Light-emitting element having a plurality of contact parts
View Patent ↗A light-emitting element includes a supportive substrate; a reflective layer formed on the supportive substrate; a transparent layer formed on the reflective layer; a light-emitting stacked layer formed on the transparent layer; an etching-stop layer formed between the transparent layer and the reflective layer; and a plurality of contact parts formed between the light-emitting stacked layer and the transparent layer.
1. A light-emitting element comprising:
a supportive substrate;
a reflective layer formed on the supportive substrate;
a transparent layer formed on the reflective layer;
a light-emitting stacked layer comprising an active layer formed on the transparent layer;
an etching-stop layer formed under the transparent layer and between the transparent layer and the reflective layer, wherein a lateral surface of the etching-stop layer is covered by the reflective layer; and
a plurality of contact parts formed between the light-emitting stacked layer and the transparent layer, and devoid of passing through the active layer.
2. The light-emitting element of claim 1 , further comprising:
a through-hole formed in the light-emitting stacked layer; and
a first electrode formed on the light-emitting stacked layer, wherein the first electrode physically contacts the etching-stop layer via the through-hole.
3. The light-emitting element of claim 1 , wherein the transparent layer comprises conductive material selected from a group consisting of ITO, InO, SnO, CTO, ATO, AZO, ZTO, GZO, ZnO, AlGaAs, GaN, GaP, GaAs, GaAsP, IZO, Ta2O5, GZO, and DLC.
4. The light-emitting element of claim 1 , wherein one of the plurality of contact parts comprises a plurality of sublayers.
5. The light-emitting element of claim 1 , wherein the light-emitting stacked layer comprises a first semiconductor layer, the active layer, and a second semiconductor.
6. The light-emitting element of claim 1 , further comprising a bonding layer between the supportive substrate and the reflective layer.
7. The light-emitting element of claim 1 , wherein a ratio of the area of the plurality of contact parts to the area of the top surface of the active layer is 1% to about 3%.
8. The light-emitting element of claim 1 , further comprising a plurality of conductive parts on the light-emitting stacked layer.
9. The light-emitting element of claim 8 , wherein the plurality of contact parts is arranged into two lines between any two adjacent conductive parts.
10. The light-emitting element of claim 5 , wherein the etching-stop layer is formed between the transparent layer, the reflective layer, and the first semiconductor layer.
11. The light-emitting element of claim 1 , wherein a ratio of the area of the plurality of contact parts to the area of a top surface of the active layer is about 0.5 % to about 6%.