Light-emitting device and manufacturing method thereof

• US 10,388,838 B2
• Filed: 10/19/2017
• Issued: 08/20/2019
• Est. Priority Date: 10/19/2016
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Genesis Photonics Inc.
• Inventors: Hung, Chin-Hua, Hung, Cheng-Wei, Lin, Yu-Feng, Chen, Cheng-Chuan
• Primary Examiner(s): Assouman, Herve-Louis Y
• Application Number:
  US15/787,811
• Publication Number:
  US 20180138378A1
• Time in Patent Office: 670 Days
• Field of Search: None
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/0075 comprising nitride compounds
• CPC Class Codes: H01L 33/26 Materials of the light emitting region
• CPC Class Codes: H01L 33/387 with a plurality of electrode regions in direct contact with the semiconductor body and being electrically interconnected by another electrode layer
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• 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 33/642 characterized by the shape

Abstract

A light-emitting device includes a substrate, a light-emitting component, a translucent layer, an adhesive layer, a reflective layer and translucent encapsulant. The light-emitting component is disposed on the substrate. The adhesive layer is formed between the light-emitting component and the translucent layer. The reflective layer is formed above the substrate and covering a lateral surface of the light-emitting component, a lateral surface of the adhesive layer and a lateral surface of the translucent layer. The translucent encapsulant is formed on the substrate and encapsulating the light-emitting component, the translucent layer and the reflective layer.

Claims

1. A light-emitting device, comprises:

a substrate;

a light-emitting component coupled to the substrate;

a wavelength conversion layer comprising a high-density phosphor layer and a low-density phosphor layer;

an adhesive layer adhering the wavelength conversion layer directly to an upper surface of the light-emitting component and covering a portion of a lateral surface of the light-emitting component, wherein the high-density phosphor layer faces to the upper surface of the light-emitting component;

a reflective layer formed above the substrate and covering the light-emitting component, the adhesive layer and the wavelength conversion layer to expose an upper surface of the wavelength conversion layer, wherein a curved surface of the reflective layer is inclined to the lateral surface of the light-emitting component and reflects a light emitted from the light-emitting component back into the high-density phosphor layer; and

a dome-shaped lens layer formed on the substrate and encapsulating the light-emitting component, the wavelength conversion layer, the adhesive layer and the reflective layer.

2. The light-emitting device according to claim 1, wherein the dome-shaped lens layer encapsulates a lateral surface of an electrode of the light-emitting component.

3. The light-emitting device according to claim 1, wherein the dome-shaped lens layer is spaced from the substrate.

4. The light-emitting device according to claim 1, wherein the light-emitting device has a flat lateral surface comprising the dome-shaped lens layer and the substrate.

5. The light-emitting device according to claim 3, wherein the reflective layer has a lower portion disposed between the dome-shaped lens and the substrate.

6. The light-emitting device according to claim 1, wherein the reflective layer is spaced from the substrate.

7. The light-emitting device according to claim 5, wherein the light-emitting device has a flat lateral surface comprising the dome-shaped lens layer, the reflective layer and the substrate.

8. The light-emitting device according to claim 6, wherein the light-emitting component has a body and electrodes disposed on a bottom surface thereof, and a bottom surface of the reflective layer is not lower than the bottom surface of the body of the light-emitting component.

9. The light-emitting device according to claim 1, wherein the dome-shaped lens layer comprises resin containing phosphor particles.

10. The light-emitting device according to claim 1, wherein a thickness of the low-density phosphor layer is larger than a thickness of the high-density phosphor layer.

11. The light-emitting device according to claim 1, wherein an upper surface of the reflective layer and the upper surface of the wavelength conversion layer are coplanar.