Light emitter components and methods having improved performance

• US 8,916,896 B2
• Filed: 02/22/2013
• Issued: 12/23/2014
• Est. Priority Date: 02/22/2013
• Status: Active Grant

• Current Assignee: Creeled Incorporated
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Andrews, Peter Scott, Adames, Luis
• Primary Examiner(s): HA, NATHAN W
• Application Number:
  US13/774,248
• Publication Number:
  US 20140239325A1
• Time in Patent Office: 669 Days
• Field of Search: 257 98- 99
• US Class Current: 257/98
• CPC Class Codes: H01L 2224/83 using a layer connector
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

Light emitter components and methods having improved performance and related methods are disclosed. In one embodiment, a light emitter component can include a submount and at least one light emitting diode (LED) chip disposed over the submount. The submount can contact at least two different sides of the at least one LED chip. In one aspect, a submount can include surface portions adapted to receive portions one or more LED chips. In one aspect, one or more LED chips can be embedded within the submount.

Claims

1. A light emitter component comprising:

a submount comprising ceramic; and

at least one light emitting diode (LED) chip disposed within a portion of the submount;

wherein the submount contacts at least two different light emitting sides of the at least one LED chip such that light emitted by the at least two different light emitting sides is emitted into the submount and reflected back out thereon.

2. The component according to claim 1, wherein the at least one LED chip is embedded within a portion of the submount.

3. The component according to claim 1, wherein the submount comprises one or more surface portions adapted to receive a portion of the at least one LED chip.

4. The component according to claim 3, wherein the one or more surface portions comprises a recess.

5. The component according to claim 3, wherein the one or more surface portions comprises a groove.

6. The component according to claim 1, wherein the ceramic based material comprises alumina.

7. The component according to claim 1, wherein the submount comprises a first layer of material and a second layer of material.

8. The component according to claim 7, wherein the first layer of material comprises a ceramic plate of alumina, and wherein the second layer of material comprises light scattering particles disposed in a matrix material.

9. The component according to claim 8, wherein the light scattering particles comprise one or more particles of Al2O3, TiO2, BaSO4, and/or AlN.

10. The component according to claim 8, wherein the light scattering particles are loaded between approximately 3 weight percent (wt. %) and approximately 50 wt. % within the matrix material.

11. The component according to claim 10, wherein the light scattering particles are uniformly loaded within portions of submount.

12. The component according to claim 10, wherein the light scattering particles are variably loaded within portions submount.

13. The component according to claim 1, wherein a reflective material is provided within a portion of submount.

14. The component according to claim 13, wherein the reflective material is provided below a portion of the LED chip.

15. The component according to claim 13, wherein the reflective material is applied to a bottom surface of submount.

16. The component according to claim 13, wherein the reflective material comprises silver.

17. A light emitter component comprising:

a submount comprising ceramic; and

at least one light emitting diode (LED) chip having multiple light emitting surfaces embedded within a portion of the submount;

wherein the submount is adapted to receive light emitted by the multiple light emitting surfaces and reflect the light back out thereon via one or more light reflecting areas disposed within the submount.

18. The component according to claim 17, wherein the submount contacts the LED chip in at least two points.

19. The component according to claim 17, wherein the submount contacts the LED chip in at least three points.

20. The component according to claim 17, wherein the submount contacts the LED chip in at least four points.

21. The component according to claim 17, wherein the submount contacts the LED chip in at least five points.

22. The component according to claim 17, wherein the submount contacts the LED chip in at least six points.

23. The component according to claim 17, wherein the ceramic based material comprises alumina.

24. The component according to claim 17, wherein the submount comprises a first layer of material and a second layer of material.

25. The component according to claim 24, wherein the first layer of material comprises a ceramic plate of alumina, and wherein the second layer of material comprises light scattering particles disposed in a matrix material.

26. The component according to claim 25, wherein the light scattering particles comprise one or more particles of Al2O3, TiO2, BaSO4, and/or AlN.

27. The component according to claim 25, wherein the light scattering particles comprise a variable packing density within portions submount such that at least a first area of the submount is more densely loaded with light scattering particles than a second area.

28. The component according to claim 17, wherein a reflective material is provided within a portion of submount.

29. The component according to claim 28, wherein the reflective material is applied to a bottom surface of submount.

30. The component according to claim 28, wherein the reflective material comprises silver.

31. A submount comprising:

a body comprising ceramic; and

a surface feature disposed in the body, wherein the surface feature is adapted to receive a portion of a light emitting diode (LED) chip and contact multiple light emitting surfaces of the LED chip;

wherein light emitted by the light emitting surfaces are emitted from the body by light reflecting areas internally disposed within the body.

32. The submount according to claim 31, wherein the surface feature comprises a recess.

33. The submount according to claim 31, wherein the surface feature comprises a groove.

34. The submount according to claim 33, wherein the groove comprises a V-shaped cross section.

35. The submount according to claim 31, wherein at least a portion of the submount comprises alumina.

36. The submount according to claim 31, wherein the submount comprises a first layer of material and a second layer of material.

37. The submount according to claim 36, wherein the first layer of material comprises a ceramic plate of alumina, and wherein the second layer of material comprises light scattering particles disposed in a matrix material.

38. The submount according to claim 37, wherein the light scattering particles comprise one or more particles of Al2O3, TiO2, BaSO4, and/or AlN.

39. The submount according to claim 31, wherein the submount comprises optical conversion materials dispersed within the ceramic based body of material.

40. The submount according to claim 31, further comprising a reflective material buried within a portion of the submount.

41. The submount according to claim 40, wherein the reflective material is provided below a portion of the LED chip.

42. The component according to claim 40, wherein the reflective material is applied to a bottom surface of the submount.

43. The component according to claim 40, wherein the reflective material comprises silver.