Device for pivoting an optical component into a beam path of a system for semiconductor technology, and system for semiconductor technology

Abstract

The invention relates to a device (1) for pivoting an optical component (8) into a beam path of a system (30) for semiconductor technology, comprising - an arm (5, 5.1, 5.2) and the optical component (8) arranged on the arm, - at least one pivot joint (10.1, 10.2) via which the arm (5, 5.1, 5.2) is pivotally mounted in the device (1), wherein at least one pivot joint is in the form of a flexure bearing (10.1, 10.2). The invention also relates to a system (30) for semiconductor technology comprising a device (1) according to one of the embodiments described.

Description

[0001] Device for swiveling an optical component into a beam path of a semiconductor technology system and semiconductor technology system

[0002] The invention relates to a device for pivoting an optical component into a beam path of a semiconductor technology system and a semiconductor technology system, in particular a mask inspection system.

[0003] Semiconductor technology encompasses various processes for the fabrication of microstructured components, such as integrated circuits or LCDs (Liquid Crystal Displays). These processes include the fabrication and qualification of photolithographic masks, also known as photomasks or simply masks, the fabrication of substrates, particularly wafers, and the qualification of these substrates.

[0004] In the central process known as lithography or microlithography, the mask is illuminated by a lighting unit in a projection exposure system. The light passing through or reflected from the mask is projected by a projection lens onto a substrate (e.g., a wafer) coated with a photosensitive layer (photoresist) and positioned in the image plane of the projection lens. This transfers the structural elements of the mask onto the photosensitive coating of the substrate. The structure thus transferred to the substrate is then formed in an electrically conductive material in a further process step. A microstructured device typically comprises between 20 and 50 such layers, which interact to form a three-dimensional component. The process described above is therefore repeated several times.A single defect in a single layer during manufacturing can lead to the failure of the entire electronic component. Therefore, masks and wafers are inspected for potential defects using mask and wafer inspection systems. In the case of masks, certain defects can be repaired in a subsequent step. These systems utilize specially designed microscopes, which may also include a Bertrand module.

[0005] A Bertrand module, named after GB Amici and E. Bertrand, is a switchable lens system located between the objective lens (also known as the imaging optics) and the image plane. It incorporates a Bertrand element, either a lens or a mirror. In semiconductor technology, the Bertrand module is used to check the pupil illumination of the imaging optics. For this purpose, the Bertrand lens, or in the case of EUV semiconductor technology, the Bertrand mirror, is inserted or swung into the microscope's beam path, projecting the pupil plane of the imaging optics onto a sensor, such as a camera. This allows the position and illumination of the pupil plane of the imaging optics to be checked and, if necessary, corrected.

[0006] The Bertrand modules known from the prior art have the disadvantage that they are operated with friction-based actuators and / or kinematics, which means they can no longer meet the very high requirements of EUV semiconductor technology systems operating in a vacuum. Further disadvantages include insufficient positioning accuracy when the lens or mirror is pivoted and / or the Bertrand module's excessive size for the available installation space due to the kinematics required for positioning accuracy.

[0007] The object of the present invention is to provide a device which eliminates the disadvantages of the prior art explained above.

[0008] This problem is solved by a device having the features of independent claim 1. The dependent claims relate to advantageous further developments and variants of the invention.

[0009] An inventive device for pivoting an optical component into a beam path of a semiconductor technology system comprises a cantilever arm and the optical component arranged on the cantilever arm. The device further comprises at least one pivot joint by which the cantilever arm is pivotably mounted within the device. The device is characterized in that at least one pivot joint is designed as a solid-state joint. The solid-state joint enables the optical module, which can be designed, for example, as a Bertrand module, to be pivoted over a large angle of rotation with comparatively high accuracy and a small footprint. Furthermore, an elastically designed solid-state joint exhibits no hysteresis and no stick-slip effects, thereby achieving very high accuracy and reproducibility.

