AssigneeOSRAM Opto Semiconductors GmbH
InventorsDarshan Kundaliya, Jeffery J. Serre, James Avallon, Kathleen A. Lawson
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a conversion element is disclosed. A precursor material is selected from one or more of lutetium, aluminum and a rare-earth element. The precursor material is mixed with a binder and a solvent to obtain a slurry. A green body is formed from the slurry and the green body is sintered to obtain the conversion element. The sintering is performed at a temperature of more than 1720° C.
Claims18
A method of manufacturing a conversion element, the method comprising:
- providing a precursor material, the precursor material comprising a material selected from the group consisting of lutetium, aluminum and a rare-earth element,
- mixing the precursor material with a binder and a solvent to obtain a slurry;
- forming a green body from the slurry;
- and
- sintering the green body to obtain the conversion element, wherein the sintering is performed at a temperature of more than 1720° C.
A conversion element comprising a first phase and a second phase, wherein the first phase comprises lutetium, aluminum, oxygen and a rare-earth element and the second phase comprises Al2O3 single crystals.
The conversion element according to claim ii, wherein the conversion element has a surface structure and the Al2O3 single crystals at least partly protrude from the surface structure.
A light emitting device comprising:
- a primary light source configured to emit primary radiation during operation of the light emitting device;
- and
- a conversion element arranged in a beam path of the primary light source and configured to at least partly convert the primary radiation into secondary radiation, the conversion element comprising a first phase and a second phase, wherein the first phase comprises lutetium, aluminum, oxygen and a rare-earth element and the second phase comprises Al2O3 single crystals.
Dependencies are inferred from the claim text.