Patent ID: 8354663

Claim:
An ultraviolet light-emitting device comprising: a template comprising: a first buffer layer, said buffer layer being trenched, and a second buffer layer being coalesced over said first buffer layer, said second buffer layer comprising Al x In y Ga 1-x-y N, wherein 0<x≦1, 0≦y≦1, 0<x+y≦1; a first layer with a first conductivity on said template; wherein said first layer comprises an array of mesas; light emitting quantum well regions on each mesa of said mesas; a second layer with a second conductivity on each quantum well region of said quantum well regions; a first electrical contact in electrical connection with said first layer; a current spreading layer in electrical connection with said first electrical contact wherein said current spreading layer is no further than a current spreading length of any portion of said first layer; a second electrical contact in electrical connection with each said second layer; a leakage suppression layer in between each mesa of said mesas; a third electrical contact in electrical connection with said second electrical contact on each mesa of said mesas; whereby, when an electrical potential is applied to said first and third electrical contacts, said device emits ultraviolet light.