Patent ID: 8461560
Filing Date: 2013-06-11
Classification: H05G

Abstract:
1. A system for generating EUV light from EUV light emitting plasma, said EUV light emitting plasma created from target droplets irradiated by laser pulses at an irradiation site in a laser produced plasma EUV system, comprising: at least one droplet position detector configured to detect positions of a target droplet as said target droplet is released toward said irradiation site; a target position detection feedback system coupled to receive data pertaining to said positions of said target droplet and to produce a trajectory data for said target droplet at least from said data pertaining to said positions of said target droplet; means for producing at least one of a temporal error signal and a spatial error signal from at least one of said data pertaining to said positions of said target droplet and said trajectory data; and means for modifying at least one of a timing, focus, and laser beam direction of said laser pulses responsive to at least one of said temporal error signal, said spatial error signal, and said trajectory data.