Catalyst-spreading device that uniformly spreads catalyst on a substrate in a device for producing carbon nanotubes

A catalyst-spreading device comprising:

• a mesh boat which stores catalyst to be spread on a substrate and includes sealed sides and a bottom having a mesh net;
• a transportation unit which transports the mesh boat on rails;
• and
• a vibration unit which vibrates the mesh boat to spread the catalyst on the substrate,
• wherein the vibration unit includes:
• a vibration generator that is connected to one end of the length direction of the mesh boat, and generates vibrations, and
• wherein the vibration generator comprises oil that acts as a damper against mesh boat movement;
• a spring that is connected to the other end, in the length direction, of the mesh boat and maintains the vibrations of the mesh boat and wherein the spring is disposed between the mesh boat and the transportation unit,
• a catalyst injector that injects catalyst in the mesh boat to be spread on the substrate;
• and
• a shield which prevents catalyst dropped from the mesh boat from going outside the substrate;
• wherein the vibration direction of the mesh boat is perpendicular to the transportation direction of the mesh boat.