Semiconductor device for emitting light and method for fabricating the same

• US 20070001188A1
• Filed: 10/26/2004
• Published: 01/04/2007
• Est. Priority Date: 09/10/2004
• Status: Abandoned Application

• Current Assignee: Luxpia Co., Ltd.
• Original Assignee: Luxpia Co., Ltd.
• Inventors: Lee, Kyeong-Cheol
• Application Number:
  US10/574,743
• Publication Number:
  US 20070001188A1
• Time in Patent Office: Days
• US Class Current: 257/99
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/49113 the connectors connecting different bonding areas on the semiconductor or solid-state body to a common bonding area outside the body, e.g. converging wires
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• 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 33/50 Wavelength conversion elements

Abstract

A semiconductor light emitting device includes a package (5) having two or more terminals, two or more semiconductor devices (1,2) mounted in the package to emit lights each having a predetermined wavelength, and a molding unit (3) mixed with a phosphor. The phosphor is excited by the lights emitted from the semiconductor devices to emit light having a wavelength different from those of the lights emitted from the semiconductor devices.

Claims

1. A semiconductor light emitting device comprising:

a package having two or more terminals;

two or more semiconductor devices mounted in the package to emit lights, each having a predetermined wavelength; and

a molding unit mixed with a phosphor that is excited by the lights emitted from the semiconductor devices to emit light having a wavelength different from those of the lights emitted from the semiconductor devices.

2. The semiconductor light emitting device of claim 1, wherein the semiconductor devices include two or more semiconductor device groups emitting lights having a wavelength in a different visible ray range from each.

3. The semiconductor light emitting device of any one of claims 1 and 2, wherein the semiconductor devices includes one or more devices emitting blue light and one or more devices emitting red light.

4. The semiconductor light emitting device of claim 3, wherein the semiconductor device emitting blue light has a peak wavelength of about 430-480 nm.

5. The semiconductor light emitting device of claim 3, wherein the semiconductor device emitting the red light has a peak wavelength of about 610-700 nm.

6. The semiconductor light emitting device of claim 1, wherein at least one of the semiconductor devices emits light in an ultraviolet ray range.

7. The semiconductor light emitting device of claim 1, wherein the molding unit is formed of a mixture of phosphor and a molding material, the phosphor being designed to emit green light when it is excited by the light emitted from the semiconductor device.

8. The semiconductor light emitting device of claim 7, wherein the phosphor has an excitation wavelength of about 200 -550 nm and an emitting wavelength of about 500-570 nm.

9. The semiconductor light emitting device of claim 1, wherein the molding unit is formed of a mixture of phosphor and a molding material, the phosphor being designed to emit red light when it is excited by the light emitted from the semiconductor device.

10. The semiconductor light emitting device of claim 1, wherein at least one of the semiconductor devices emits light having a similar color to that of the light emitted from the phosphor.

11. The semiconductor light emitting device of claim 1, wherein the semiconductor devices include one or more red light emitting devices and one or more blue light emitting devices, and the phosphor is designed to emit green light when it is excited by the light emitted from the semiconductor devices, thus the semiconductor light emitting device radiates white light.

12. The semiconductor light emitting device of claim 11, further comprising one or more green light emitting devices.

13. The semiconductor light emitting device of claim 1, wherein the semiconductor devices include one or more blue light emitting devices and one or more green light emitting devices, and the phosphor is designed to emit red light when it is excited by the light emitted from the semiconductor devices, thus the semiconductor light emitting device radiates white light.

14. The semiconductor light emitting device of claim 13, further comprising one or more red light emitting devices.

15. The semiconductor light emitting device of claim 1, wherein the semiconductor device include an LED.

16. The semiconductor light emitting device of claim 1, wherein the semiconductor devices are connected to each other in series, in parallel, or in series-parallel.

17. A method for making a semiconductor light emitting device, comprising the steps of:

mounting two or more semiconductor devices on a package having two or more terminals;

electrically connecting the semiconductor devices to each other using a conductive wire; and

forming a molding unit by molding a mixture of a phosphor and a transparent molding material, the phosphor being excited by the lights emitted from the semiconductor devices to emit light having a wavelength different from those of the lights emitted from the semiconductor devices.

18. The method of claim 17, wherein the transparent molding material is selected from the group consisting of epoxy resin, urea resin, and silicone.

19. The method of claim 17, wherein the semiconductor devices comprise a blue chip having a peak wavelength of about 430-480 nm and a red chip having a peak wavelength of about 610-700 nm, and the phosphor has an excitation wavelength of about 200-550 nm and an emitting wavelength of about 500-570 nm.