Patent ID: 11968767
Assignee: TRUMPF LASERSYSTEMS FOR SEMICONDUCTOR MANUFACTURING SE
Field: Medical technology (Instruments)
Classification: CPC H | IPC H

Claim 0:
1. An extreme ultraviolet (EUV) light source, comprising:
a providing device for providing a target material,
a prepulse laser source for emitting at least one prepulse laser beam at at least one prepulse wavelength,
a main pulse laser source for emitting a main pulse laser beam at a main pulse wavelength different than the at least one prepulse wavelength,
a prepulse beam guiding device for feeding the at least one prepulse laser beam from the prepulse laser source into a radiation generating chamber, and for focused irradiation of the target material within the radiation generating chamber with at least one prepulse of the at least one prepulse laser beam, and
a main pulse beam guiding device for feeding the main pulse laser beam from the main pulse laser source into the radiation generating chamber, and for focused irradiation of the target material within the radiation generating chamber with a main pulse of the main pulse laser beam,
the target material being configured to emit EUV radiation on account of the focused irradiation with the at least one prepulse and the focused irradiation with the main pulse,
wherein: the prepulse beam guiding device has at least one separation device configured to reflect disturbing radiation entering the prepulse beam guiding device from the radiation generating chamber in at least one wavelength range that does not comprise the at least one prepulse wavelength back into the radiation generating chamber, or into at least one beam trap.