[0010] Unlike a pivot joint, a solid joint achieves rotational movement through the deformation, usually bending, of a typically elastic part of the joint. Film hinges are a typical example of a solid joint. Unlike typical pivot joints, solid joints do not involve sliding surfaces against each other, thus eliminating the need for lubrication and preventing particle abrasion caused by joint operation.

[0011] In particular, the rotation angle of the pivot joint during swiveling can be at least 27°, preferably at least 28°, and especially preferably at least 30°. The comparatively large rotation angle is due to the fact that, because of the high cleanliness requirements for protecting the optical elements in semiconductor technology systems, especially for EUV semiconductor technology, all components that could be contaminated by friction, outgassing of materials used (such as from kinematics and / or actuators), or other sources of contamination must be kept as far away as possible from the optical elements of the semiconductor technology systems. In particular, such components must not be arranged directly around the optical elements within an area designated as a mini-environment.At the same time, no component of the device in a parked position of the optical module, which is only swung into the beam path for measurement purposes, may restrict the beam path relevant for measuring the substrates, such as masks or wafers.

[0012] In a further embodiment of the invention, the solid-state joint can have at least two elastic sections. In particular, the at least two elastic sections can be connected via rigid connecting elements, resulting in a folded leaf spring whose individual elastic sections add up to a total length. This can, to a first approximation, correspond to a conventional leaf spring with a corresponding total length. If several elastic sections are connected to each other with rigid connecting elements designed as deflections, the deflections having an angle of 180°, the leaf spring can assume a meandering shape. Alternatively, any other conceivable folding of the leaf spring with the same total length can exhibit a comparable elastic effect.The folding of the leaf spring has the advantage that a comparatively large angle of rotation can be achieved in a comparatively compact installation space.

[0013] Furthermore, the total length of the elastic sub-areas can be at least 450 mm, preferably at least 460 mm and particularly preferably at least 480 mm.

[0014] In a further embodiment of the invention, the center of gravity of the boom arm of the device can be located on the axis of rotation of the at least one pivot joint, which advantageously eliminates the need to consider any displacement of the position of the optical module due to gravity when positioning the arm.

[0015] In particular, the boom arm can have interchangeable counterweights to shift its center of gravity, especially towards the axis of rotation of the swivel joint, after the device has been mounted. The boom arm can thus be adjusted so that the position relevant for the operation of the optical module on the z-axis parallel to the axis of rotation is maintained during rotation.

[0016] In a further embodiment of the invention, the device can include a fixing device for the boom arm in a measuring position. The fixing device can, on the one hand, stiffen the tilting stiffness of the axis of rotation of the at least one torsion spring in the direction of the longitudinal extension of the boom arm. On the other hand, it can also stiffen other degrees of freedom, in particular the translational degrees of freedom, in which the solid joint is comparatively flexible due to its design. Furthermore, the fixing device can ensure that the optical module is maintained in a predetermined position.

[0017] The fixing device can, for example, comprise a magnet, in particular an electromagnet. The magnet is positioned in an area where the boom arm is in a predefined measuring position. In the case of the electromagnet, it can be activated after the boom arm has been positioned and fix the boom arm in this position. The magnet must exert a predefined force, depending on the additional stiffening of the system required. In addition to amplifying the magnetic field generated by the magnet, the distance between the magnet and the boom arm can also be reduced to increase the magnetic force. This distance can be less than 1 mm, preferably less than 0.5 mm, and particularly preferably less than 0.2 mm.

[0018] Furthermore, the boom arm can have an anchor plate for fixing the boom arm to the magnet. The anchor plate is advantageously made of a magnetizable material, allowing the boom arm, which due to its weight is usually made of a non-magnetic material, particularly aluminum, to be fixed in place by the magnet.

[0019] Alternatively, other embodiments for the fixing device are conceivable, such as a mechanical clamping device with an adjustable stop against which the boom arm can be pressed and thus clamped, for example by an actuator.

