Patent ID: 8236585
Filing Date: 2012-08-07
Classification: H01L

Abstract:
1. A method of making lateral type light emitting diodes comprising: providing a substrate having a first side and a second side opposite to the first side; forming a buffer layer on the first side of the substrate; forming a first semiconductor layer on the buffer layer; forming an active layer on the first semiconductor layer; forming a second semiconductor layer on the active layer; forming a transparent conductive layer on the second semiconductor layer, the transparent conductive layer including ITO (indium-tin-oxide); forming a first electrode on the transparent conductive layer, the first electrode including at least one of Ni, Au, Pd, and Pt; forming a second electrode on the first semiconductor layer facing the same direction of the first electrode, the second electrode including at least one of Ti, Al, Au, and Cr; reducing a thickness of the substrate to be less than 350 μm; reducing a surface roughness of a second side of the substrate; and forming a pad on at least one of the first electrode and the second electrode, the pad including Au and having a thickness of more than 5000 Å.