Light emitting device

• US 10,134,967 B2
• Filed: 08/30/2016
• Issued: 11/20/2018
• 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
• Application Number:
  US15/252,174
• Publication Number:
  US 20160372647A1
• Time in Patent Office: 812 Days
• 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 first and second lead frames spaced apart from each other, the first and second lead frames each including a top surface, an opposing bottom surface, and sidewalls arranged between the top surface and the bottom surface thereof, in which at least one of the first and second lead frames include three inset sidewalls that at least partially define a fixing space, the fixing space undercutting at least one of the first lead frame and second lead frame, a light-emitting diode chip disposed on the top surface of the first or second lead frame, and the top surfaces of the first and second lead frames are substantially flat.

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 top surface, an opposing bottom surface, and sidewalls arranged between the top surface and the bottom surface; and

a light-emitting diode chip disposed on the top surface of the first or second lead frame, wherein;

each of the first lead frame and the second lead frame comprises a first undercut sidewall, a second undercut sidewall, and a third undercut sidewall that at least partially define a fixing space, the fixing space being formed by the undercut sidewalls of the first lead frame and the second lead frame,

the top surfaces of the first and second lead frames are substantially flat, and

the first lead frame and the second lead frame face each other in a horizontal direction such that the first undercut sidewall of the first lead frame faces the first undercut sidewall of the second lead frame,

the second undercut sidewall and the third undercut sidewall of the first lead frame are parallel to each other and perpendicular to the first undercut sidewall of the first lead frame, and

the second undercut sidewall and the third undercut sidewall of the second lead frame are parallel to each other and perpendicular to the first undercut sidewall of the second lead frame.

2. The light-emitting device of claim 1, further comprising a resin part disposed in the fixing space to support the first and second lead frames.

3. The light-emitting device of claim 2, wherein at least a part of the bottom surface of the first or second lead frame is exposed to the outside.

4. The light-emitting device of claim 3, wherein the part of the bottom surface exposed to the outside is substantially flat.

5. The light-emitting device of claim 3, wherein the first and second lead frames have substantially the same thickness.

6. The light-emitting device of claim 1, further comprising a fixing hole formed in at least one of the first and second lead frames.

7. The light-emitting device of claim 2, wherein a portion of each of the first and second lead frames is exposed to the outside through a bottom surface thereof.

8. The light-emitting device of claim 7, wherein the portions of the first and second lead frames exposed to the outside are substantially flat.

9. 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 top surface, an opposing bottom surface, and sidewalls arranged between the top surface and the bottom surface; and

a light-emitting diode chip disposed on the top surface of the first or second lead frame, wherein;

each of the first lead frame and the second lead frame comprises a first undercut sidewall, a second undercut sidewall, and a third undercut sidewall that at least partially define a fixing space, the fixing space being formed by the undercut sidewalls of the first lead frame and the second lead frame,

the top surfaces of the first and second lead frames are substantially flat,

the first lead frame and the second lead frame face each other in a horizontal direction such that the first undercut sidewall of the first lead frame faces the first undercut sidewall of the second lead frame,

the second undercut sidewall and the third undercut sidewall of the first lead frame are parallel to each other and perpendicular to the first undercut sidewall of the first lead frame,

the second undercut sidewall and the third undercut sidewall of the second lead frame are parallel to each other and perpendicular to the first undercut sidewall of the second lead frame, and

the top surface of the first and second lead frames are on substantially the same plane.

10. The light-emitting device of claim 9, further comprising a resin part disposed in the fixing space to support the first and second lead frames.

11. The light-emitting device of claim 10, wherein at least a part of the bottom surface of the first or second lead frame is exposed to the outside.

12. The light-emitting device of claim 11, wherein the part of the bottom surface exposed to the outside is substantially flat.

13. The light-emitting device of claim 11, wherein the first and second lead frames have substantially the same thickness.

14. The light-emitting device of claim 9 further comprising a fixing hole formed in at least one of the first and second lead frames.

15. The light-emitting device of claim 10, wherein a portion of each of the first and second lead frames is exposed to the outside through a bottom surface thereof.

16. The light-emitting device of claim 15, wherein the portions of the first and second lead frames exposed to the outside are substantially flat.