[0020] In a further embodiment of the invention, the device can include an actuator for deflecting the boom arm, which can be configured to pivot the boom arm from a parked position to a measuring position and back. Furthermore, a force transmission element of the actuator with the pivot joint can be designed such that only tensile forces can be transmitted from the actuator to the boom arm. The actuator can thus pull the boom arm from the measuring position to a parked position, whereby the at least one pivot joint is pre-tensioned. When the boom arm pivots back into position, the restoring force of the pivot joint acts, so that no force is exerted by the actuator on the boom arm. This has the advantage that, when positioning the boom arm, which, as explained above, is defined by its fixation, there is no overdetermination due to a rigid force transmission element of the actuator.The force transmission element, which is soft in the direction of pressure, advantageously reduces the force acting by the actuator on the boom arm in the measuring position to a value that is irrelevant for positioning.

[0021] In a further embodiment of the invention, the at least one pivot joint can be arranged in a measuring position of the boom arm such that it exhibits no or virtually no deflection from its force-free zero deflection. The zero deflection is the deflection in which the leaf spring of the joint is stress-free, meaning no energy is stored in the spring in the form of a preload. Due to the stress-free leaf spring, no parasitic force can be exerted on the boom arm by the pivot joint. This has the advantage that deformations caused by parasitic forces do not affect the positioning of the boom arm, and that potential deformation of the optical module and the optical element held therein can be avoided. In combination with the connection of the actuator to the arm described above, the boom arm is held almost force-free in the measuring position, at least in its predetermined direction of rotation.

[0022] In a further embodiment of the invention, the device can comprise two mirror-image pivot joints with a common axis of rotation. The mirror-image design is necessary because a pivot joint rotated by 180° would result in one pivot joint being preloaded by the angle of rotation while the other is not. The resulting opposing restoring forces of the pivot joints would cancel each other out, and the restoring force for pivoting the boom arm, as described above, and in particular the nearly stress-free state of the pivot joints in the measuring position, would no longer be achieved.

[0023] In particular, the distance between the two mirror-image swivel joints can be at least 43 mm, preferably at least 45 mm, and especially preferably at least 50 mm.

[0024] An invention-based system for semiconductor technology comprises a device according to one of the embodiments described above.

[0025] In particular, the system can be configured as a mask inspection system, a mask repair system, a microscope, a projection exposure system, or a wafer inspection system.

[0026] Exemplary embodiments and variants of the invention are explained in more detail below with reference to the drawing. The drawing shows

[0027] Figure 1 is a schematic representation of a Bertrand module according to the invention.

[0028] Figure 2 shows a detail of the invention.

[0029] Figure 3a, b shows another detail of the invention,

[0030] Figure 4a, b shows a further detail of the invention, and

[0031] Figure 5 shows a schematic representation of a mask inspection system known from the prior art.

[0032] Figure 1 shows a schematic representation of a Bertrand module 1, which comprises a housing 2 with a box 3 and a boom arm 5.1, 5.2 projecting from the box 3. Reference numeral 5.1 represents the boom arm in a measuring position, and reference numeral 5.2 represents the boom arm in a parked position, which is shown with dashed lines in Figure 1. The box 3 is connected by a link 4, allowing the housing 2 to be positioned, for example, in a mask inspection system 31, as detailed in Figure 5. Reference numerals 6.1, 6.2 denote the longitudinal axes of the boom arm 5.1, 5.2. The boom arm 5.1, 5.2 is mounted in the housing 2 and is rotatable about a pivot axis 7. The rotation of the boom arm 5.1, 5.2 makes it possible to move the boom arm 5.1, 5.2 from the parked position to the measuring position, which is shown in Figure 1 with solid lines. The rotation angle α, by which the boom arm 5.1, 5.2 rotates2 can be pivoted from the measuring position to the parking position and vice versa, in the embodiment shown in Figure 1 lies in a range of 20° to 30°, whereby smaller and in particular larger rotation angles a can also be realized.

