LIGHT-EMITTING DEVICE AND METHOD FOR MANUFACTURING LIGHT-EMITTING DEVICE

• US 20100013373A1
• Filed: 07/14/2009
• Published: 01/21/2010
• Est. Priority Date: 07/18/2008
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Aoki, Nobuaki, Hata, Toshio
• Granted Patent: US 8,427,042 B2
• Time in Patent Office: Days
• US Class Current: 313/502
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48465 the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
• 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 2924/00014 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 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H05B 33/145 Arrangements of the electroluminescent material

Abstract

A light-emitting device has a structure in which a light-emitting element is placed on a wiring pattern, with the wiring pattern and an upper portion of the light-emitting element being connected with each other by a bonding wire, and has a feature in that a phosphor kneaded matter, obtained from a phosphor kneaded matter packaging container, is sealed on the wiring pattern and the light-emitting element by a sealing resin. With this structure, it becomes possible to emit white light with high efficiency and consequently to obtain white light that is remarkably superior in color reproducibility (NTSC ratio).

Claims

1. A light-emitting device comprising:

a light-emitting element placed on a wiring pattern, with said wiring pattern and an upper portion of said light-emitting element being connected to each other by a bonding wire; and

a phosphor kneaded matter obtained from a phosphor kneaded matter packaging container,

wherein said phosphor kneaded matter is sealed on said wiring pattern and said light-emitting element by a sealing resin.

2. The light-emitting device according to claim 1, wherein said phosphor kneaded matter contains a transparent resin and a red phosphor, and is sealed together with a green phosphor by said sealing resin.

3. The light-emitting device according to claim 1, wherein said phosphor kneaded matter contains a transparent resin, a red phosphor and a green phosphor.

4. The light-emitting device according to claim 1, wherein said phosphor kneaded matter contains a red phosphor coated with a transparent resin and a coating resin, and is sealed together with a green phosphor by said sealing resin.

5. The light-emitting device according to claim 1, wherein said phosphor kneaded matter contains a primer and a red phosphor, and is sealed together with a green phosphor by said sealing resin.

6. The light-emitting device according to claim 1, wherein said phosphor kneaded matter contains a red phosphor coated with a transparent resin and a primer, and is sealed together with a green phosphor by said sealing resin.

7. The light-emitting device according to claim 1, wherein said phosphor kneaded matter contains a transparent resin, a red phosphor and a green phosphor coated with a primer.

8. The light-emitting device according to claim 2, wherein said transparent resin contains at least one material selected from the group consisting of a dispersant, a reflective agent and a scattering agent.

9. The light-emitting device according to claim 1, wherein uppermost layers of a pad electrode, a bonding wire and a wiring pattern on a light-emitting element that are made in contact with the sealing resin that seals said phosphor kneaded matter are made of a platinum layer or a gold layer.

10. The light-emitting device according to claim 2, wherein said red phosphor is a tetravalent manganese-activated tetravalent fluoride metal salt phosphor.

11. The light-emitting device according to claim 10, wherein said phosphor kneaded matter further contains a calcium compound.

12. The light-emitting device according to claim 1, wherein said phosphor kneaded matter packaging container and said phosphor kneaded matter are made in contact with each other, with a contact face of said kneaded matter packaging container being made from a polymer material.

13. The light-emitting device according to claim 1, wherein said phosphor kneaded matter packaging container is a tube-shaped tube packaging container or a tube-shaped container.

14. The light-emitting device according to claim 1, wherein said phosphor kneaded matter packaging container further includes a calcium compound therein.

15. The light-emitting device according to claim 11, wherein said calcium compound is at least one kind selected from the group consisting of calcium gluconate, calcium borogluconate, calcium glycerophosphate, calcium chloride, calcium lactate, calcium propionate, calcium pantothenate, calcium citrate and calcium hydrogenphosphate.

16. A method for manufacturing the light-emitting device according to any one of claims 1 to 15 in which a light-emitting element is placed on a wiring pattern, with said wiring pattern and an upper portion of said light-emitting element being connected with each other by a bonding wire, comprising the step of:

sealing a phosphor kneaded matter obtained from a phosphor kneaded matter packaging container on said wiring pattern and said light-emitting element by using a sealing resin.