OPTICAL DIODE STRUCTURE AND MANUFACTURING METHOD THEREOF

摘要

An optical diode structure includes a semiconductor substrate, a luminous layer, a first type semiconductor layer and a second type semiconductor. The luminous layer is disposed over the semiconductor substrate for emitting light. The first type semiconductor layer is formed between the semiconductor substrate and the luminous layer. The second type semiconductor layer has a first surface and a second surface. The first surface is in contact with the luminous layer. A rough-surfaced grating structure is formed in the second surface for modulating the light emitted by the luminous layer, thereby increasing light extraction efficiency of the luminance layer.