Light-emitting device
View Patent ↗The present application is related to a light-emitting device. The present application illustrates a vertical light-emitting device in one embodiment, comprising: a conductive substrate includes a through-hole, a patterned semiconductor structure disposed on a first surface of the substrate, a first bonding pad and a second bonding pad disposed on a second surface of the substrate, a conductive line passing through the through-hole connecting electrically the semiconductor structure layer, and an insulation layer on at least one sidewall of the through-hole insulates the conductive line form the substrate.
1. A light-emitting device, comprising:
a carrier having a top surface with a first surface area and a bottom surface with a second surface area;
a first conductive via having a top surface with a third surface area and a second conductive via having a top surface with a fourth surface area, wherein the first conductive via and the second conductive via each has only one through-hole extending from the top surface of the carrier to the bottom surface of the carrier; and
a semiconductor structure including a first conductive type semiconductor layer on the top surface of the carrier, an active layer on the first conductive type semiconductor layer and a second conductive type semiconductor layer on the active layer, wherein the semiconductor structure overlays the second conductive via;
wherein the sum of the third surface area and the fourth surface area is greater than 40% of the first surface area and smaller than the first surface area.
2. The light-emitting device according to claim 1 , further comprising a conductive adhesive layer between the carrier and the semiconductor structure.
3. The light-emitting device according to claim 1 , wherein the second conductive type semiconductor layer connects electrically with the second conductive via.
4. The light-emitting device according to claim 1 , wherein the top surface of the first conductive via, the top surface of the second conductive via, and the top surface of the carrier are substantially coplanar.
5. The light-emitting device according to claim 1 , wherein the first surface area is substantially the same as or smaller than the second surface area.
6. The light-emitting device according to claim 1 , wherein the first surface area is larger than the second surface area.
7. The light-emitting device according to claim 1 , wherein the third surface area is substantially the same as or smaller than the fourth surface area.
8. The light-emitting device according to claim 1 , wherein the carrier further comprising a tilted sidewall.
9. The light-emitting device according to claim 8 , wherein the tilted sidewall forms an angle between 15 degree and 75 degree with the bottom surface of the carrier, wherein the bottom surface is farther from the semiconductor structure than the top surface.
10. The light-emitting device according to claim 1 , wherein the active layer of the semiconductor structure has a fifth surface area greater than 30% of the first surface area and smaller than the first surface area.
11. The light-emitting device according to claim 1 , wherein the carrier is non-conductive.
12. The light-emitting device according to claim 1 , wherein the semiconductor structure comprises III-nitride material or III-phosphide material.
13. The light-emitting device according to claim 1 , wherein the first conductive via and the second conductive via are bonding pads for being bonded to metal bumps.
14. The light-emitting device according to claim 1 , further comprising a conductive line formed on a sidewall of the semiconductor structure and electrically connecting the first conductive via to the first conductive type semiconductor layer.
15. The light-emitting device according to claim 1 , further comprising an insulation structure between a sidewall of the semiconductor structure and the conductive line.
16. The light-emitting device according to claim 1 , wherein the carrier has a thickness smaller than 200 μm.
17. The light-emitting device according to claim 1 , wherein the carrier is made of flexible material.
18. The light-emitting device according to claim 14 , further comprising a protection layer on the conductive line and the semiconductor structure.
19. The light-emitting device according to claim 1 , wherein the first conductive via and the second conductive via are capable of reflecting a light emitted from the semiconductor structure.
20. The light-emitting device according to claim 1 , wherein the semiconductor structure does not overlay the first conductive via.