Light-emitting diode package

• US 9,716,214 B2
• Filed: 05/05/2016
• Issued: 07/25/2017
• Est. Priority Date: 06/16/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yoon, Ju-heon, Kim, Hak-hwan, Kim, Dae-sup, Kim, Jeong-hee, Shin, Dong-myung, Yun, Kwang-seok
• Primary Examiner(s): FOURSON III, GEORGE R
• Application Number:
  US15/147,315
• Publication Number:
  US 20160372646A1
• Time in Patent Office: 446 Days
• Field of Search: 257 79
• CPC Class Codes: H01L 33/16 with a particular crystal structure or orientation, e.g. polycrystalline, amorphous or porous
• CPC Class Codes: H01L 33/20 with a particular shape, e.g. curved or truncated substrate
• CPC Class Codes: H01L 33/38 with a particular shape
• 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: H05B 45/20 Controlling the colour of the light

Abstract

An LED package includes a substrate, a light-emitting structure provided on the substrate, an electrode structure provided on the light-emitting structure, and an external connection terminal provided on the electrode structure, the external connection terminal comprising a major axis and a minor axis. The major axis of the external connection terminal is perpendicular to a cleaving plane of the substrate.

Claims

1. A light-emitting diode (LED) package comprising:

a substrate;

a light-emitting structure provided on the substrate;

an electrode structure provided on the light-emitting structure; and

an external connection terminal provided on the electrode structure, the external connection terminal comprising a major axis and a minor axis,

wherein the major axis of the external connection terminal is perpendicular to an m(10-10) plane of the substrate.

2. The LED package of claim 1, wherein the major axis corresponds to an extending direction of a first side of the external connection terminal which is longer than a second side of the external connection terminal, the second side extending in a direction substantially perpendicular to the first side, and

wherein the minor axis extends in a direction substantially perpendicular to the major axis.

3. The LED package of claim 1, wherein the substrate transmits light, and

wherein the light generated by the light-emitting structure is emitted in a direction toward the substrate.

4. The LED package of claim 1, wherein the substrate is a sapphire substrate.

5. The LED package of claim 1, wherein a portion of the substrate comprises a straight flat zone, and

wherein the flat zone corresponds to a (11-20) plane from among crystal planes of the substrate.

6. The LED package of claim 1, wherein the light-emitting structure comprises:

a first conductive semiconductor layer;

an active layer; and

a second conductive semiconductor layer.

7. The LED package of claim 1, wherein the light-emitting structure comprises a gallium nitride based material.

8. The LED package of claim 1, wherein the electrode structure comprises:

a first electrode structure; and

a second electrode structure, and

wherein the external connection terminal comprises;

a first external connection terminal that is electrically connected to the first electrode structure; and

a second external connection terminal that is electrically connected to the second electrode structure.

9. The LED package of claim 8, wherein the first external connection terminal comprises at least one first conductive sub-terminal, and

wherein the second external connection terminal comprises at least one second conductive sub-terminal.

10. The LED package of claim 1, wherein the substrate comprises a stress concentration area having a stress of 1 GPa or more being concentrated, and

wherein the stress concentration area is provided on a surface of the substrate that is parallel to the major axis of the external connection terminal.

11. The LED package of claim 1, wherein, in response to a crack being on the substrate, a spreading direction of the crack is perpendicular to an extending direction of the major axis of the external connection terminal.

12. An LED package comprising:

a sapphire substrate;

a light-emitting structure provided on the sapphire substrate, the light-emitting structure comprising;

a first conductive semiconductor layer;

an active layer; and

a second conductive semiconductor layer;

a first electrode structure electrically connected to the first conductive semiconductor layer;

a second electrode structure electrically connected to the second conductive semiconductor layer;

a first external connection terminal electrically connected to the first electrode structure and comprising a first major axis and a first minor axis; and

a second external connection terminal electrically connected to the second electrode structure and comprising a second major axis and a second minor axis,

wherein light generated from the light-emitting structure is emitted in a direction toward the sapphire substrate,

wherein the first and second external connection terminals are spaced apart from each other, and

wherein an extending direction of the major axes of the first and the second external connection terminals are perpendicular to an extending direction of an m(10-10) plane of the sapphire substrate.

13. The LED package of claim 12, wherein the first major axis corresponds to an extending direction of a first side of the first external connection terminal which is longer than a second side of the first external connection terminal, the second side of the first external connection terminal extending in a direction substantially perpendicular to the first side of the first external connection terminal,

wherein the first minor axis extends in a direction substantially perpendicular to the first major axis,

wherein the second major axis corresponds to an extending direction of a first side of the second external connection terminal which is longer than a second side of the second external connection terminal, the second side of the second external connection terminal extending in a direction substantially perpendicular to the first side of the second external connection terminal, and

wherein the second minor axis extends in a direction substantially perpendicular to the second major axis.

14. The LED package of claim 12, wherein a crystal plane of an upper surface of the sapphire substrate corresponds to a (0001) plane or a (000-1) plane, the light-emitting structure provided on the upper surface of the sapphire substrate.

15. The LED package of claim 12, wherein the first external connection terminal comprises at least one first conductive sub-terminal, and

wherein the second external connection terminal comprises at least one second conductive sub-terminal.

16. The LED package of claim 12, wherein the first and the second electrode structures reflect the light generated from the light-emitting structure.

17. A light-emitting diode (LED) package comprising:

a substrate;

a light-emitting structure provided on the substrate;

an electrode structure provided on the light-emitting structure; and

an external connection terminal provided on the electrode structure, the external connection terminal comprising a major axis and a minor axis,

wherein the major axis of the external connection terminal is perpendicular to a cleaving plane of the substrate.

18. The LED package of claim 17, wherein the cleaving plane of the substrate corresponds to an m(10-10) plane among crystal planes of the substrate.

19. The LED package of claim 17, wherein the major axis corresponds to an extending direction of a first side of the external connection terminal which is longer than a second side of the external connection terminal, the second side extending in a direction substantially perpendicular to the first side, and

wherein the minor axis extends in a direction substantially perpendicular to the major axis.

20. The LED package of claim 17, wherein, in response to a crack being on the substrate, a spreading direction of the crack is perpendicular to an extending direction of the major axis of the external connection terminal.