Patent ID: 8901522
Filing Date: 2014-12-02
Classification: G03F,H05G

Abstract:
1. A chamber apparatus used with a laser apparatus and an external apparatus having an obscuration region, the chamber apparatus comprising: a chamber provided with at least one inlet through which a laser beam outputted from the laser apparatus enters the chamber; a target supply unit provided to the chamber for supplying a target material to a predetermined region inside the chamber; an electromagnet for generating a magnetic field by being supplied with an electric current, a central magnetic flux of the magnetic field being inclined with respect to a target track along which the target material outputted from the target supply unit travels; a power source configured to supply the electric current to the electromagnet so that the magnet field with a magnetic flux density B at the predetermined region is generated; a pair of charged particle collection units located in the central magnetic flux of the magnetic field while sandwiching the predetermined region, each of the charged particle collection units having an opening for collecting charged particles being generated when the target material is irradiated with the laser beam at the predetermined region, the charged particle travelling along the magnetic flux while diffusing within an angular range with a divergence angle θ given by an Expression θ=337.6e a collector mirror disposed inside the chamber for collecting extreme ultraviolet light emitted when the target material is irradiated with the laser beam inside the chamber, wherein at least a part of the pair of charged particle collection units is disposed within a range corresponding to the obscuration region over the collector mirror.