Light emitting device and manufacturing method thereof

• US 8,975,648 B2
• Filed: 02/04/2011
• Issued: 03/10/2015
• Est. Priority Date: 02/09/2010
• Status: Expired due to Fees

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hirose, Takehito, Kato, Tadashi, Ishihara, Yurika, Oshima, Yukitoyo
• Primary Examiner(s): HO, HOANG QUAN TRAN
• Application Number:
  US13/021,166
• Publication Number:
  US 20110193118A1
• Time in Patent Office: 1,495 Days
• Field of Search: None
• 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 directly 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 first 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; and

a thin-film layer which is provided between the mounting substrate and the first resin layer,

wherein the thin-film layer comprises a transparent resin and a second phosphor which is excited with the luminescence wavelength of the solid-state light-emitting element,

wherein the thin-film layer is structured to permit at least a portion of the solid-state light-emitting element to be in direct contact with the first resin layer, and

wherein the first resin layer and the second resin layer each comprise;

a dome-shaped convex portion which encloses the solid-state light-emitting element; and

a thin-film portion which is connected to the dome-shaped convex portion and located around the dome-shaped convex portion.

2. The light emitting device according to claim 1, wherein the solid-state light-emitting element is a light emitting diode.

3. The light emitting device according to claim 2, wherein:

the light emitting diode is a blue light emitting diode;

at least one of the first phosphor or the second phosphor comprises a phosphor material 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 material.