Patent ID: 7262830
Filing Date: 2007-08-28
Classification: G03F

Abstract:
1. An apparatus for exposing a wafer to light, said apparatus comprising: a light source unit having a light source for emitting light; a first cooling unit for cooling said light source unit, said first cooling unit having a gas flowpassage for a gas passing through said light source unit; a second cooling unit for cooling the gas, said second cooling unit having a first fluid flowpassage for a first fluid which is to be heat-exchanged with the gas in the gas flowpassage at a position downstream of said light source unit with respect to the flow of the gas; and a first temperature adjusting unit for adjusting the temperature of the first fluid said first temperature adjusting unit having a second fluid flowpassage for a second fluid which is to be heat-exchanged with the first fluid in the first fluid flowpassage at a position upstream of said cooling unit with respect to the flow of the first fluid.