Luminescence conversion element, method for the manufacture thereof and optoelectronic component having a luminescence conversion element

• US 9,299,878 B2
• Filed: 11/08/2011
• Issued: 03/29/2016
• Est. Priority Date: 11/09/2010
• Status: Expired due to Fees

• Current Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Original Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Inventors: Ahlstedt, Mikael, Liepold, Ute, Schuh, Carsten
• Primary Examiner(s): Nguyen, Thinh T
• Application Number:
  US13/881,995
• Publication Number:
  US 20130299862A1
• Time in Patent Office: 1,603 Days
• Field of Search: 438/22, 438/25, 438/26, 438/27, 438/29, 257/98, 257/99, 257/91
• US Class Current: 1/1
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/005 Processes
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture
• CPC Class Codes: Y10T 428/24273 including aperture

Abstract

A method for manufacturing a ceramic luminescence conversion element includes providing a shaped body having a first main surface, a second main surface and a first lateral surface. The shaped body includes a ceramic material and a luminescence conversion substance. The first main surface and/or the second main surface of the shaped body is/are machined using a patterning method, so that at least one first machined area and at least one unmachined area are formed. The first machined area extends essentially parallel to the first lateral surface. Singularization is performed to produce a plurality of luminescence conversion elements by means of cuts that are made in the machined main surface of the machined shaped body essentially at right angles to the first lateral surface.

Claims

1. A method for manufacturing a luminescence conversion element comprising a ceramic material, the method comprising:

providing a shaped body having a first main surface, a second main surface and a first lateral surface, wherein the shaped body comprises a ceramic material and a luminescence conversion substance;

forming a fold by processing the first main surface and/or the second main surface of the shaped body applying a grinding or sawing method thereby forming a process shaped body comprising a first processed region, wherein the first processed region extends substantially parallel to the first lateral surface; and

forming a plurality of the luminescence conversion elements by singulating the process shaped body substantially orthogonally with respect to the first lateral surface.

2. The method according to claim 1, further comprising processing the first main surface and the second main surface to form two partial bodies that comprise a second processed region running substantially parallel to the first lateral surface.

3. The method according to claim 1, wherein the luminescence conversion substance is formed by a doping of the ceramic material.

4. The method according to claim 3, wherein the ceramic material comprises garnets of rare earths or alkaline earth metal elements.

5. The method according to claim 2, further comprising affixing the process shaped body and/or at least one of the partial bodies on an auxiliary carrier.

6. The method according to claim 5, wherein the auxiliary carrier is formed from glass or from ceramic.

7. The method according to claim 1, wherein a distance between the first and second main surfaces of the shaped body corresponds to a distance between opposite side faces of the luminescence conversion element.

8. The method according to claim 7, wherein the distance between the first and second main surfaces of the shaped body is set by grinding at least one of the first and second main surfaces.

9. The method according to claim 1, wherein the shaped body is obtained by sintering a green body manufactured by an injection molding method, by tape casting, by uniaxial pressing, by cold isostatic pressing, by hot pressing or by hot isostatic pressing.

10. The method according to claim 1, wherein each of the luminescence conversion elements has a thickness of 50 to 200 μ

m.

11. The method according to claim 1, wherein singulating comprises sawing.

12. A ceramic luminescence conversion element having a cutout, the ceramic luminescence conversion element manufactured with the method according to claim 1.

13. The ceramic luminescence conversion element according to claim 12, wherein at least a main surfaces a main surface of the luminescence conversion element has at least partly a structuring for coupling-in and/or coupling-out of radiation.

14. An optoelectronic component comprising a radiation-emitting semiconductor chip and the ceramic luminescence conversion element according to claim 12, wherein the luminescence conversion element converts a primary radiation emitted by the semiconductor chip at least partly into a secondary radiation.

16. The method according to claim 1, wherein the ceramic material takes a proportion by weight of more than 75% of the luminescence conversion element.

15. A method for manufacturing a luminescence conversion element comprising a ceramic material, the method comprising:

providing a shaped body having a first main surface, a second main surface and a first lateral surface, wherein the shaped body comprises a ceramic material and a luminescence conversion substance;

forming a fold by processing the first main surface and/or the second main surface of the shaped body applying a grinding or sawing method thereby forming a first processed region, wherein the first processed region extends substantially parallel to the first lateral surface; and

forming a plurality of the luminescence conversion elements by cutting the process shaped body substantially orthogonally with respect to the first lateral surface, wherein main surfaces of the singulated luminescence conversion element are formed by the cutting.