[0033] At the free end of the boom arm 5.1, 5.2, an optical element, designed as a Bertrand mirror 8 in the embodiment shown in Figure 1, is arranged and held by a mirror holder 9 connected to the boom arm 5.1, 5.2. The Bertrand mirror 8, pivoted into the beam path 43, 44 of the mask inspection system 31 (Figure 5), causes the pupil of the imaging optics 39 of the mask inspection system 31 to be imaged onto a sensor, such as a camera 32. This allows the pupil illumination to be checked and, if necessary, adjusted.

[0034] The boom arm 5.1 is connected via a force transmission element 15 (Figure 4) which is not visible in Figure 1 to an actuator 23 (Figure 4) which is also not visible, and which moves the boom arm 5.1 from the measuring position to the parking position of the boom arm 5.2 shown in dashed lines in Figure 1.

[0035] The housing 2 of the device 1, and thus all components of the device 1 that could potentially contribute to the contamination of the optical elements, are almost completely enclosed from the environment by the box 3 and arranged at a sufficient distance by the comparatively long boom arm 5.1 , 5.2, so that the risk of contamination of the optical elements of the imaging optics 39 (Figure 5) is reduced to a non-critical level.

[0036] Figure 2 shows a section of the device 1, designed as a Bertrand module, in which the cantilever arm 5.1 is shown in the measuring position. The box 3 shown in Figure 1 is not shown in Figure 2, so that a bearing 16 of the cantilever arm 5.1 is clearly visible. The bearing 16 comprises two torsion springs 10.1 and 10.2, which define the axis of rotation 7 of the cantilever arm 5.1. In the representation of Figure 2, only the torsion spring 10.1 is visible; the second torsion spring 10.2 is obscured by other components.

[0037] The torsion springs 10.1, 10.2 each have two spring shells 17.11, 17.12, 17.21, 17.22, each corresponding to one end of the torsion springs 10.1, 10.2, whereby only spring shell 17.11 is visible in Figure 1. Folded leaf springs 19.1, 19.2 are arranged between the spring shells, which are explained in detail in Figure 3a, whereby only the leaf spring 19.1 of the torsion spring 10.1 is visible in Figure 2.

[0038] The torsion springs 10.1, 10.2 are arranged in the device 1 such that they are pre-tensioned in the parked position of the measuring arm 5.2, while they have no or virtually no pre-tension in the measuring position of the boom arm 5.1. The restoring force of the torsion springs 10.1, 10.2 can therefore cause the boom arm 5.1, 5.2 to rotate from the parked position to the measuring position.

[0039] The torsion springs 10.1, 10.2 are connected on one side to a spring shell 17.11, 17.21 with the connection 4 and on the other side to the cantilever arm 5.1 with the spring shell 17.12, 17.22. In the embodiment shown in Figure 2, both connections are realized by a clamping connection 11.1, 11.2, 13.1, 13.2. The outer diameters of the spring shells 17.11, 17.12, 17.21, 17.22 are enclosed in clamping jaws 12.11, 12.12, 12.21, 12.22, 14.1, 14.2 of the clamping connections 11.1, 13.2.

[0040] 11.2, 13.1, 13.2 are clamped. The spring shells 17.11, 17.21 located further away from the longitudinal axis 6.1 of the boom arm 5.1 are connected to the connection 4, and the spring shells 17.12, 17.22 located closer to the longitudinal axis 6.1 of the boom arm 5.1 are connected to the boom arm 5.1. The torsion springs 10.1, 10.2 and their connection to the boom arm 5 are explained in detail in Figure 3a and Figure 3b.

[0041] During assembly, the springs 10.1 and 10.2 are pre-tensioned such that a minimal residual restoring force remains when the boom arm 5.1 reaches the measuring position. This is necessary to ensure that the measuring position is always reached, despite tolerances varying from device to device, due to the energy stored in the torsion springs 10.1 and 10.2. This minimal residual pre-tension is achieved by deflecting the springs 10.1 and 10.2 by 1° relative to the direction of the longitudinal axis 6.1 of the boom arm. During the assembly of the device 1, the spring shells 17.12, 17.22 (not visible) of the torsion springs 10.1, 10.2, which are directed towards the arm 5.1, are first aligned via positioning bores 18.11, 18.21 arranged in clamping jaws 14.1, 14.2 of the cantilever arm 5.1 with corresponding bores 18.12, 18.22 (Figure 3a) of the spring shells 17.12, 17.22 and clamped in this position. The pivot joint 10.1 is now connected to the boom arm 5.1 rotated by 1° relative to the direction of the longitudinal axis 6.1 of the boom arm 5.1.

