Abstract: Disclosed are a semiconductor light emitting diode and a method for fabricating the same. The method comprises forming a crystalline nitride semiconductor layer on a substrate, forming an amorphous layer and a crystalline nitride semiconductor layer on the nitride semiconductor layer, forming an n-type nitride semiconductor layer on the crystalline nitride semiconductor layer, forming an active layer on the n-type nitride semiconductor layer, and forming a p-type nitride semiconductor layer on the active layer.

Abstract: Disclosed is a nail management device and circuit therefor which can utilize an ultrasonic wave to thereby remove artificial nails from user's nails, separate the foreign materials under the nails, and massage the nails and hands of the user. The device includes: a case; a vessel body installed within the case, to receive a predetermined kind of solution therein; an ultrasonic wave generator installed on the one side of the vessel body, to generate an ultrasonic wave for producing oscillation such as a minute wave motion in the solution received in the vessel body; and a keypad for determining oscillation strength of the solution and as to whether the oscillation is generated in accordance with manipulation of the user.