Light emitting diode with high efficiency

A light emitting diode comprising:

• a substrate;
• a semiconductor stack, wherein the semiconductor stack is disposed on the substrate, and the semiconductor stack further comprises a lower semiconductor layer, an upper semiconductor layer, an active layer, and an isolation groove, wherein the active layer is interposed between the lower semiconductor layer and the upper semiconductor layer, and the isolation groove exposes the substrate through the upper semiconductor layer, the active layer and the lower semiconductor layer;
• a first electrode pad;
• an upper extension portion, wherein the upper extension portion and the first electrode pad are both electrically connected to the upper semiconductor layer;
• a second electrode pad;
• a lower extension portion extending along a first direction, wherein the lower extension portion and the second electrode pad are both electrically connected to the lower semiconductor layer;
• a connecting portion, wherein the connecting portion connects the upper extension portion and the lower extension portion to each other across the isolation groove, a width of the connecting portion is greater than a width of the upper extension portion and a width the lower extension portion, and the connecting portion includes a first connecting portion and a second connecting portion spaced apart in a second direction intersecting the first direction;
• a first current blocking layer disposed under the upper extension portion;
• and
• a first insulating layer, wherein the first insulating layer is interposed between the connecting portion and the isolation groove in the first direction and exposes the isolation groove in the second direction, a width of the first insulating layer is greater than a width of the connecting portion, and the first current blocking layer connects to the first insulating layer,
• wherein the first electrode pad faces the second electrode pad with the isolation groove interposed therebetween, and
• wherein the first connecting portion and the second connecting portion are disposed to oppose each other with respect to an imaginary line connecting the first electrode pad and the second electrode pad.