Disclosed is an AC light emitting device having photonic crystal structures and a method of fabricating the same. Such compounds may be used to modulate ligand binding to GABAA receptors in vivo or in vitro, and are particularly useful in the treatment of a variety of central nervous system disorders in humans, domesticated companion animals and livestock animals. Thus, when photographing an image, an area to be photographed with high quality can be easily set in the image. The translation circuit distinguishes between the synchronization signals and generates a lock signal when the phase locked loop is locked onto a data signal, but does not when the hunting frequency passes through the target data signal frequency. \u2018DBB03\u2019 is also less prone to falling over than the parent type. During fabrication of semiconductor packages, after a post molding curing process, the vertically-stacked substrates can be easily separated by virtue of a gap being formed between exposed corner portions of the stacked substrates.