[0042] During the subsequent assembly of the spring shells 17.11, 17.21 facing away from the arm 5.1 with the connection 4, these are pulled onto corresponding surfaces on the connection 4 via a flattening on the outer diameter of the spring shells 17.11, 17.21 when clamped with the clamping device 11.1, 11.2, whereby the spring shells 17.11, 17.21 no longer exhibit any deflection relative to the longitudinal axis 6.1 of the cantilever arm 5.1.

[0043] The spring shells 17.11, 17.21, 17.12, 17.22 are therefore mounted rotated by 1° relative to each other, so that in the measuring position of the boom arm 5.1 they are deflected by 1° or, in other words, the boom arm 5.1 would be deflected by 1° beyond the desired measuring position without a stop or a fixing device 25 explained in more detail in Figure 4b.

[0044] Figure 3a shows a torsion spring 10.1 with a spring shell 17.11 and a spring shell 17.12, which are connected to each other via a leaf spring 19.1 formed from several elastic sections 19.11. The torsion spring 10.1 is clamped to the connection 4 (Figure 2) via the spring shell 17.11, as explained in Figure 2, and clamped to the cantilever arm 5 via the spring shell 17.12.

[0045] In the embodiments shown in the figures, the leaf spring 19.1 is designed in a meandering shape; in other words, the individual elastic sections 19.11 alternate with connecting elements of the leaf spring 19.1 designed as rigid deflections 20.1, 20.2, whereby in Figure 3a, for the sake of clarity, only one elastic section 19.11 is designated with a reference numeral. By rotating the spring shells 17.11, 17.12 relative to each other, the deflections 20.1, 20.2 of the leaf spring 19.1 move towards each other on one side and away from each other on the other side, so that the leaf spring 19.1 has a fan shape in the deflected state. The distance between the deflections 20.1, 20.2 is selected such that they align themselves during a rotational deflection of the leaf spring 19.1.1. The torsion spring 10.1 does not touch the leaf spring 10.1 over the previously defined angular range, which in the embodiment illustrated in Figure 3a is a maximum of 30°, as this would be equivalent to a coil spring locking up. In all other degrees of freedom, the torsion spring 10.1 is stiffer compared to its torsional stiffness about the axis of rotation 7. In particular, the degree of freedom perpendicular to the longitudinal orientation of the leaf spring 19.1 is comparatively soft due to compression or stretching of the individual leaf spring sections 19.11. To prevent plastic deformation of the leaf spring 19.1, compression is limited by contact between the leaf spring sections 19.11 and the deflections 20.1, similar to the locking up of a coil spring, and stretching is limited by the spring shells 17.11 and 17.21 surrounding the leaf springs 19.1.The remaining degrees of rotational freedom about the axes perpendicular to the axis of rotation 7 are blocked by the clamping of the spaced-apart spring shells 17.11, 17.12, 17.21, 17.22, which prevent rotation due to the fixed clamping. Furthermore, the stiffness of the leaf spring 19.1 across its width and height is many times greater than its thickness.

[0046] Figure 3b shows a further detail of the invention, illustrating the clamping 13.1, 13.2 of the torsion springs 10.1, 10.2 on the boom arm 5. The torsion springs 10.1, 10.2 are positioned as mirror images of each other, so that both torsion springs 10.1, 10.2 are pre-tensioned in the parked position, i.e., they have a restoring force, and in the measuring position they have almost no restoring force, as explained above. The center of gravity 21 of the boom arm 5 is designed such that it lies on the common axis of rotation 7 of the pivot joints 10.1, 10.2. This has the advantage that the contribution to the tilting of the boom arm 5 due to gravity is very small or can even be zero. To compensate for manufacturing tolerances, which can lead to a displacement of the center of gravity 21 of the boom arm 5, compensating masses 22 are arranged on the left side in Figure 3b, which align the center of gravity 21 with the axis of rotation 7 of the rotary joints 10.1 , 10.2 can be used.

