LIGHT EMITTING DEVICE AND MANUFACTURING METHOD THEREOF

• US 20110193118A1
• Filed: 02/04/2011
• Published: 08/11/2011
• Est. Priority Date: 02/09/2010
• Status: Active Grant

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ishihara, Yurika, Hirose, Takehito, OSHIMA, Yukitoyo, Kato, Tadashi
• Granted Patent: US 8,975,648 B2
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: B29C 45/14655 connected to or mounted on a carrier, e.g. lead frame
• CPC Class Codes: B29C 45/1671 with an insert
• CPC Class Codes: B29K 2995/0026 Transparent
• CPC Class Codes: B29K 2995/0031 Refractive
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 24/97 the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
• 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 2924/12041 LED
• CPC Class Codes: H01L 2924/1815 Shape
• CPC Class Codes: H01L 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 2933/005 relating to encapsulations
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin

Abstract

A light emitting device includes a first resin layer which is made of transparent resin and provided outside a solid-state light-emitting element mounted on a mounting substrate; and a second resin layer which is provided outside the first resin layer and made of transparent resin that contains a phosphor which is excited with a luminescence wavelength of the solid-state light-emitting element, wherein when the refractive index of the solid-state light-emitting element is set to be N1, the refractive index of the first resin layer is set to be N2, and the refractive index of the second resin layer is set to be N3, the relationship of N1≧N2≧N3≧1 is established.

Claims

1. A light emitting device comprising:

a first resin layer which is made of transparent resin and provided outside a solid-state light-emitting element mounted on a mounting substrate; and

a second resin layer which is provided outside the first resin layer and made of transparent resin that contains a phosphor which is excited with a luminescence wavelength of the solid-state light-emitting element,

wherein when the refractive index of the solid-state light-emitting element is set to be N1, the refractive index of the first resin layer is set to be N2, and the refractive index of the second resin layer is set to be N3, the relationship of N1≧

N2≧

N3≧

1 is established.

2. The light emitting device according to claim 1, wherein the first resin layer and the second resin layer each have a convex portion which encloses the solid-state light-emitting element, and a thin-film portion which is connected to the convex portion and located around the convex portion.

3. The light emitting device according to claim 1, further comprising:

a thin-film portion which is provided corresponding to a portion or the entirety between the mounting substrate and the first resin layer and made of transparent resin that contains a phosphor which is excited with the luminescence wavelength of the solid-state light-emitting element.

4. The light emitting device according to any one of claims 1 to 3, wherein the solid-state light-emitting element is a light emitting diode.

5. The light emitting device according to claim 4, wherein the light emitting diode is a blue light emitting diode, the phosphor is a phosphor which is excited with a luminescence wavelength of the blue light emitting diode, and white light is obtained in a pseudo manner by combination of luminescence of the light emitting diode and luminescence of the phosphor.

6. A method of manufacturing a light emitting device, comprising the steps of:

applying a water-repellent material to a surface of a mounting substrate with a solid-state light-emitting element mounted, on which the solid-state light-emitting element is mounted, so as to surround the solid-state light-emitting element;

forming a first resin layer with a dome shape outside the solid-state light-emitting element by applying transparent resin to the outside of the solid-state light-emitting element; and

forming a second resin layer with a dome shape outside the first resin layer by applying transparent resin that contains a phosphor which is excited with a luminescence wavelength of the solid-state light-emitting element, to the outside of the first resin layer.

7. The method of manufacturing a light emitting device, according to claim 6, wherein the water-repellent material contains fluorine as its constituent.

8. A method of manufacturing a light emitting device, comprising the steps of:

forming a first resin layer made of transparent resin outside a solid-state light-emitting element mounted on a mounting substrate, by using a mold; and

forming a second resin layer made of transparent resin that contains a phosphor which is excited with a luminescence wavelength of the solid-state light-emitting element, outside the first resin layer by using a mold.