Patent ID: 7449069
Filing Date: 2008-11-11
Classification: C03C,G02F,H01L

Abstract:
1. A slit coater comprising: a table on which an object to be processed is mounted; a slit nozzle unit configured to apply a coating solution onto a surface of the object; and a coating solution supply apparatus including a storage tank configured to store the coating solution, a pump that supplies the coating solution stored in the storage tank to the slit nozzle unit through a first valve, a sealed buffer tank in fluid communication with the pump and the storage tank, a second valve placed between the buffer tank and the slit nozzle unit, a drain placed between the second valve and the buffer tank and a third valve placed between the drain and the buffer tank, wherein the supply apparatus is configured to substantially uniformly maintain pump pressure and to remove air bubbles from the coating solution and wherein air bubbles are removed through the drain in a state that the second valve or the third valve is opened and air is injected into the storage tank.