Method for manufacturing a light emitting device

• US 7,141,442 B2
• Filed: 07/28/2004
• Issued: 11/28/2006
• Est. Priority Date: 08/29/2002
• Status: Expired due to Fees

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Sano, Masaki
• Primary Examiner(s): Geyer, Scott B.
• Application Number:
  US10/900,321
• Publication Number:
  US 20060040416A1
• Time in Patent Office: 853 Days
• Field of Search: 438/14, 438/15, 438/16, 438/22, 438/26, 438/29
• US Class Current: 438/26
• CPC Class Codes: H01L 2224/48091 Arched
• 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 2924/181 Encapsulation
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/50 Wavelength conversion elements

Abstract

A method for manufacturing an LED device includes the steps of mounting an LED on a substrate, sealing the LED with a transparent resin including phosphor particles to form an LED device before being dyed, measuring chromaticity of light from the LED device before being dyed; and dyeing the sealing resin by a dye having a color for correcting the measured chromaticity to a desired color.

Claims

1. A method for manufacturing an LED device comprising the steps of:

mounting an LED on a substrate;

sealing the LED with a transparent resin including phosphor particles to form an LED device before being dyed;

measuring chromaticity of light from the LED device before being dyed; and

dyeing the sealing resin by a dye having a color for correcting the measured chromaticity to a desired color.

2. The method according to claim 1 wherein dyeing of the transparent resin is controlled by at least one condition selected from the group consisting of the concentration of the dye, the temperature of a liquid in which a dye is put, and the time in soaking the LED device before being dyed in the liquid containing the dye.