Light emitting diode and light emitting diode device including the light emitting diode element and method for manufacturing the light emitting diode

• US 7,745,835 B2
• Filed: 06/12/2007
• Issued: 06/29/2010
• Est. Priority Date: 02/28/2003
• Status: Active Grant

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Imai, Sadato, Fukasawa, Koichi, Oishi, Nodoka
• Primary Examiner(s): Parker; Kenneth A
• Assistant Examiner(s): Diaz; Jose R
• Application Number:
  US11/808,587
• Publication Number:
  US 20070246730A1
• Time in Patent Office: 1,113 Days
• Field of Search: 257/81
• US Class Current: 257/81
• CPC Class Codes: H01L 2224/32245 the item being metallic
• 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 2224/48465 the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
• 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 2924/00014 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 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H01L 33/64 Heat extraction or cooling elements
• CPC Class Codes: H01L 33/648 the elements comprising fluids, e.g. heat-pipes

Abstract

A light emitting diode has a base made of heat conductive material, a wire plate made of an insulation material and secured to an upper surface of the base. Conductive patterns are secured to the wire plate, and a light emitting diode element is secured to the base at an exposed mounting area. The light emitting diode element is electrically connected to the conductive patterns.

Claims

1. A light emitting diode comprising:

a base having an electric conducting property;

a wire plate made of insulating material, having at least one hole, and secured to an upper surface of the base;

at least one electric conductive pattern provided on the wire plate;

at least one light emitting diode element including an anode and a cathode, with one of the anode and cathode formed at an upper surface and the other of the anode and cathode formed at a lower surface, the lower surface secured to the upper surface of the base within the hole of the wire plate;

a wire which connects the upper surface of the light emitting diode element to the electric conductive pattern provided on the wire plate, and the lower surface of the light emitting diode element secured to and electrically connected to the base;

the base having at least one projection at the upper surface as a terminal portion.

2. The light emitting diode according to claim 1, wherein thickness of the wire plate with the electric conductive pattern provided thereon and thickness of the projection as the terminal portion are substantially the same.

3. The light emitting diode according to claim 1, wherein the wire plate has at least one notch to expose the projection of the base.

4. A light emitting diode device comprising:

the light emitting diode according to claim 1; and

a circuit board including electric conductive patterns and a hole through which light emitted from the light emitting diode passes;

the light emitting diode being provided at a lower side of the circuit board at the hole of the circuit board, and the electric conductive pattern being provided on the wire plate and the projection as the terminal portion of the light emitting diode being disposed to be in contact with and electrically connected to the electric conductive patterns of the lower side of the circuit board.

5. A light emitting diode device comprising:

at least two light emitting diodes according to claim 1; and

a circuit board including electric conductive patterns and at least two holes through which light emitted from the light emitting diodes pass;

the light emitting diodes being provided at a lower side of the circuit board at the holes of the circuit board, and the electric conductive pattern being provided on the wire plate and the projection of the base in each of the light emitting diodes being disposed to be in contact with and electrically connected to the electric conductive patterns of the lower side of the circuit board.