Patent ID: 8569723
Filing Date: 2013-10-29
Classification: G03F,H05G

Abstract:
1. An extreme ultraviolet light source apparatus generating an extreme ultraviolet light from plasma generated by irradiating a target with a laser light, the extreme ultraviolet light source apparatus comprising: a magnetic field generator configured for generating a magnetic field region at a plasma region in which the plasma is to be generated and converging charged particles including ion emitted from the plasma region using the magnetic field; a first charged particle collector (receiver) mounted at both sides of an axis of the magnetic field in the magnetic field region in order to collect (receive) the charged particles converged by the magnetic field; a target supply unit configured for supplying a target from a nozzle located outside a converging region in which the charged particles are to be converged inside the magnetic field region in an extreme ultraviolet light generating chamber; a target collector located at a position opposite to the nozzle, the target collector configured for collecting a residual target which does not contribute to generation of the plasma; and a second charged particle collector (receiver) configured for covering the nozzle and reducing collisions of unconverged charged articles with the nozzle.