Abstract: The present invention relates to a naphthalimide sulfonate derivative, and a photoacid generator and a photoresist composition each comprising same and, more specifically, to a naphthalimide sulfonate derivative compound, and a photoacid generator and a photoresist composition each comprising same, wherein the compound has excellent absorbance for light of i-line (365 nm) wavelength, is greatly easy to prepare into a polymerizable composition due to very high solubility in an organic solvent, has good thermal stability, and shows a favorable acid generation rate.

Abstract: A multilayer ceramic capacitor includes a ceramic body having a dielectric layer, a plurality of internal electrodes disposed in the ceramic body, and a first side margin portion and a second side margin portion arranged on end portions of the internal electrodes exposed through respective opposing surfaces of the ceramic body. The ceramic body includes an active portion having the plurality of internal electrodes arranged to overlap each other with the dielectric layer interposed therebetween to form capacitance, and cover portions disposed above an uppermost and below a lowermost internal electrode of the active portion. The first and second side margin portions include tin (Sn), and a content of Sn included in the first and second side margin portions is greater than a content of Sn included in the dielectric layer of the active portion.

Abstract: Disclosed are an unmanned aerial vehicle, a charging station, and an automatic charging system for an unmanned aerial vehicle including the same. The unmanned aerial vehicle includes: a main body which includes a plurality of rotors, and is capable of flying and vertical taking off and landing by the rotors; a battery which is mounted in the main body for supplying power and is chargeable; a landing gear which includes a first charging terminal and a second charging terminal having different polarities and electrically connected to the battery, and is provided at a lower part of the main body; and a controller configured to control the main body.

Abstract: Disclosed are an unmanned aerial vehicle, a charging station, and an automatic charging system for an unmanned aerial vehicle including the same. The unmanned aerial vehicle includes: a main body which includes a plurality of rotors, and is capable of flying and vertical taking off and landing by the rotors; a battery which is mounted in the main body for supplying power and is chargeable; a landing gear which includes a first charging terminal and a second charging terminal having different polarities and electrically connected to the battery, and is provided at a lower part of the main body; and a controller configured to control the main body.