Abstract: The present invention relates to a heteroaryl derivative, a stereoisomer thereof, a hydrate thereof, a solvate thereof, or a pharmaceutically acceptable salt thereof, a method for preparing the same, and a pharmaceutical composition for preventing or treating cancer comprising the same as an active ingredient. The heteroaryl derivative of the present invention exhibits high inhibitory activity against overexpressed HER2, and thus, a pharmaceutical composition containing the same as an active ingredient can be usefully used for preventing or treating HER-2 positive cancer.

Abstract: The present invention relates to an evaporator for vacuum thermal evaporation, and more particularly, to an evaporator having multi-layered conical slit nozzles, which can form a large-area uniform thin film and improve the efficiency of use of a material to be deposited. The evaporator includes a cylindrical crucible 110 with an open top face, and a nozzle unit 120 having a cylindrical body portion 121 assembled to the top face of the crucible 110, wherein the body portion 121 is provided with multi-layered conical slits 122 formed at an upper periphery of the body portion 121 while being bored through the body portion, and an evaporation tube 123 connected to the slits 122 while penetrating through a lower face of the body portion 121. The multi-layered conical slit nozzles provide a spouting distribution of a material to be deposited, which can increase the thickness uniformity of a deposited thin film and improve the efficiency of use of the material to be deposited.