[0047] Figure 4a shows a further detail of the invention, with the boom arm 5.1 in the measuring position and the actuator 23 used to deflect the boom arm 5.1 from the measuring position to a park position. The actuator 23 is connected to the boom arm 5.1 via a force transmission element 15, which can only transmit a tensile force to the boom arm 5.1. The actuator 23 thus pulls the boom arm 5.1 against the spring stiffness of the torsion springs 10.1, 10.2 from the measuring position to the park position of the boom arm 5.1. During the reverse movement from the park position to the measuring position, the actuator 23 is moved, with the boom arm 5.1 being moved by the restoring force present in the torsion springs 10.1, 10.2. The force transmission element 15 ensures that the actuator 23 exerts no or only a negligible force on the boom arm 5 during the movement into the measuring position and, in particular, when reaching the measuring position.1. In the measuring position, the boom arm 5.1 is therefore almost free of parasitic forces, both from the actuator 23 and from the torsion springs 10.1 , 10.1.

[0048] The actuator 23 is connected via a line 24 to a control unit (not shown). The actuator 23 may have a sensor (not shown) for determining the travel distance, with which the position of the boom arm 5.1, 5.2 can be determined.

[0049] Figure 4b shows a further detail of the invention, depicting a section of the boom arm 5 with the bearing 16 and a fixing device 25 for securing the boom arm 5.1 in its measuring position. In the embodiment shown in Figure 4b, the fixing device 25 has an electromagnet 26 which pulls the boom arm 5.1 against the fixing device 25 when it reaches the measuring position. Due to the non-magnetic aluminum used for the boom arm 5.1, a magnetizable armature plate 27 is embedded in the boom arm 5.1 in the area of ​​the electromagnet 26. The distance between the electromagnet 26 and the armature plate 27 is only a few tenths of a millimeter, so that the movement of the mirror 8 (Figure 1) via the movement of the boom arm 5.1 can be neglected.Alternatively, the device 1 can be adjusted so that the position of the mirror 8 corresponds to the previously defined position when the electromagnet 26 is switched on. Fixing the boom arm 5.1 via the fixing device 25 results in greater stiffness of the bearing 16 in all six degrees of freedom, thereby advantageously reducing excitation of the boom arm 5.1 by parasitic mechanical vibrations, for example from other components of the overall system or from the environment, during the measurement. The positioning of the boom arm 5.1, 5.2 in the measuring position or parking position can be controlled, as explained above, either by a sensor (not shown) attached to the actuator 23 to control the travel distance of the actuator 23, or by an external sensor (not shown) that detects the rotational position of the boom arm 5.1. Alternatively, the measuring position of the boom arm 5.1 can be controlled by a sensor (not shown) attached to the actuator 23.1 can also be defined by an adjustable mechanical stop or a light barrier, which is set such that when the light barrier is triggered, the boom arm 5.1 is in the previously defined rotational position and is fixed in this position by the fixing device 25.

[0050] Figure 5 shows a schematic representation of a mask inspection system 31 for measuring an object 38, which may, for example, be designed as a photomask. The mask inspection system 31 comprises two light sources 34, 35, a first light source 34 being designed for measuring the object 38 in reflection and a second light source 35 for measuring the object 38 in transmitted light. The object 38 is arranged on a stage 37, which can position the object 38 laterally and vertically in the sub-nanometer range. The positional accuracy can be in a range of less than 100 nm, especially below 20 nm. In transmitted light measurement, the measuring light 44 from the illumination unit 47, which comprises the light source 35 and an illumination optic designed as a condenser 36, passes through the condenser 36, which generates a desired light distribution on the object 38.The pupil plane of the illumination optics 36 is designated by reference numeral 46 in the figure. The measuring light 44 passes through the object 38, which is subsequently imaged by an imaging optics 39 and a tube 41. The tube 41 magnifies the image of the object 38 and projects it onto a recording device 32 designed as a CCD camera. The semi-transparent mirror 40, arranged between the imaging optics 39 and the tube 41, is used for measurement in reflection and has no influence on measurement in transmitted light.

