Patent ID: 7191599
Filing Date: 2007-03-20
Classification: F25B,F25D,G03F,H01L

Abstract:
1. An exposure apparatus for exposing a pattern onto an object, said exposure apparatus comprising: an optical element provided in a vacuum atmosphere; and a cooling apparatus for cooling the optical element using a radiation cooling, wherein said cooling apparatus comprises: a board arranged apart from the optical element, said board having a temperature that is smaller than a temperature of the optical element; a Peltier element having a heat absorption surface and a heat radiation surface, and connected to the board through the heat absorption surface; a radiation block connected to said Peltier element through the heat radiation surface, said radiation block having a channel to flow a coolant for cooling the heat radiation surface and being placed in a vacuum atmosphere; and a controller for controlling temperature of said board by changing voltage applied to said Peltier element; wherein said cooling apparatus cools said optical element by controlling the temperature of said board and maintains a temperature of the coolant to a predetermined temperature.