Patent ID: 6566668
Filing Date: 2003-05-20
Classification: B82Y,G03F,H05G,H05H

Abstract:
A high energy photon source for producing an extreme ultraviolet light beam defining a beam path said source comprising:A. a vacuum chamber, B. at least two electrodes mounted coaxially within said vacuum chamber and defining an electrical discharge region and arranged to create high frequency plasma pinches at a pinch site upon electrical discharge, C. a working gas comprising an active gas and a buffer gas, said buffer gas being a noble gas, and said active gas being chosen to provide light at least one spectral line, D. an active gas supply system for supplying the active gas to said discharge region, E. a pulse power system comprising a charging capacitor and a magnetic compression circuit said magnetic compression circuit comprising a pulse transformer for providing electrical pulses and voltages high enough to create electrical discharge between said at least one pair of electrode, F. a collector-director unit comprising at least two ellipsoidal mirror units arranged in tandem along the beam path to collect EUV beams from said pinch site and direct them along a predetermined path, and G. a debris collector mounted near said pinch site and comprising narrow passageways aligned with EUV beams emanating from said pinch site and directed toward said collector-director.