Light-emitting element
A light-emitting element comprises a light-emitting semiconductor stack comprising a first semiconductor layer, a second semiconductor layer on the first semiconductor layer, and a light-emitting layer between the first semiconductor layer and the second semiconductor layer; a plurality of extensions formed on the first semiconductor layer; and a first conductive part and a second conductive part formed on the light-emitting semiconductor stack and respectively electrically connected to the first semiconductor layer and the second semiconductor layer, wherein one of the plurality of extensions is formed beyond a projected area of the second conductive part and not covered by the first conductive part.
1. A light-emitting element, comprising:
a light-emitting semiconductor stack comprising:
a first semiconductor layer;
a second semiconductor layer on the first semiconductor layer; and
a light-emitting layer between the first semiconductor layer and the second semiconductor layer;
a plurality of extensions formed on the first semiconductor layer; and
a first conductive part and a second conductive part formed on the light-emitting semiconductor stack and respectively electrically connected to the first semiconductor layer and the second semiconductor layer, wherein one of the plurality of extensions is formed beyond a projected area of the second conductive part and not covered by the first conductive part.
2. The light-emitting element according to claim 1 , wherein the extensions are spaced apart from each other.
3. The light-emitting element according to claim 1 , wherein the first semiconductor layer is electrically connected to the first conductive part through the plurality of extensions.
4. The light-emitting element according to claim 1 , further comprising a first protection layer formed on or above the light-emitting semiconductor stack, wherein the first protection layer defines a plurality of first through holes and a plurality of second through holes.
5. The light-emitting element according to claim 4 , wherein the first conductive part covers the plurality of first through holes and the second conductive part covers the plurality of second through holes.
6. The light-emitting element according to claim 1 , further comprising a transparent conductive electrode formed on or above the second semiconductor layer.
7. The light-emitting element according to claim 6 , further comprising a second protection layer formed on or above a surface of the transparent conductive electrode.
8. The light-emitting element according to claim 7 , further comprising a barrier layer formed on or above a surface of the transparent conductive electrode.
9. The light-emitting element according to claim 8 , wherein the barrier layer comprises metal material.
10. The light-emitting element according to claim 8 , further comprising a reflective layer formed between the barrier layer and the transparent conductive electrode.
11. A light-emitting element, comprising:
a light-emitting semiconductor stack comprising:
a first semiconductor layer;
a second semiconductor layer on the first semiconductor layer; and
a light-emitting layer between the first semiconductor layer and the second semiconductor layer;
a first protection layer formed on the light-emitting semiconductor stack;
an extension comprising metal material formed on the light-emitting semiconductor stack and covered by the first protection layer; and
a first conductive part and a second conductive part are formed on the light-emitting semiconductor stack and respectively electrically connected to the first semiconductor layer and the second semiconductor layer, wherein the extension is formed beyond a projected area of the second conductive part and not covered by the first conductive part.
12. The light-emitting element according to claim 11 , wherein the extension comprises an inclined sidewall.
13. The light-emitting element according to claim 11 , further comprising a reflective layer formed on the one first extension.
14. The light-emitting element according to claim 11 , further comprising a barrier layer formed on the one first extension.
15. The light-emitting element according to claim 14 , wherein the barrier layer covers and surrounds the reflective layer.
16. The light-emitting element according to claim 11 , wherein the first conductive part and the second conductive part comprise a distance there between, and the distance is at least 50 μm.
17. The light-emitting element according to claim 11 , further comprising a first electrode between the light-emitting semiconductor stack and the first protection layer, and the first protection layer further comprises a first through hole at a position above the first electrode, wherein the first conductive part is electrically connected to the first electrode through the second through hole.
18. The light-emitting element according to claim 11 , further comprising a second electrode between the light-emitting semiconductor stack and the first protection layer, and the first protection layer further comprises a second through hole at a position above the second electrode, wherein the second conductive part is electrically connected to the second electrode through the second through hole.
19. The light-emitting element according to claim 11 , wherein a surface area of an upper surface of the first conductive part is equal to a surface area of an upper surface of the second conductive part.
20. The light-emitting element according to claim 11 , wherein a height of the first conductive part is equal to a height of the second conductive part.