Method for producing a light-emitting diode

Patent metadata

Field	Value
Publication number	US-9806237-B2
Application number	US-201013265407-A
Country	US
Kind code	B2
Filing date	Apr 8, 2010
Priority date	May 26, 2009
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A method for producing a light-emitting diode includes providing a light-emitting diode chip including a semiconductor body, and applying a luminescence conversion material to an outer area of the semiconductor body by thermal spraying such that at least part of electromagnetic radiation generated during operation of the light-emitting diode impinges on the luminescence conversion material, or providing a radiation-transmissive carrier, applying a luminescence conversion material to an outer area of the carrier by thermal spraying, and arranging the carrier at a radiation exit area of the light-emitting diode chip such that at least part of electromagnetic radiation generated during operation of the light-emitting diode impinges on the luminescence conversion material.

First claim

The invention claimed is:

1. A method of producing a light-emitting diode comprising:
providing a light-emitting diode chip comprising a semiconductor body,
providing a radiation-transmissive carrier formed from one selected from the group consisting of ceramic material, semiconductor material, glass and plastic,
applying a luminescence conversion material directly to an outer area of the carrier by cold gas spraying, and
arranging the carrier at a radiation exit area of the light-emitting diode chip by a glass such that at least part of electromagnetic radiation generated during operation of the light-emitting diode impinges on the luminescence conversion material, wherein the glass has a low melting point and/or is formed by a sol-gel process,
wherein the luminescence conversion material comprises at least one inorganic phosphor or at least one organic phosphor, the at least one inorganic phosphor is selected from the group consisting of garnets doped with rare earth metals, alkaline earth metal sulfides doped with rare earth metals, thiogallates doped with rare earth metals, aluminates doped with rare earth metals, orthosilicates doped with rare earth metals, chlorosilicates doped with rare earth metals, alkaline earth metal silicon nitrides doped with rare earth metals, oxynitrides doped with rare earth metals and aluminum oxynitrides doped with rare earth metals, and the at least one organic phosphor is selected from the group consisting of perylenes, benzopyrenes, coumarins, rhodamines, azo dye, terylene dye, quaterylene dye, naphthalimide dye, cyanine dye, xanthene dye, oxazine dye, anthracene dye, naphthacene dye, anthraquinone dye and thiazine dye.

2. The method according to claim 1 , wherein particles of the luminescence conversion material have an average diameter of between 1 μm and 50 μm, wherein the luminescence conversion material is suitable for down-conversion of electromagnetic radiation.

3. The method according to claim 1 , wherein after the luminescence conversion material has been applied, part of the luminescence conversion material is removed.

4. The method according to claim 3 , wherein a layer thickness and/or a structuring of a layer composed of the luminescence conversion material is set by removing.

5. The method according to claim 3 , wherein a color locus of a mixed light emitted by the light-emitting diode chip and the luminescence conversion material is set by removing.

6. The method according to claim 1 , wherein the thermal spraying is a nanopowder plasma deposition method and average diameter of deposited particles of the luminescence conversion material is between 1 nm and 100 nm, wherein the luminescence conversion material is suitable for down-conversion of electromagnetic radiation.

Assignees

• Kräuter Gertrud
• Osram Opto Semiconductors Gmbh

Inventors

• Kräuter Gertrud

Classifications

• H01L2933/0041

  Electricity · mapped topic

• H01L33/50 Primary

  Electricity · mapped topic

• C23C24/04

  Impact or kinetic deposition of particles · CPC title

• C23C4/134

  Plasma spraying · CPC title

• H01L33/22

  Electricity · mapped topic