Patent ID: 6539042
Filing Date: 2003-03-25
Classification: G03F,H01S

Abstract:
An ultra pure purge system for a gas discharge laser comprising:A) a gas discharge laser comprising: 1) high voltage components mounted on a laser chamber and contained in a sealed high voltage chamber having a purged outlet port and a purge outlet port; 2) line narrowing components for narrowing bandwidth of laser beams produced by said laser contained in a sealed line narrowing chamber having a purge inlet port and a purge outlet port; 3) an output coupler contained in a sealed output coupler chamber having a purge inlet port and a purge outlet port; 4) a wavemeter contained in a sealed wave meter chamber having a purge inlet port and a purge outlet port B) a purge gas source; C) a component purge system comprising: 1) a purge gas filter for filtering purge gas from said purge gas source; 2) a distribution system comprising purge lines for directing filtered gas from said purge gas filter to the inlet port of each of said high voltage chamber, said line narrowing chamber, said output coupler chamber and said wavemeter chamber; 3) a flow monitor system compromising at least three flow monitors and a flow collection system comprising purge collection lines for directing gas exiting at the exit port of each of said line narrowing chamber, said output coupler chamber and said wavemeter chamber to one of said at least three flow monitors.