Patent ID: 7682854

Claim:
A method of making light emitting diodes, comprising the steps of: forming a semiconductor structure including an active layer on a first side of a substrate, the active layer generating photons; forming a transparent conductive layer on the semiconductor structure, the transparent conductive layer comprising indium-tin-oxide (ITO); reducing a surface roughness of a second side of the substrate using at least one of a mechanical polishing method and a dry etching method; forming a reflective layer on the second side of the substrate to reflect the photons from the active layer after reducing the surface roughness; forming scribe lines on the substrate using dry etching method, the scribe lines defining individual light emitting diodes; and separating the light emitting diodes with the scribe lines, wherein the reducing a surface roughness of a second side of the substrate is performed such that the surface roughness is substantially less than 15 nm.