Light emitting apparatus and production method thereof

• US 10,741,729 B2
• Filed: 01/05/2016
• Issued: 08/11/2020
• Est. Priority Date: 10/29/2010
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Nichia Corporation
• Inventors: Miyoshi, Tomonori, Ozeki, Kenji, Tsuruha, Tomoaki
• Primary Examiner(s): Purvis, Sue A
• Assistant Examiner(s): Stowe, Scott
• Application Number:
  US14/988,319
• Publication Number:
  US 20160133800A1
• Time in Patent Office: 1,680 Days
• CPC Class Codes: H01L 2224/16 of an individual bump connector
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 33/483 Containers
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• 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 33/58 Optical field-shaping elements
• 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
• CPC Class Codes: H01L 33/641 characterized by the materials

Abstract

A light emitting apparatus includes an electrically insulating base member; a first electrically conductive pattern portion and a second electrically conductive pattern portion formed on an upper surface of the base member; a plurality of intermediate electrically conductive pattern portions arranged between the first and second electrically conductive pattern portions; at least one light emitting device mounted on at least one of the intermediate electrically conductive pattern portions; a protection element mounted on the first and second electrically conductive pattern portions; and a resin portion disposed around the at least one light emitting device such that (i) the first and second electrically conductive pattern portions are partially covered by the resin portion and partially exposed from the resin portion, and (ii) the protection element is covered by the resin portion.

Claims

1. A light emitting apparatus comprising:

an electrically insulating base member;

a first electrically conductive pattern portion formed in direct contact with a first area of an upper surface of the base member;

a second electrically conductive pattern portion formed in direct contact with a second area of an upper surface of the base member, the second area being different from the first area;

a plurality of intermediate electrically conductive pattern portions formed in direct contact with a third area of the upper surface of the base member at a location between part of the first electrically conductive pattern portion and part of the second electrically conductive pattern portion in a lateral direction, the third area being different from the first and second areas, wherein the first electrically conductive pattern portion and the second electrically conductive pattern portion are separated from the plurality of intermediate electrically conductive pattern portions;

a first light emitting device mounted on and electrically connected to the first electrically conductive pattern portion and a first of the intermediate electrically conductive pattern portions at a location above the first area and the third area of the upper surface of the base member;

a protection element mounted on and electrically connected to the first and second electrically conductive pattern portions at a location above the first area and the second area of the upper surface of the base member; and

a resin portion disposed around the first light emitting device such that (i) the first and second electrically conductive pattern portions are partially covered by the resin portion and partially exposed from the resin portion, and (ii) the protection element is covered by the resin portion.

2. The light emitting apparatus according to claim 1, further comprising a transparent member disposed on the first light emitting device.

3. The light emitting apparatus according to claim 2, wherein an upper surface of the transparent member is exposed from the resin portion to form a light emission surface of the light emitting apparatus.

4. The light emitting apparatus according to claim 2, wherein the transparent member includes a phosphor.

5. The light emitting apparatus according to claim 4, wherein the transparent member is made of sintered phosphor.

6. The light emitting apparatus according to claim 2, wherein a thickness of the transparent member is 50-300 μ

m.

7. The light emitting apparatus according to claim 1, further comprising a frame surrounding the first light emitting device, the protection element, and the resin portion.

8. The light emitting apparatus according to claim 7, wherein, in a plan view, the frame has a rectangular shape with rounded corners.

9. The light emitting apparatus according to claim 1, further comprising:

a second light emitting device mounted on and electrically connected to a second of the intermediate electrically conductive pattern portions and the second electrically conductive pattern portion, and

a least one additional light emitting device electrically connected in series between the first intermediate electrically conductive pattern portion and the second intermediate electrically conductive pattern portion.

10. The light emitting apparatus according to claim 9, wherein the first light emitting device, the second light emitting device, and the at least one additional light emitting device are linearly aligned.

11. The light emitting apparatus according to claim 1, wherein a thickness of the base member is greater than a height from an upper surface of the base member to a light emission surface of the light emitting apparatus.

12. The light emitting apparatus according to claim 1, wherein a heat conductivity of the base member is 150 W/m·

K or more.

13. The light emitting apparatus according to claim 1, wherein the base member is made of aluminum nitride.

14. The light emitting apparatus according to claim 1, wherein the first and second electrically conductive pattern portions include portions that extend from the resin portion toward different outer peripheral edges of the base member.

15. The light emitting apparatus according to claim 14, wherein each of the first and second electrically conductive pattern portions includes an elongated portion extending toward a same outer peripheral edge of the base member.

16. The light emitting apparatus according to claim 1, wherein the resin portion comprises a reflective material.

17. The light emitting apparatus according to claim 7, wherein the intermediate electrically conductive pattern portions are located inside the frame and spaced apart from a periphery of the frame.