Patent ID: 8686381

Claim:
A source-collector module for an extreme ultraviolet (EUV) lithography system, comprising: a laser that generates a pulsed laser beam; a fold mirror arranged along a source-collector module axis and configured to receive the laser beam and reflect the laser beam down the source-collector module axis in a first direction; a Sn vapor source comprising a vapor oven having an interior and configured to convert liquid Sn or solid Sn in the vapor oven interior to Sn vapor and provide the Sn vapor to a gap where the Sn vapor is irradiated by the pulsed laser beam, thereby creating a laser-produced plasma (LPP) that generates EUV radiation in a second direction that is generally opposite the first direction; and a grazing-incidence collector (GIC) mirror having an input end and an output end and arranged to receive the EUV radiation at the input end and focus the received EUV radiation at an intermediate focus adjacent the output end.