Fabricating a low leakage current LED

摘要

A method of reducing the leakage current of a III-V compound semiconductor device (10) includes providing the device with a confinement layer having two sections (13, 14). A first section (14) has a higher doping concentration than a second section (13). An energy barrier that confines minority carriers to an active layer (12) of the device (10) is formed by diffusing a dopant into a portion of the active layer (12) and the two sections (13, 14) of the confinement layer. During the diffusion, the conductivity type of a portion of the lower doped second section (13) is inverted while the higher doped first section (14) is not inverted.