Luminescence Conversion Element, Method for the Manufacture Thereof and Optoelectronic Component Having a Luminescence Conversion Element

• US 20130299862A1
• Filed: 11/08/2011
• Published: 11/14/2013
• Est. Priority Date: 11/09/2010
• Status: Active Grant

• Current Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Original Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Inventors: Liepold, Ute, Schuh, Carsten, Ahlstedt, Mikael
• Granted Patent: US 9,299,878 B2
• Time in Patent Office: Days
• US Class Current: 257/98
• 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

1-15. -15. (canceled)

16. 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;

processing the first main surface and/or the second main surface of the shaped body using a structuring method such that a first processed region and an unprocessed region are formed, wherein the first processed region extends substantially parallel to the first lateral surface; and

singulating to form a plurality of the luminescence conversion elements by cuts that are introduced into the processed main surface of the processed shaped body substantially orthogonally with respect to the first lateral surface.

17. The method according to claim 16, 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.

18. The method according to claim 16, wherein the luminescence conversion substance is formed by a doping of the ceramic material.

19. The method according to claim 18, wherein the ceramic material comprises garnets of the rare earths or the alkaline earth metal elements.

20. The method according to claim 16, further comprising affixing the processed shaped body and/or at least one of the processed partial bodies on an auxiliary carrier.

21. The method according to claim 20, wherein the processed shaped body and/or the at least one of the processed partial bodies are fixed in a recess of the auxiliary carrier.

22. The method according to claim 20, wherein the auxiliary carrier is formed from glass or from a ceramic.

23. The method according to claim 16, wherein a distance between the main surfaces of the shaped body corresponds to a distance between opposite side faces of the luminescence conversion element.

24. The method according to claim 23, wherein the distance between the main surfaces of the shaped body is set by grinding at least one of the first and second main surfaces.

25. The method according to claim 16, wherein the shaped body is obtained by sintering a green body manufactured by an injection molding method, by means of tape casting, uniaxial pressing, cold isostatic pressing, hot pressing or hot isostatic pressing.

26. The method according to claim 16, wherein the luminescence conversion elements each have a thickness of 50 to 200 μ

m.

27. The method according to claim 16, wherein processing the first and/or second main surface is carried out by grinding or sawing.

28. The method according to claim 16, wherein the singulating comprises sawing.

29. A ceramic luminescence conversion element having a cutout, the ceramic luminescence conversion element manufactured with the method according to claim 16.

30. The luminescence conversion element according to claim 29, wherein at least one of the main surfaces of the luminescence conversion element has at least partly a structuring for improved coupling-in and/or coupling-out of radiation.

31. An optoelectronic component comprising a radiation-emitting semiconductor chip and a ceramic luminescence conversion element according to claim 29, wherein the luminescence conversion element converts a primary radiation emitted by the semiconductor chip at least partly into a secondary radiation.

32. 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;

processing the first main surface and/or the second main surface of the shaped body using a structuring method such that a first processed region and an unprocessed region are formed, wherein the first processed region extends substantially parallel to the first lateral surface; and

singulating to form a plurality of the luminescence conversion elements by means of cuts that are introduced into the processed main surface of the processed shaped body substantially orthogonally with respect to the first lateral surface, wherein main surfaces of the singulated luminescence conversion element are formed by the cuts.