Light-emitting device having transparent package and manufacturing method
View Patent ↗The present disclosure provides a method for forming a light-emitting device and a light-emitting device formed thereby. The method comprises the steps of providing a transparent substrate, forming multiple pairs of electrode pins on the transparent substrate wherein each pair of electrode pins comprises two electrode pins, providing multiple LED dies on the transparent substrate wherein each LED die comprises two electrodes, providing multiple pairs of metal wires wherein each pair of metal wires comprises two metal wires correspondingly connecting the two electrodes of each LED die with the two electrode pins of each pair of electrode pins, and cutting the transparent substrate to form multiple light-emitting devices.
1. A method for forming a light-emitting device, comprising:
providing a transparent substrate;
providing an LED die on the transparent substrate, and the LED die comprising two electrodes, a first surface and a second surface opposite to the first surface, wherein both of the two electrodes are located on the first surface;
providing a second substrate; and
bonding the transparent substrate to the second substrate to locate the LED die between the transparent substrate and the second substrate, and the LED die is enclosed by the transparent substrate and the second substrate,
wherein two electrode pins are located between the transparent substrate and the second substrate, and the two electrodes of the LED die respectively connect to the two electrode pins without wire bonding process,
wherein the first surface comprises a side and the two electrode pins extend in parallel from the side of the LED die toward a same direction away from the side, and
wherein each of the two electrode pins comprises a first end and a second end opposite to the first end, and the first end is sandwiched by the LED die and the second substrate, and the second end extends out of the transparent substrate and the second substrate.
2. The method of claim 1 , further comprising encapsulating the light-emitting device by a package material.
3. The method of claim 2 , wherein the package material comprises a phosphor material dispersed therein.
4. The method of claim 1 , further comprising forming a cavity in the transparent substrate for disposing the LED die before the step of providing the LED die on the transparent substrate.
5. The method of claim 4 , further comprises disposing a phosphor material in the cavity, and the LED die is on the phosphor material.
6. The method of claim 1 , wherein the transparent substrate comprises a transparent material selected from glass, sapphire (Al 2 O 3 ), CVD diamond, or aluminum nitride (AlN).
7. The method of claim 1 , further comprising forming a self-heat-dissipating layer on the transparent substrate and/or the second substrate, wherein the LED die is disposed on the self-heat-dissipating layer.
8. The method of claim 7 , wherein the self-heat-dissipating layer comprises a transparent material with a thermal conductivity greater than 100 W/mK.
9. The method of claim 7 , wherein the self-heat-dissipating layer comprises a carbon-containing electrically non-conductive material.
10. The method of claim 9 , wherein the carbon-containing electrically non-conductive material comprises diamond or diamond-like-carbon (DLC).
11. The method of claim 7 , wherein the self-heat-dissipating layer contacts the electrode pins.
12. The method of claim 7 , wherein the self-heat-dissipating layer comprises a carbon-containing electrically conductive material.
13. The method of claim 12 , wherein the carbon-containing electrically conductive material comprises graphene.
14. The method of claim 1 , wherein bonding the transparent substrate to the second substrate to bring the two electrodes of the LED die in contact with the two electrode pins respectively.
15. The method of claim 1 , further comprises forming a phosphor layer on the transparent substrate.
16. The method of claim 1 , further comprises coating a phosphor material on the transparent substrate and /or the second substrate.
17. The method of claim 1 , wherein the second substrate comprises a phosphor material.
18. The method of claim 1 , wherein both of the two electrodes deposit near the side of the first surface.
19. The method of claim 1 , wherein the two electrode pins locate on the second substrate before bonding the transparent substrate to the second substrate.
20. The method of claim 1 , wherein the electrode pins cross the side of the LED die after bonding the transparent substrate to the second substrate.