Patent ID: 8643029

Claim:
A light emitting device, comprising: a substrate; a plurality of serially connected nitride semiconductor light emitting cells mounted on the substrate, a top surface of each nitride semiconductor light emitting cell comprising an n-type nitride semiconductor layer or an un-doped nitride semiconductor layer, a bottom surface of each nitride semiconductor light emitting cell comprising a p-type nitride semiconductor layer and a partially exposed n-type nitride semiconductor layer; a first metal layer arranged between the substrate and each nitride semiconductor light emitting cell, the first metal layer contacting the bottom surface of each nitride semiconductor light emitting cell; a first bonding pad connected to the first metal layer of a first nitride semiconductor light emitting cell of the plurality of nitride semiconductor light emitting cells, the first bonding pad penetrating through the substrate; a second metal layer contacting each partially exposed n-type nitride semiconductor layer; a second bonding pad connected to the second metal layer of a second nitride semiconductor light emitting cell of the plurality of nitride semiconductor light emitting cells, the second bonding pad penetrating through the substrate; and a plurality of connection electrodes respectively electrically connecting the n-type nitride semiconductor layers and the p-type nitride semiconductor layers of adjacent nitride semiconductor light emitting cells, the connection electrodes contacting the substrate, wherein the first nitride semiconductor light emitting cell and the second nitride semiconductor light emitting cell are respectively arranged at a first end and a second end of the serially connected nitride semiconductor light emitting cells.