High power radiation emitter device and heat dissipating package for electronic components

• US 7,075,112 B2
• Filed: 01/31/2002
• Issued: 07/11/2006
• Est. Priority Date: 01/31/2001
• Status: Expired due to Fees

• Current Assignee: Gentex Corporation
• Original Assignee: Gentex Corporation
• Inventors: Roberts, John K., Reese, Spencer D.
• Primary Examiner(s): PHAM, HOAI V
• Application Number:
  US10/470,879
• Publication Number:
  US 20040113549A1
• Time in Patent Office: 1,622 Days
• Field of Search: 257/13, 257/21, 257 79- 82, 257 98-100
• US Class Current: 257/79
• CPC Class Codes: G02B 3/0056 arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 23/42 Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
• 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 33/648 the elements comprising fluids, e.g. heat-pipes
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity

Abstract

The electronic component package (10) of the present invention includes a sealed chamber; a liquid or gel (20) contained in the sealed chamber; at least one electronic component (12) disposed in the sealed chamber in physical and thermal contact with the liquid or gel (20); and at least one electrical conductor electrically coupled to the electronic component and extending out of the sealed chamber. The electronic component(s) (12) may include any one or combination of a radiation emitter, a thermal or optical sensor, a resistor, and a microprocessor or other semiconductor component.

Claims

1. An optical radiation emitting device comprising:

a sealed chamber;

a fluid intermediary material contained in said sealed chamber and having a refractive index greater than 1.0;

an inorganic electroluminescent semiconductor radiation emitter that emits optical radiation in response to an electrical signal, said inorganic electroluminescent semiconductor radiation emitter disposed in said sealed chamber in physical and thermal contact with said fluid intermediary material; and

first and second electrical conductors electrically coupled to said inorganic electroluminescent semiconductor radiation emitter for energizing said inorganic electroluminescent semiconductor radiation emitter.

2. The optical radiation emitting device of claim 1, wherein said fluid intermediary material contained has a refractive index greater than about 1.3.

3. The optical radiation emitting device of claim 1, wherein said fluid intermediary material contained has a refractive index greater than about 1.4.

4. The optical radiation emitting device of claim 1, wherein said fluid intermediary medium is a liquid or gel.

5. The optical radiation emitting device of claim 1, wherein said device exhibits a power density of at least about 2 Watts/in².

6. The optical radiation emitting device of claim 5, wherein said device exhibits a power density of at least about 5 Watts/in².

7. The optical radiation emitting device of claim 6, wherein said device exhibits a power density of at least about 10 Watts/in².

8. The optical radiation emitting device of claim 1, wherein said inorganic electroluminescent semiconductor radiation emitter is an LED chip.

9. The optical radiation emitting device of claim 8, wherein said LED chip comprises one of the materials included in the group consisting of AlInGaP, InGaAlP, GaN, InGaN, AlInGaN, AlGaAs, GaP, GaAsP, SiC and ZnSe.

10. The optical radiation emitting device of claim 8 and further comprising a second LED chip.

11. The optical radiation emitting device of claim 10, wherein said LED chips emit light of complementary colors that combine to form white light.

12. The optical radiation emitting device of claim 1 and further comprising a photoluminescent emitter.

13. The optical radiation emitting device of claim 12, wherein said inorganic electroluminescent semiconductor radiation emitter and said photoluminescent emitter generate radiation with distinctly different peak wavelengths from one another.

14. The optical radiation emitting device of claim 13, wherein the combined radiation generated by said inorganic electroluminescent semiconductor radiation emitter and said photoluminescent emitter form white light.

15. The optical radiation emitting device of claim 12, wherein said photoluminescent emitter comprises a material selected from the group consisting of fluorescent phosphor, fluorescent dye, and fluorescent crystal layer.

16. The optical radiation emitting device of claim 12, wherein said photoluminescent emitter is in contact with said inorganic electroluminescent semiconductor radiation emitter.

17. The optical radiation emitting device of claim 12, wherein said photoluminescent emitter is in contact with a surface of said chamber.

18. The optical radiation emitting device of claim 1, wherein said inorganic electroluminescent semiconductor radiation emitter comprises at least one electrode attached by means selected from the group consisting of:

conductive epoxy die attach, eutectic die attach, solder, solder bump, and wire bond.

19. The optical radiation emitting device of claim 1, wherein said inorganic electroluminescent semiconductor radiation emitter emits radiation with a peak wavelength in the visible portion of the optical spectrum.

20. The optical radiation emitting device of claim 1, wherein said inorganic electroluminescent semiconductor radiation emitter emits radiation with a peak wavelength in the UV portion of the optical spectrum.

21. The optical radiation emitting device of claim 1, wherein said inorganic electroluminescent semiconductor radiation emitter emits radiation with a peak wavelength in the IR portion of the optical spectrum.

22. An optical radiation emitting device comprising:

a metallic substrate;

a transparent cover attached to said metallic substrate to form a sealed chamber, said transparent cover comprising an integral lens;

a fluid intermediary material contained in said sealed chamber and having a refractive index greater than 1.0, said fluid intermediary material being substantially electrically nonconductive; and

an inorganic semiconductor radiation emitter mounted on a surface of said metallic substrate within said sealed chamber in physical and thermal contact with said fluid intermediary material, said inorganic semiconductor radiation emitter emitting optical radiation through said lens in response to an electrical signal.

23. The optical radiation emitting device of claim 22 and further comprising a heat sink in thermal contact with said metallic substrate.

24. The optical radiation emitting device of claim 22, wherein said metallic substrate comprises a reflective cup formed therein in which said inorganic semiconductor radiation emitter is mounted.

25. The optical radiation emitting device of claim 22, wherein said inorganic semiconductor radiation emitter is an LED chip.

26. The optical radiation emitting device of claim 22 and further comprising at least one additional inorganic semiconductor radiation emitter mounted on a surface of said metallic substrate within said sealed chamber in physical and thermal contact with said fluid intermediary material.

27. The optical radiation emitting device of claim 22 and further comprising first and second electrodes electrically coupled to said inorganic semiconductor radiation emitter for supplying an electrical signal thereto.