Patent ID: 8399867
Filing Date: 2013-03-19
Classification: H05G

Abstract:
1. An extreme ultraviolet light source apparatus for generating extreme ultraviolet light by generating plasma of a target material within a chamber, said apparatus comprising: a target supply unit configured to supply the target material into said chamber; a collecting unit positioned to face said target supply unit and configured to collect at least a part of the target material; a first laser unit including a saturable absorber mirror and configured to irradiate the target material with a first laser beam; a second laser unit configured to irradiate the target material, which has been irradiated with the first laser beam, with a second laser beam to generate the plasma for radiating the extreme ultraviolet light; a laser dumper disposed in an optical path of the second laser beam and configured to absorb the second laser beam; collective optics configured to collect the extreme ultraviolet light from the plasma to output the extreme ultraviolet light; and a magnetic field generator configured to generate a magnetic field within said chamber.