Encapsulation for phosphor-converted white light emitting diode
US-9287469-B2 · Mar 15, 2016 · US
Assembly that emits electromagnetic radiation and method of producing an assembly that emits electromagnetic radiation
US9761769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9761769-B2 |
| Application number | US-201414782092-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2014 |
| Priority date | Apr 5, 2013 |
| Publication date | Sep 12, 2017 |
| Grant date | Sep 12, 2017 |
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Abstract
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An electromagnetic radiation emitting assembly includes a carrier, an electromagnetic radiation emitting component arranged above the carrier, and a potting material at least partly surrounding the electromagnetic radiation emitting component and into which are embedded phosphor that converts the electromagnetic radiation and heat-conducting particles that conduct heat arising during operation of the electromagnetic radiation emitting assembly, wherein a phosphor concentration in the potting material near the electromagnetic radiation emitting component is greater than a particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component, and a particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component is greater than in the potting material remote from the electromagnetic radiation emitting component.
First claim
Opening claim text (preview).
The invention claimed is: 1. An electromagnetic radiation emitting assembly comprising: a carrier, an electromagnetic radiation emitting component arranged above the carrier, and a potting material at least partly surrounding the electromagnetic radiation emitting component and into which are embedded phosphor that converts the electromagnetic radiation and heat-conducting particles that conduct heat arising during operation of the electromagnetic radiation emitting assembly, wherein a phosphor concentration in the potting material near the electromagnetic radiation emitting component is greater than a particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component, and a particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component is greater than in the potting material remote from the electromagnetic radiation emitting component. 2. The electromagnetic radiation emitting assembly as claimed in claim 1 , wherein a phosphor concentration of the phosphor in the potting material near the electromagnetic radiation emitting component is greater than in the potting material remote from the electromagnetic radiation emitting component. 3. The electromagnetic radiation emitting assembly as claimed in claim 1 , wherein the heat-conducting particles have a thermal conductivity of 1 W/mK to 9 W/mK. 4. The electromagnetic radiation emitting assembly as claimed in claim 1 , wherein the heat-conducting particles comprise SiO 2 and/or cristobalite. 5. An electromagnetic radiation emitting assembly comprising: a carrier, an electromagnetic radiation emitting component arranged above the carrier, and a potting material at least partly surrounding the electromagnetic radiation emitting component and into which are embedded phosphor that converts the electromagnetic radiation and heat-conducting particles that conduct heat arising during operation of the electromagnetic radiation emitting assembly, wherein a phosphor concentration in the potting material near the electromagnetic radiation emitting component is greater than a particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component, and the phosphor concentration in the potting material remote from the electromagnetic radiation emitting component is greater than the particle concentration of the heat-conducting particles in the potting material remote from the electromagnetic radiation emitting component. 6. The electromagnetic radiation emitting assembly as claimed in claim 5 , wherein a phosphor concentration of the phosphor in the potting material near the electromagnetic radiation emitting component is greater than in the potting material remote from the electromagnetic radiation emitting component. 7. The electromagnetic radiation emitting assembly as claimed in claim 5 , wherein the heat-conducting particles have a thermal conductivity of 1 W/mK to 9 W/mK. 8. The electromagnetic radiation emitting assembly as claimed in claim 5 , wherein the heat-conducting particles comprise SiO 2 and/or cristobalite. 9. A method of producing an electromagnetic radiation emitting assembly, comprising: arranging an electromagnetic radiation emitting component above a carrier, and arranging a potting material above the electromagnetic radiation emitting component such that the potting material at least partly surrounds the electromagnetic radiation emitting component, wherein phosphor that converts the electromagnetic radiation and heat-conducting particles that conduct heat arising during operation of the electromagnetic radiation emitting assembly are embedded in the potting material, the potting material, the phosphor particles and the heat-conducting particles are formed, and process parameters are predefined such that the phosphor particles and the heat-conducting particles sediment in the potting material and the phosphor concentration in the potting material near the electromagnetic radiation emitting component becomes greater than the particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component and a particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component becomes greater than in the potting material remote from the electromagnetic radiation emitting component. 10. The method as claimed in claim 9 , wherein the potting material and the phosphor particles are formed, and process parameters are predefined such that the phosphors sediment in the potting material such that a phosphor concentration of the phosphor in the potting material near the electromagnetic radiation emitting component becomes greater than in the potting material remote from the electromagnetic radiation emitting component. 11. The method as claimed in claim 9 , wherein particles having a thermal conductivity of 1 W/mK to 9 W/mK are used as heat-conducting particles. 12. A method of producing an electromagnetic radiation emitting assembly, comprising: arranging an electromagnetic radiation emitting component above a carrier, and arranging a potting material above the electromagnetic radiation emitting component such that the potting material at least partly surrounds the electromagnetic radiation emitting component, wherein phosphor that converts the electromagnetic radiation and heat-conducting particles that conduct heat arising during operation of the electromagnetic radiation emitting assembly are embedded in the potting material, the potting material, the phosphor particles and the heat-conducting particles are formed, and process parameters are predefined such that the phosphor particles and the heat-conducting particles sediment in the potting material and the phosphor concentration in the potting material near the electromagnetic radiation emitting component becomes greater than the particle concentration of the heat-conducting particles in the potting material near the electromagnetic radiation emitting component and the phosphor concentration in the potting material remote from the electromagnetic radiation emitting component becomes greater than the particle concentration of the heat-conducting particles in the potting material remote from the electromagnetic radiation emitting component. 13. The method as claimed in claim 12 , wherein the potting material and the phosphor particles are formed, and process parameters are predefined such that the phosphors sediment in the potting material such that a phosphor concentration of the phosphor in the potting material near the electromagnetic radiation emitting component becomes greater than in the potting material remote from the electromagnetic radiation emitting component. 14. The method as claimed in claim 12 , wherein particles having a thermal conductivity of 1 W/mK to 9 W/mK are used as heat-conducting particles.
Assignees
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Classifications
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H01L33/508Primary
Electricity · mapped topic
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- What does patent US9761769B2 cover?
- An electromagnetic radiation emitting assembly includes a carrier, an electromagnetic radiation emitting component arranged above the carrier, and a potting material at least partly surrounding the electromagnetic radiation emitting component and into which are embedded phosphor that converts the electromagnetic radiation and heat-conducting particles that conduct heat arising during operation …
- Who is the assignee on this patent?
- Osram Opto Semiconductors Gmbh
- What technology area does this patent fall under?
- Primary CPC classification H01L33/508. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 12 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).