Abstract:
A radiation source having a fuel stream generator (110) that generates and directs a fuel stream (102) along a trajectory towards a plasma formation location (104). A pre-pulse laser radiation assembly directs a first beam of laser radiation (100) at the fuel stream at the plasma formation location to generate a modified fuel target (106). A main pulse laser radiation assembly directs a second beam of laser radiation (108) at the modified fuel target at the plasma formation location to generate a radiation generating plasma (117). A collector (122) collects the radiation and directs it along an optical axis (105) of the radiation source. The first beam of laser radiation being directed toward the fuel stream substantially along the optical axis.
Abstract:
Die Erfindung betrifft ein Beleuchtungssystem für Wellenlängen ≤ 193 nm, wobei das Beleuchtungssystem eine Lichtquelle umfasst, die in einer Ebene eine vorbestimmte Ausleuchtung zur Verfügung stellt und a) eine erste optische Komponente mit ersten Rasterelementen, wobei die ersten Rasterelemente auf einem Trägerelement angeordnet sind und die erste optische Komponente in oder nahe der Ebene, in der die Ausleuchtung zur Verfügung gestellt wird, angeordnet ist. Die Erfindung ist dadurch gekennzeichnet, dass i) auf dem Trägerelement der ersten optischen Komponente mindestens ein Sensor zur Detektion von auf das Trägerelement auftreffendem Licht angeordnet ist. ii) Spiegel des Beleuchtungssystems durch Auswertung der Sensorsignale so gestellt werden, dass die Lage und Stärke der Beleuctung konstant gehalten werden.
Abstract:
A lithographic apparatus include an optical element that includes an oriented carbon nanotube sheet. The optical element has an element thickness in the range of about 20-500 nm and has a transmission for EUV radiation having a wavelength in the range of about 1-20 nm of at least about 20% under perpendicular irradiation with the EUV radiation. The oriented carbon nanotube sheet may be used per se as optical element, and may be designed to reduce debris and/or improve the ratio of EUV/non-desired radiation. The sheet, due to its strength, does not necessarily need a support. The optical element of the invention may be unsupported.
Abstract:
A lithographic apparatus for patterning a beam of radiation and projecting it onto a substrate, comprising at least two spectral purity filters configured to reduce the intensity of radiation in the beam of radiation in at least one undesirable range of radiation wavelength, wherein the two spectral purity filters are provided with different radiation filtering structures from each other.
Abstract:
A radiation source generates extreme ultraviolet radiation for a lithographic apparatus as a chamber that is provided with a low pressure hydrogen environment. A trace amount of a protective compound, e.g., H 2 O, H 2 O 2 , O 2 , NH 3 or NO x , is provided to the chamber to assist in maintaining a protective oxide film on metal, e.g., titanium, components in the chamber.
Abstract:
A lithographic apparatus include an optical element that includes an oriented carbon nanotube sheet. The optical element has an element thickness in the range of about 20-500 nm and has a transmission for EUV radiation having a wavelength in the range of about 1-20 nm of at least about 20% under perpendicular irradiation with the EUV radiation. The oriented carbon nanotube sheet may be used per se as optical element, and may be designed to reduce debris and/or improve the ratio of EUV/non-desired radiation. The sheet, due to its strength, does not necessarily need a support. The optical element of the invention may be unsupported.