Patent ID: 8575575
Filing Date: 2013-11-05
Classification: G03F,G21K,H05G

Abstract:
1. An extreme ultraviolet light chamber comprising: a collector mirror having a focus within an irradiation region; a cooling system coupled to a backside of the collector mirror operative to maintain a reflective surface of the collector mirror to less about 50 degrees C; a target material dispenser system containing a quantity of a tin containing target material; a buffer gas source coupled to the extreme ultraviolet light chamber; and a plurality of baffles located between the collector mirror and an output of the extreme ultraviolet light chamber, wherein at least a first portion of each one of the plurality of baffles is substantially aligned to the irradiation region and wherein at least a second portion of at least one of the plurality of baffles is substantially not aligned to the irradiation region.