Light emitting device and manufacturing method thereof

• US 7,026,661 B2
• Filed: 10/03/2003
• Issued: 04/11/2006
• Est. Priority Date: 06/11/2001
• Status: Expired due to Fees

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Murano, Yoshio
• Primary Examiner(s): Pham, Hoai
• Assistant Examiner(s): Farahani, Dana
• Application Number:
  US10/677,229
• Publication Number:
  US 20040069993A1
• Time in Patent Office: 921 Days
• Field of Search: 257/79, 257/98, 257/81, 257/86, 257/99, 257/100, 257/103, 257/95, 257/94, 257/101, 257/433, 257/434, 257/436, 313/512, 438/26, 438/29, 438/32
• US Class Current: 257/100
• CPC Class Codes: H01L 2224/45124 Aluminium (Al) as principal constituent
• 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 2224/85 using a wire connector
• CPC Class Codes: H01L 2224/97 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 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 2924/01005 Boron [B]
• CPC Class Codes: H01L 2924/01006 Carbon [C]
• CPC Class Codes: H01L 2924/01013 Aluminum [Al]
• CPC Class Codes: H01L 2924/01023 Vanadium [V]
• CPC Class Codes: H01L 2924/01029 Copper [Cu]
• CPC Class Codes: H01L 2924/01033 Arsenic [As]
• CPC Class Codes: H01L 2924/01039 Yttrium [Y]
• CPC Class Codes: H01L 2924/01047 Silver [Ag]
• CPC Class Codes: H01L 2924/01078 Platinum [Pt]
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/10329 Gallium arsenide [GaAs]
• CPC Class Codes: H01L 2924/12036 PN diode
• CPC Class Codes: H01L 2924/12041 : LED
• CPC Class Codes: H01L 2933/0041 : relating to wavelength conversion elements
• CPC Class Codes: H01L 33/505 : characterised by the shape, e.g. plate or foil
• CPC Class Codes: H01L 33/54 : having a particular shape
• CPC Class Codes: H01L 33/58 : Optical field-shaping elements
• CPC Class Codes: H01L 33/60 : Reflective elements

Abstract

A light emitting device has a substrate, an LED mounted on the substrate. A first transparent layer seals the LED, and a second transparent layer is provided around the first transparent layer. Particles of fluorescent material are included in the second transparent layer. A reflector layer is formed on outside walls except an upper side.

Claims

1. A light emitting device comprising:

a substrate having a flat upper surface;

an LED mounted on the upper surface of the substrate;

a first transparent layer mounted on the substrate for sealing the LED;

a second transparent layer having an underside surface coextensive with the upper surface of the substrate and mounted on the upper surface of the substrate so as to surround the first transparent layer;

fluorescent material being included in the second transparent layer;

particles of coloring agent included in the second transparent layer; and

a reflector layer formed on peripheral outside walls of the second transparent layer except an upper side thereof.

2. The light emitting device according to claim 1 wherein the second transparent layer has an inverted trapezoid shape in section.