Light-emitting device, lighting device including the light-emitting device, and method of manufacturing the light-emitting device

• US 9,022,828 B2
• Filed: 09/12/2012
• Issued: 05/05/2015
• Est. Priority Date: 09/21/2011
• Status: Active Grant

• Current Assignee: Citizen Watch Co Limited (Citizen Electronics Company Limited)
• Original Assignee: Citizen Electronics Company Limited, Citizen Holdings Co., Ltd. (Citizen Electronics Company Limited)
• Inventors: Imai, Sadato
• Primary Examiner(s): Patel, Ashok
• Application Number:
  US13/612,078
• Publication Number:
  US 20130069525A1
• Time in Patent Office: 965 Days
• Field of Search: None
• US Class Current: 445/24
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• 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 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/505 characterised by the shape, e.g. plate or foil
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H05B 33/02 Details
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources

Abstract

A light-emitting device includes a light-emitting element with a pair of element electrodes as a first element electrode and a second element electrode positioned at the lower surface of the light-emitting element; a phosphor plate disposed on the upper surface of the light-emitting element; a first resin covering the lower surface and the peripheral side surface of the light-emitting element with the first element electrode and the second element electrode partly appearing from the first resin; and a second resin provided in the phosphor plate.

Claims

1. A method manufacturing a light-emitting device comprising:

adhering an upper surface of a light-emitting element to a lower surface of a phosphor plate;

disposing a first resin on the lower surface of the phosphor plate to cover a peripheral side surface and a lower surface of the light-emitting element with a pair of element electrodes partly appearing from the first resin;

forming a groove along one of peripheral edges of the upper surface of the phosphor plate; and

filling a second resin in the groove.

2. A method manufacturing a light-emitting device comprising:

preparing a phosphor plate assembly;

adhering upper surfaces of a plurality of light-emitting elements with a space between each of the light-emitting elements to a lower surface of the phosphor plate assembly;

disposing a first resin on the lower surface of the phosphor plate assembly to cover a peripheral side surface and a lower surface of each of the light-emitting elements with a pair of element electrodes of each of the light-emitting elements partly appearing from the first resin to form an aggregation;

forming grooves in the phosphor plate assembly included in the aggregation at positions along one of peripheral edges of the upper surface of the phosphor plate assembly adjacent to one of peripheral edges of the upper surface of each of light-emitting elements;

filling a second resin into the grooves in the phosphor plate assembly included in the aggregation; and

dicing the aggregation between each of the light-emitting elements to divide the aggregation into a plurality of light emitting devices.

3. A method manufacturing a light-emitting device comprising:

preparing a phosphor plate assembly including grooves provided with a space between each of the grooves; and

adhering upper surfaces of a plurality of light-emitting elements adjacent to the grooves with a space between each of the light-emitting elements, to a lower surface of the phosphor plate assembly,

disposing a white resin on the lower surface of the phosphor plate assembly to cover a peripheral side surface and a lower surface of each of the light-emitting elements with a pair of element electrodes of each of the light-emitting elements partly appearing from the white resin to form an aggregation and to fill the white resin into the grooves in the phosphor plate assembly included in the aggregation; and

dicing the aggregation between each of the light-emitting elements to divide the aggregation into a plurality of light emitting devices.

4. A method manufacturing a light-emitting device comprising:

preparing a phosphor plate assembly including grooves provided with a space between each of the grooves;

adhering upper surfaces of a plurality of light-emitting elements adjacent to the grooves with a space between each of the light-emitting elements, to a lower surface of the phosphor plate assembly;

disposing a first resin on the lower surface of the phosphor plate assembly to cover a peripheral side surface and a lower surface of each of the light-emitting elements with a pair of element electrodes of each of the light-emitting elements partly appearing from the first resin to form an aggregation;

filling a second resin into the grooves in the phosphor plate assembly included in the aggregation; and

dicing the aggregation between each of the light-emitting elements to divide the aggregation into a plurality of light emitting devices.

5. A method manufacturing a light-emitting device comprising:

preparing a phosphor plate assembly including grooves provided with a space between each of the grooves in that a colored resin filled;

adhering upper surfaces of a plurality of light-emitting elements adjacent to the grooves in that the colored resin filled, with a space between each of the light-emitting elements, to a lower surface of the phosphor plate assembly;

disposing a white resin on the lower surface of the phosphor plate assembly to cover a peripheral side surface and a lower surface of each of the light-emitting elements with a pair of element electrodes of each of the light-emitting elements partly appearing from the white resin to form an aggregation; and

dicing the aggregation between each of the light-emitting elements to divide the aggregation into a plurality of light emitting devices.