Abstract:
A radiation collector (141) comprising a plurality of reflective surfaces (400-405), wherein each of the plurality of reflective surfaces is coincident with part of one of a plurality of ellipsoids (40-45), wherein the plurality of ellipsoids have in common a first focus (12) and a second focus (16), each of the plurality of reflective surfaces coincident with a different one of the plurality of ellipsoids, wherein the plurality of reflective surfaces are configured to receive radiation originating from the first focus (12) and reflect the radiation to the second focus (16). An apparatus (820) shown in FIG. 11 comprising a cooling system (832) and a reflector (831), wherein the cooling system is configured to cool the reflector, the cooling system comprising: a porous structure (823) situated in thermal contact with the reflector, wherein the porous structure is configured to receive a coolant in a liquid phase state; a condenser (825) configured to receive coolant from (826) the porous structure in a vapour phase state, condense the coolant thereby causing the coolant to undergo a phase change to a liquid phase state and output the condensed coolant in the liquid phase state for entry (827) into the porous structure.
Abstract:
There is described a connection assembly (24) for a high-pressure liquid metal supply system used in an EUV light source comprising a monolithic block, wherein the monolithic block includes: at least one connection (21) for connecting to a reservoir (18,19) configured to hold liquid metal: interior passages (25) configured to fluidly connect the at least one connection with at least two liquid metal outlets/inlets (22, 23): at least two freeze valves (15,16,17) configured to block a passage by solidifying liquid metal therein. Also described is a liquid metal storage assembly including such a connection assembly, a lithography apparatus including such a liquid metal storage assembly or such a connection assembly, as well as the use of such assemblies or apparatus in a lithographic apparatus or method.
Abstract:
A radiation source for an EUV lithography apparatus is disclosed. The radiation source comprises a chamber comprising a plasma formation region, a radiation collector arranged in the chamber and configured to collect radiation emitted at the plasma formation region and to direct the collected radiation towards an intermediate focus region, and a radiation conduit disposed between the radiation collector and the intermediate focus region. The radiation conduit comprises at least one outlet on an inner surface of a wall of the radiation conduit for directing a protective gas flow, and at least one guide portion extending from the inner surface of the wall of the radiation conduit and configured to redirect the protective gas flow. Also disclosed is a method of reducing debris and/or vapor deposition in the radiation conduit by providing a protective gas flow to the at least one outlet of the radiation conduit.
Abstract:
A radiation source for an EUV lithography apparatus is disclosed. The radiation source comprises a chamber comprising a plasma formation region, a radiation collector arranged in the chamber and configured to collect radiation emitted at the plasma formation region and to direct the collected radiation towards an intermediate focus region, and a radiation conduit disposed between the radiation collector and the intermediate focus region. The radiation conduit comprises at least one outlet on an inner surface of a wall of the radiation conduit for directing a protective gas flow, and at least one guide portion extending from the inner surface of the wall of the radiation conduit and configured to redirect the protective gas flow. Also disclosed is a method of reducing debris and/or vapor deposition in the radiation conduit by providing a protective gas flow to the at least one outlet of the radiation conduit.
Abstract:
A radiation collector comprising a first collector segment comprising a plurality of grazing incidence reflector shells configured to direct radiation to converge in a first location at a distance from the radiation collector, a second collector segment comprising a plurality of grazing incidence reflector shells configured to direct radiation to converge in a second location at said distance from the radiation collector, wherein the first location and the second location are separated from one another.