METHOD OF MANUFACTURING LIGHT EMITTING DIODE PACKAGE STRUCTURE

• US 20160155915A1
• Filed: 11/25/2015
• Published: 06/02/2016
• Est. Priority Date: 12/02/2014
• Status: Abandoned Application

• Current Assignee: Achrolux Inc.
• Original Assignee: Achrolux Inc.
• Inventors: Ling, Peiching, Liu, Dezhong
• Application Number:
  US14/952,165
• Publication Number:
  US 20160155915A1
• Time in Patent Office: Days
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• 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 2933/0033 relating to semiconductor body packages
• CPC Class Codes: H01L 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 2933/005 relating to encapsulations
• CPC Class Codes: H01L 2933/0058 relating to optical field-shaping elements
• CPC Class Codes: H01L 2933/0066 relating to arrangements for conducting electric current to or from the semiconductor body
• CPC Class Codes: H01L 33/0095 Post-treatment of devices, e.g. annealing, recrystallisation or short-circuit elimination
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• 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 method of manufacturing a light-emitting package structure is provided. The method includes disposing at least one light emitting element on a carrier and forming a reflective material. The light emitting element has opposite first and second sides and a plurality of third sides connected to the first side and the second side. The light emitting element is disposed on the carrier via the second side. The reflective material is formed on the third side of the light emitting element, so as to form a reflective film.

Claims

1. A method of manufacturing a light-emitting package structure, comprising:

disposing on a carrier at least one light emitting element that has opposite first and second sides and a plurality of third sides connected to the first side and the second side, wherein the light emitting element is disposed on the carrier via the second side; and

forming on the third side of the light emitting element a reflective material that acts as a reflective film.

2. The method of claim 1, wherein the reflective film is formed by a spraying method.

3. The method of claim 1, further comprising forming a reflective film on the first side.

4. The method of claim 1, wherein the second side of the light emitting element has a plurality of electrode pads, and the method further comprises removing the carrier.

5. The method of claim 1, wherein the second side of the light emitting element has a plurality of electrode pads, the first side of the light emitting element has a temporary layer, and the method further comprises:

removing the temporary layer on the first side after the reflective material is formed; and

cutting the reflective film.

6. The method of claim 1, wherein the second side of the light emitting element has a plurality of electrode pads, the first side of the light emitting element has a temporary layer, and the method further comprises:

removing the temporary layer on the first side and the reflective film after the reflective film is formed;

forming a fluorescent layer on the first side; and

cutting the reflective film.

7. The method of claim 1, wherein the first side of the light emitting element has a plurality of electrode pads, and the method further comprises:

forming a reflective film on the first side; and

cutting the reflective film.

8. The method of claim 7, further comprising forming a fluorescent layer on the second side of the light emitting element.

9. The method of claim 7, wherein the first side of the light emitting element has a temporary layer thereon, and the method further comprises removing the temporary layer and the reflective film thereon after the reflective film is formed on the first side.

10. The method of claim 9, wherein the first side or the second side of the light emitting element is a light emitting side.

11. The method of claim 1, wherein the carrier is a metal frame, the light emitting layer is a wafer, and the method further comprises:

cutting the wafer in a plurality of longitudinal and lateral directions prior to forming the reflective material, so as to form a plurality of chips;

forming the reflective film by a spraying method; and

cutting the reflective film and the carrier, so as to obtain a plurality of light emitting diode packages.

12. The method of claim 11, further comprising removing the carrier.

13. The method of claim 11, wherein the wafer is fixed on the carrier and has a temporary layer thereon, and the method further comprises removing the temporary layer and the reflective film on each of the wafers after the reflective film is formed.

14. The method of claim 11, wherein the wafer is fixed on the carrier and has a temporary layer thereon, the step of cutting the wafer further comprises cutting the carrier in the longitudinal and lateral directions to form a plurality of through holes, and the method further comprises:

using the reflective material to form a reflective film encapsulating each of the chips via the through holes; and

removing the temporary layer and the reflective film on each of the chips after the reflective film is formed.

15. The method of claim 11, wherein the carrier is a metal frame having a plurality of open trenches parallel to each other and being penetrated, the light emitting element is a wafer having a temporary layer on an upper surface thereof, and the method further comprises:

cutting the wafer to obtain a plurality of chips prior to forming the reflective material, wherein each of the chips is connected across each of the open trenches;

forming the reflective film to encapsulate each of the chips;

removing the temporary layer and the reflective film on each of the chips; and

cutting the carrier to obtain a plurality of light emitting diode packages.

16. The method of claim 15, wherein the reflective film is formed by a spraying method or a molding method.

17. The method of claim 15, wherein a portion of the open trench is a cutting trench adjacent to a place provided to connect across each of the chips.

18. The method of claim 1, wherein the carrier is a metal frame having a plurality of open trenches parallel to each other and being penetrated, the at least one light emitting element is a plurality of chips connected across the open trenches, each of the chips has a temporary layer on an upper surface thereof, and the method further comprises:

forming the reflective film to encapsulate each of the chips;

removing the temporary layer and the reflective film on each of the chips; and

cutting the carrier to obtain a plurality of light emitting diode packages.