[0051] In a measurement by reflection, the measuring light 43 emitted by the light source 34 is reflected by the semi-transparent mirror 40 and then strikes the imaging optics 39. These focus the measuring light 43 onto the object 38, from which it is reflected. The measuring light 43 passes through the imaging optics 39 a second time and projects an image of the object 38 onto the tube 41 via the semi-transparent mirror 40. The tube 41 magnifies the image of the object 38 and projects it onto the recording device 32.

[0052] For checking and / or adjusting the imaging optics 39, an additional optical module 1, which, for example, comprises a so-called Bertrand optic designed as a Fresnel zone plate (mirror 8 - Figure 1), can optionally be swung into the beam path of the mask inspection system 31 between the receiving device 32 and the tube 41, whereby the device 1 described in Figures 1 to 4 can be used for this purpose. This results in the pupil 45 of the imaging optics 39 being imaged onto the receiving device 32 instead of the object 38.The pupil 45 encompasses the effects of all optical components involved in the imaging process, in particular the condenser 36 and / or the imaging optics 39, so that by adjusting the optical components 36, 39, especially the imaging optics 39, and / or other components affecting the pupil illumination, such as the illumination unit 47, a predetermined pupil illumination can be set in the pupil 45. In cases where the object 38 is designed as a photomask, it can have an aspect ratio between 1:1 and 1:3, preferably between 1:1 and 1:2, and particularly preferably 1:1 or 1:2. The photomask can be substantially rectangular. The photomask can preferably be 5 to 7 inches long and wide, and particularly preferably 6 inches long and wide. Alternatively, the photomask can be 5 to 7 inches long and 10 to 14 inches wide, preferably 6 inches long and 12 inches wide.

