EXTREME ULTRAVIOLET LIGHT SOURCE APPARATUS

摘要

An extreme ultraviolet light source apparatus in which a target material is irradiated with a laser beam and turned into plasma and extreme ultraviolet light is emitted from the plasma may include: a chamber in which the extreme ultraviolet light is generated; an electromagnetic field generation unit for generating at least one of an electric field and a magnetic field inside the chamber; and a cleaning unit for charging and separating debris adhered to an optical element inside the chamber.