Abstract:
The invention relates to a contamination prevention system (71) comprising a rotatable channel barrier (72), which is driven by means of a suitable bearing (73,74). The contamination prevention system (71) according to the invention is arranged with a cooling system (75) provided substantially in a vicinity of the bearing (73). The cooling system (75) may comprise conducts (75a) through which a suitable fluid coolant, notably gas, is provided. It is possible that the gas is supplied via a central channel (79a) provided in a shaft of the contamination prevention system. Additionally, a supplementary cooling system (76) may be provided arranged with suitable conducts (76a). Because this cooling system (76) is arranged on the periphery of the contamination prevention system (71), it may use water as a suitable coolant. The invention further relates to a lithographic projection apparatus, a radiation source and a method of manufacturing an integrated structure.
Abstract:
A contaminant trap apparatus (10) arranged in a path (R) of a radiation beam to trap contaminants emanating from a radiation source (50) configured to produce the radiation beam is disclosed. The contaminant trap (10) apparatus includes a rotor (10) having a plurality of channel forming elements (11) defining channels (ch) which are arranged substantially parallel to the direction of propagation of the radiation beam, the rotor (10) including electrically chargeable material and arranged to be electrically charged as a result of the operation of the radiation source (50); and a bearing (20) configured to rotatably hold the rotor (10) with respect to a rotor carrying structure (30), wherein the apparatus is configured to (i) control or redirect an electrical discharge (10) of the rotor (ED), or (ii) suppress an electrical discharge (ED) of the rotor (10), or (iii) both,(i) and (ii).
Abstract:
A radiation system (1) for generating a beam of radiation (2) that defines an optical axis (3) is provided. The radiation system (1) includes a plasma produced discharge source (4) for generating EUV radiation. The discharge source (4) includes a pair of electrodes (5) constructed and arranged to be provided with a voltage difference, and a system for producing a plasma between the pair of electrodes (5) so as to provide a discharge (7) in the plasma between the electrodes (5). The radiation system (1) also includes a debris catching shield (11) for catching debris (8) from the electrodes (5). The debris catching shield (11) is constructed and arranged to shield the electrodes (5) from a line of sight provided in a predetermined spherical angle relative the optical axis (3), and to provide an aperture (12) to a central area (10) between the electrodes (5) in the line of sight.
Abstract:
A lithographic apparatus includes an illumination system configured to condition a radiation beam substantially from a light emitting point. The illumination system includes a contaminant trapping system (CTS) . The trapping system includes a contaminant trap having a central zone (CZ) and a peripheral zone (PZ) . The trap includes a plurality of platelets (PF) that extend substantially outwards through the peripheral zone. The light emitting point (LEP) is in a plane with which the platelets coincide. Each of the platelets has a normal (N) with a component (Ctcz) directed towards the central zone.
Abstract:
A contamination prevention system is constructed and arranged to prevent material from propagating with radiation into a lithographic apparatus. The contamination prevention system includes a rotatable carrier provided with a plurality of generally radially outwardly extending blades. The blades are constructed and arranged to absorb or deflect the material. The system also includes a stationary shaft, and a bearing constructed and arranged to rotate the rotatable carrier and the blades around the shaft. The rotatable carrier is provided with a space for at least partially receiving a portion of the shaft.
Abstract:
A radiation system for generating a beam of radiation that defines an optical axis is provided. The radiation system includes a plasma produced discharge source for generating EUV radiation. The discharge source includes a pair of electrodes constructed and arranged to be provided with a voltage difference, and a system for producing a plasma between the pair of electrodes so as to provide a discharge in the plasma between the electrodes. The radiation system also includes a debris catching shield for catching debris from the electrodes. The debris catching shield is constructed and arranged to shield the electrodes from a line of sight provided in a predetermined spherical angle relative the optical axis, and to provide an aperture to a central area between the electrodes in the line of sight.
Abstract:
A contaminant trap apparatus arranged in a path of a radiation beam to trap contaminants emanating from a radiation source configured to produce the radiation beam is disclosed. The contaminant trap apparatus includes a rotor having a plurality of channel forming elements defining channels which are arranged substantially parallel to the direction of propagation of the radiation beam, the rotor including electrically chargeable material and arranged to be electrically charged as a result of the operation of the radiation source; and a bearing configured to rotatably hold the rotor with respect to a rotor carrying structure, wherein the apparatus is configured to (i) control or redirect an electrical discharge of the rotor, or (ii) suppress an electrical discharge of the rotor, or (iii) both (i) and (ii).
Abstract:
A rotatable contamination barrier (1) is disclosed. The barrier includes a plurality of closely packed blades (5) for trapping contaminant material coming from an EUV radiation source (2). The blades are oriented radially relative to a central rotation axis of the contamination barrier. The contamination barrier is segmented in an inner segment (7) and an outer segment (8) relative to the central rotation axis. Accordingly, higher revolution speeds may be attained without compromising the contamination barrier.
Abstract:
A rotatable contamination barrier (4) is disclosed that has a plurality of closely packed blades (5) configured to trap contaminant material coming from a radiation source (2). The blades are radially oriented relative to a central rotation axis (6) of the contamination barrier. The blades comprise a metal compound having crystals oriented generally radially relative to the central rotation axis.