Light-emitting device and method for manufacturing the same

• US 10,355,178 B2
• Filed: 07/23/2018
• Issued: 07/16/2019
• Est. Priority Date: 07/24/2017
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Nichia Corporation
• Inventors: Shioji, Shuji
• Primary Examiner(s): Taylor, Earl N
• Application Number:
  US16/043,102
• Publication Number:
  US 20190027657A1
• Time in Patent Office: 358 Days
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: H01L 2224/32245 the item being metallic
• 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 2224/48257 connecting the wire to a die pad of the item
• CPC Class Codes: H01L 2224/49107 on the semiconductor or solid-state body
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• 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 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• 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 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/36 characterised by the electrodes
• CPC Class Codes: H01L 33/501 characterised by the materials, e.g. binder
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

A light-emitting device includes a light-emitting element and a light-transmissive member containing a phosphor, particles, and a matrix, the phosphor and the particles being dispersed in the matrix, the particles including at least one of surface-treated particles, particles coexisting with a dispersing agent, and surface-treated particles coexisting with a dispersing agent, the particles being dispersed as aggregates, the particles having an average particle diameter in a range of 1 nm to 8 nm, a content of the particles falling within a range of 0.01 parts by mass to less than 5 parts by mass relative to 100 parts by mass of the matrix, a content of the phosphor falling within a range of 100 parts by mass to 300 parts by mass relative to 100 parts by mass of the matrix.

Claims

1. A light-emitting device comprising:

a light-emitting element; and

a light-transmissive member covering the light-emitting element, the light-transmissive member comprising;

a phosphor;

particles; and

a matrix,

wherein the phosphor and the particles are dispersed in the matrix,

wherein the particles comprise at least one of surface-treated particles, particles coexisting with a dispersing agent, and surface-treated particles coexisting with a dispersing agent,

wherein the particles are dispersed as aggregates,

wherein the particles have an average particle diameter in a range of 1 nm to 8 nm,

wherein a content of the particles falls within a range of 0.01 parts by mass to less than 5 parts by mass relative to 100 parts by mass of the matrix, and

wherein a content of the phosphor falls within a range of 100 parts by mass to 300 parts by mass relative to 100 parts by mass of the matrix.

2. The light-emitting device according to claim 1, wherein the particles comprise zirconium oxide.

3. The light-emitting device according to claim 1, wherein the phosphor comprises manganese-activated barium magnesium aluminate and manganese-activated potassium fluorosilicate.

4. The light-emitting device according to claim 1, wherein the matrix comprises a silicone resin, a modified silicone resin, or a hybrid silicone resin.

5. The light-emitting device according to claim 1,

wherein the light-emitting element has an emission peak in a range of 400 nm to 480 nm, and

wherein the aggregates have an average particle diameter of 10 nm to 80 nm.

6. A method for manufacturing a light-emitting device, the method comprising:

mounting a light-emitting element in a depressed portion of a substrate; and

forming a light-transmissive member in the depressed portion to cover the light-emitting element, the light-transmissive member comprising;

a phosphor;

at least one of surface-treated particles, particles coexisting with a dispersing agent, and surface-treated particles coexisting with a dispersing agent; and

a matrix,

wherein the phosphor and the particles are dispersed in the matrix,

wherein the particles are dispersed as aggregates,

wherein the particles have an average particle diameter in a range of 1 nm to 8 nm,

wherein a content of the particles falls within a range of 0.01 parts by mass to less than 5 parts by mass relative to 100 parts by mass of the matrix, and

wherein a content of the phosphor falls within a range of 100 parts by mass to 300 parts by mass relative to 100 parts by mass of the matrix in the forming of the light-transmissive member.