Method for extending the gas lifetime of excimer lasers

Details Method for extending the gas lifetime of excimer lasers Method for extending the gas lifetime of excimer lasers

H - Electricity

01

S

H01S 3/036 (2006.01) H01S 3/225 (2006.01)

Patent

CA 2082405

A method for extending the gas lifetime of an excimer laser by removing CF4 impurity, which comprises: a) reacting CF4, an undesirable impurity which forms and is contained in the lasing gases, with an amount of an oxidizing gas additive effective to produce one or more compounds which are condensible with refrigeration means, without reducing laser output below a predetermined acceptable level; and b) condensing said one or more compounds produced in step a) with refrigeration means, substantially without condensing said one or more rare gases therewith, thereby removing said CF4 impurity from said excimer laser and extending the gas lifetime of the laser.

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