Light emitting diode and method of fabricating the same
View Patent ↗Exemplary embodiments of the present invention disclose a light emitting diode (LED) and a method of fabricating the same. The LED includes a substrate, a semiconductor stack arranged on the substrate, the semiconductor stack including an upper semiconductor layer having a first conductivity type, an active layer, and a lower semiconductor layer having a second conductivity type, isolation trenches separating the semiconductor stack into a plurality of regions, connectors disposed between the substrate and the semiconductor stack, the connectors electrically connecting the plurality of regions to one another, and a distributed Bragg reflector (DBR) having a multi-layered structure, the DBR disposed between the semiconductor stack and the connectors. The connectors are electrically connected to the semiconductor stack through the DBR, and portions of the DBR are disposed between the isolation trenches and the connectors.
1. A light-emitting diode (LED), comprising:
a substrate;
a semiconductor stack arranged on the substrate;
isolation trenches separating the semiconductor stack into a plurality of regions; and
connectors disposed between the substrate and the semiconductor stack, the connectors electrically connecting the plurality of regions to one another in a first serial array and a second serial array,
wherein the first serial array and the second serial array are connected in reverse parallel, the first serial array to emit light during a first half period of alternating current (AC) power and the second serial array to emit light during a second half period of AC power, and
wherein at least a portion of at least one of the connectors is disposed below the semiconductor stack and the isolation trenches, as well as between the semiconductor stack and the substrate.
2. The LED of claim 1 , further comprising a distributed Bragg reflector (DBR) comprising a multi-layered structure, the DBR disposed between the semiconductor stack and the connectors,
wherein the connectors are electrically connected to the semiconductor stack through the DBR, and portions of the DBR are disposed directly between the isolation trenches and the connectors, and
wherein the DBR comprises an insulation layer.
3. The LED of claim 1 , wherein the semiconductor stack comprises:
a first semiconductor layer comprising a first conductivity type;
an active layer; and
a second semiconductor layer comprising a second conductivity type.
4. The LED of claim 2 , wherein a first region and a second region of the plurality of regions each comprise portions of the first serial array and portions of the second serial array, the first serial array and the second serial array being separated by the DBR.
5. The LED of claim 2 , wherein a third region of the plurality of regions comprises a portion of the first serial array and a portion of the second serial array that is not separated by the DBR.