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US 11,254,865 B2Granted
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
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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.
Claims19
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;
- sintering the green body to obtain the conversion element, wherein the sintering is performed at a temperature of more than 1720° C.;
- and
- structuring a surface of the green body prior to sintering the green body.
3 more elements
A conversion element comprising:
- a first phase and a second phase,
- wherein the first phase comprises lutetium, aluminum, oxygen and a rare-earth element,
- wherein the second phase comprises Al2O3 single crystals, and
- wherein a surface of the conversion element comprises a plurality of structures,
- wherein each of the structures is laterally completely surrounded by grooves, and
- wherein the Al2O3 single crystals at least partly protrude from the plurality of structures.
3 more elements
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,
- wherein the conversion element comprises 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, and
- wherein a surface of the conversion element comprises a plurality of structures,
- wherein each of the structures is laterally completely surrounded by grooves, and
- wherein the Al2O3 single crystals at least partly protrude from the plurality of structures.
5 more elements
Dependencies are inferred from the claim text.