Light emitting device

• US 9,203,006 B2
• Filed: 02/27/2015
• Issued: 12/01/2015
• Est. Priority Date: 11/18/2008
• Status: Active Grant

• Current Assignee: Seoul Semiconductor Co., Ltd.
• Original Assignee: Seoul Semiconductor Co., Ltd.
• Inventors: Seo, Eun Jung, Cho, Jae Ho, Kim, Bang Hyun
• Primary Examiner(s): YUSHIN, NIKOLAY K
• Application Number:
  US14/633,856
• Publication Number:
  US 20150171300A1
• Time in Patent Office: 277 Days
• US Class Current: 1/1
• 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 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 33/483 Containers
• CPC Class Codes: H01L 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/52 Encapsulations
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H01L 33/60 Reflective elements
• 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 first lead frame and a second lead frame spaced apart from each other, the first and second lead frames each including a first portion, and a second portion disposed on the first portion, a light-emitting diode chip disposed on the second portion of the first or second lead frame, and a resin at least partially covering the first and second lead frames. The first and second portions of the first lead frame have different planar shapes from each other, the first and second portions of the second lead frame have different planar shapes from each other, and the second portion of the first or second lead frame includes a first fixing element. A first space is disposed between the first portion of the first lead frame and the first portion of the second lead frame, and the first fixing element is disposed on the first space.

Claims

1. A light-emitting device, comprising:

a first lead frame and a second lead frame spaced apart from each other, the first and second lead frames each comprising a first portion, and a second portion disposed on the first portion;

a light-emitting diode chip disposed on the second portion of the first or second lead frame; and

a resin at least partially covering the first and second lead frames,

wherein the first and second portions of the first lead frame have different planar shapes from each other, the first and second portions of the second lead frame have different planar shapes from each other, and the second portion of the first or second lead frame comprises a first fixing element, and

wherein a first space is disposed between the first portion of the first lead frame and the first portion of the second lead frame, and the first fixing element is disposed on the first space.

2. The light-emitting device of claim 1, wherein a second space is disposed between the second portion of the first lead frame and the second portion of the second lead frame, and the resin is disposed in each of the first fixing element, the first space, and the second space.

3. The light-emitting device of claim 2, wherein the resin is continuously disposed in the first fixing element, the first space and the second space.

4. The light-emitting device of claim 1, wherein the first fixing element comprises a first fixing hole.

5. The light-emitting device of claim 4, wherein the first fixing hole is connected to the first space.

6. The light-emitting device of claim 1, wherein at least one of the first and second lead frames comprises a second fixing element.

7. The light-emitting device of claim 6, wherein the second fixing element comprises a second fixing hole disposed in the first and second portions of at least one of the first and second lead frames.

8. The light-emitting device of claim 6, wherein a side surface of at least one of the first fixing element and the second fixing element comprises a stepped surface or an inclined surface.

9. The light-emitting device of claim 8, wherein the width of a first portion of the second fixing element disposed in the first portion of the at least one of the first and second lead frames is greater than the width of a second portion of the second fixing element disposed in the second portion of at least one of the first and second lead frames.

10. The light-emitting device of claim 6, wherein the resin is at least partially disposed in the first and second fixing elements, and the resin is continuously disposed in the first and second fixing elements.

11. The light-emitting device of claim 1, wherein side surfaces of the first and second portions of at least one of the first and second lead frames comprise stepped side surfaces.

12. The light-emitting device of claim 11, wherein the stepped side surfaces are disposed along three sides of at least one of the first and second lead frames.

13. The light-emitting device of claim 11, wherein at least one of the first and second lead frames comprises a flat side surface extending from an upper surface thereof to a lower surface thereof.

14. The light-emitting device of claim 13, wherein the flat side surface is substantially perpendicular to the upper surface of at least one of the first and second lead frames.

15. The light-emitting device of claim 1, wherein sides of the first portion of at least one of the first or second lead frames are at least partially disposed parallel to sides of the second portion of the at least one of the first and second lead frames.

16. The light-emitting device of claim 1,

wherein the resin is disposed at least partially in the first space, covers sides adjacent and perpendicular to the first space, and extends to the edges of the first and second lead frames,

wherein a first width of the resin is different from a second width of the resin, and

wherein the first width of the resin comprises the width of the first space and the second width of the resin comprises the distance from the sides adjacent and perpendicular to the first space to the edges of the first and second lead frames.

17. The light-emitting device of claim 16, wherein first width is greater than the second width.

18. The light-emitting device of claim 1, further comprising a reflector disposed on the first and second lead frames.

19. The light-emitting device of claim 1, wherein the second portion of at least one of the first and second lead frames comprises an inclined surface.