[0053] Reference symbol list

[0054] 1 Bertrand module

[0055] 2 cases

[0056] 3 Box

[0057] 4 Connection of mask inspection system

[0058] 5.5.1.5.2 Boom arm

[0059] 6.6.1 .6.2 Longitudinal axis of the boom arm

[0060] 7 Rotary axis cantilever arm

[0061] 8 mirrors

[0062] 9 Mirror bracket

[0063] 10.1.10.2 Torsion spring

[0064] 11.1.11.2 Clamping of the torsion spring connection

[0065] 12.11, 12.12, 12.21, 12.22 Clamping jaw / mounting connection

[0066] 13.1, 13.2 Clamping of torsion spring cantilever arm

[0067] 14.1, 14.2 Clamping jaw cantilever arm

[0068] 15 Power transmission element actuator boom arm

[0069] 16 Storage

[0070] 17.11, 17.12, 17.21, 17.22 Spring bowls

[0071] 18.11, 18.12, 18.21, 18.22 Positioning bore spring shell cantilever arm

[0072] 19.1, 19.2, 19.11 Leaf spring, sub-areas of leaf spring

[0073] 20.1, 20.2 Deflection leaf spring

[0074] 21 Focus on the boom arm

[0075] 22 counterweights, center of gravity, boom arm

[0076] 23 Actuator

[0077] 24 lines

[0078] 25 Fixing device

[0079] 26 Electromagnet

[0080] 27 Anchor plate

[0081] 31 Mask inspection system

[0082] 32 Recording device 34 Light source Incident light measurement

[0083] 35 Light source transmission measurement

[0084] 36 Lighting optics

[0085] 37 Object table

[0086] 38 objects

[0087] 39 Imaging optics

[0088] 40 mirrors

[0089] 41 Tube

[0090] 42 Control

[0091] 43 Measuring light incident light measurement

[0092] 44 Measuring light transmitted light measurement

[0093] 45 Check

[0094] 46 Pupil level

[0095] 47 Lighting unit a Swivel angle cantilever arm

Claims

Patent claims 1. Device (1) for pivoting an optical component (8) into a beam path of a system (30) for semiconductor technology, comprising - a cantilever arm (5, 5.1, 5.2) and the optical component (8) arranged on the cantilever arm, - at least one pivot joint (10.1 ,10.2) via which the boom arm (5, 5.1 ,5.2) is pivotably mounted in the device (1 ), characterized in that at least one pivot joint is designed as a solid body joint (10.1 ,10.2).

2. Device (1 ) according to claim 1 , characterized in that the rotation angle (a) of the pivot joint (10.1 ,10.2) when pivoting is at least 27°, preferably at least 28°, particularly preferably at least 30°.

3. Device (1 ) according to one of claims 1 or 2, characterized in that the solid body joint (10.1 ,10.2) has at least two elastic sub-areas (19.11 ).

4. Device (1 ) according to claim 3, characterized in that the at least two elastic sub-areas (19.11 ) are connected via rigid connecting elements (20.1 ,20.2).

5. Device (1 ) according to one of claims 3 or 4, characterized in that the sum of the elastic partial sections (19.11 ) is at least 450 mm, preferably at least 460 mm and particularly preferably at least 480 mm.

6. Device (1) according to one of the preceding claims, characterized in that the center of gravity (21 ) of the boom arm (5,5.1 ,5.2) of the device (1 ) lies on the axis of rotation (7) of the at least one pivot joint (10.1 ,10.2).

7. Device (1 ) according to one of the preceding claims, characterized in that the boom arm (5, 5.1 ,5.2) has interchangeable counterweights (22) for shifting the center of gravity (21 ) of the boom arm (5, 5.1 ,5.2) after assembly of the device (1).

8. Device (1) according to one of the preceding claims, characterized in that the device (1) has a fixing device (25) of the boom arm (5, 5.1 ,5.2) in a measuring position (5.2) of the boom arm (5).

9. Device (1 ) according to claim 8, characterized in that the fixing device (25) comprises a magnet, in particular an electromagnet.

10. Device (1 ) according to claim 9, characterized in that the boom arm (5,5.1 ,5.2) has an anchor plate (27) for fixing the boom arm (5, 5.1 ,5.2) with the magnet.

11. Device (1) according to one of the preceding claims, characterized in that the device (1) has an actuator (23) for deflecting the boom arm (5.5.1 .5.2) exhibits.

12. Device (1) according to claim 11, characterized in that a force transmission element (15) of the actuator (23) is connected to the rotary joint (10.1.10.2) is designed such that only tensile forces can be transferred from the actuator (23) to the boom arm (5, 5.1 ,5.2).

13. Device (1) according to one of the preceding claims, characterized in that the at least one pivot joint (10.1 ,10.2) in a measuring position of the boom arm (5.1 ) is arranged such that it has no or almost no deflection from its force-free zero deflection.

14. Device (1 ) according to one of the preceding claims, characterized in that the device (1) comprises two mirror-image rotary joints (10.1 ,10.2) with a common axis of rotation (7).

15. Device (1 ) according to claim 14, characterized in that the distance between the two mirror-image arranged pivot joints (10.1 ,10.2) is at least 43 mm, preferably at least 45 mm, particularly preferably at least 50 mm.

16. Device (1 ) according to one of the preceding claims, characterized in that the optical component (8) is designed as a Bertrand element, in particular as a Bertrand mirror.

17. Device (1 ) according to any one of the preceding claims 1 to 15, characterized in that the optical component (8) comprises an EUV mirror.

18. System (30) for semiconductor technology comprising a device (1) according to any one of claims 1 to 17.

19. System (30) according to claim 18, characterized in that the system is configured as a mask inspection system (30), as a mask repair system, as a microscope, as a projection exposure system or as a wafer inspection system.

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