WO2017194348A1 - Lageranordnung für eine lithographieanlage sowie lithographieanlage - Google Patents
Lageranordnung für eine lithographieanlage sowie lithographieanlage Download PDFInfo
- Publication number
- WO2017194348A1 WO2017194348A1 PCT/EP2017/060371 EP2017060371W WO2017194348A1 WO 2017194348 A1 WO2017194348 A1 WO 2017194348A1 EP 2017060371 W EP2017060371 W EP 2017060371W WO 2017194348 A1 WO2017194348 A1 WO 2017194348A1
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- WO
- WIPO (PCT)
- Prior art keywords
- leaf springs
- bearing
- rod
- actuator
- axis
- Prior art date
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70808—Construction details, e.g. housing, load-lock, seals or windows for passing light in or out of apparatus
- G03F7/70816—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/12—Pivotal connections incorporating flexible connections, e.g. leaf springs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70808—Construction details, e.g. housing, load-lock, seals or windows for passing light in or out of apparatus
- G03F7/70825—Mounting of individual elements, e.g. mounts, holders or supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/20—Optical, e.g. movable lenses or mirrors; Spectacles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/20—Optical, e.g. movable lenses or mirrors; Spectacles
- F16C2370/22—Polygon mirror
Definitions
- the present invention relates to a bearing assembly for a Lithographiean- lay and a lithographic system with such a bearing assembly.
- Microlithography is used to fabricate microstructured devices such as integrated circuits.
- the microlithography phie farming is performed with a lithography system, which has a loading ⁇ lighting system and a projection system.
- the image of an illuminated by the illumination system mask (reticle) is in this case be ⁇ -coated and disposed in the image plane of the projection system jemiessystems by means of the product was bonded to a photosensitive layer (photoresist) substrate (eg. As a silicon wafer) projected to the Mask structure on the lichtempfind ⁇ Liche coating of the substrate to transfer.
- a photosensitive layer photoresist
- the mirrors can z. B. on a support frame (English: force frame) and at least partially designed to be manipulated to ermögli ⁇ chen a movement of a respective mirror in up to six degrees of freedom and thus a highly accurate positioning of the mirror to each other, especially in the pm range ,
- a support frame English: force frame
- weight-force compensating devices based on permanent magnets (English: magnetic gravity compensators) are usually used, as described, for example, in DE 10 2011 088 735 A1.
- the compensation force generated by such sectionskraftkompensationsein- direction acts the weight of the mirror ent ⁇ against and corresponds essentially in magnitude.
- Lorentz actuators the movement of a respective mirror - in particular in the vertical direction - is actively controlled by so-called Lorentz actuators.
- a Lorentz actuator in each case comprises an energizable coil and spaced therefrom a permanent magnet. Together, these generate an adjustable magnetic force for controlling the movement of the respective Spie ⁇ gels.
- Lorentz actuators are described for example in DE 10 2011 004 607.
- an object of the present invention is to provide an improved bearing arrangement for a lithographic system and a verbes ⁇ serte lithography.
- a bearing assembly for a lithography apparatus having an optical element, a base and a bearing device.
- the optical element is movably mounted relative to the base.
- the bearing Rich ⁇ processing has at least a Torsionsentkopplungselement which reduces an over ⁇ transmission of torsional moments between the optical element and the base.
- the Torsionsentkopplungselement has at least two leaf springs, which each have opposite narrow sides.
- the Torsi ⁇ onsmomente act around an axis which is perpendicular to the narrow sides.
- the at least two leaf springs are angled to each other and are coupled to each other ⁇ art that a flow of force through the element Torsionsentkopplungs ⁇ flows simultaneously through both leaf springs.
- These further elements include in particular one or more bending decoupling elements and one or more rods (Engl .: pins).
- the bending decoupling elements are formed insbeson ⁇ particular as solid body joints.
- the torsional stress in the bearing elements of the bearing device could also be reduced overall by an extension of the bearing device.
- this would lead to an enlargement of the required construction space, which however is advantageously avoided with the torsion decoupling element described above.
- an extension of the storage facility would increase the mass of sondere a corresponding rod, conditioning, which in turn increases parasitic Dyna ⁇ miken.
- a respective one of the at least two leaf springs comprises four
- Wor ⁇ th has a respective one of at least two leaf springs in the form of a rectangu ⁇ gen plate.
- other forms of at least two Blattfe ⁇ countries conceivable.
- one or more narrow sides of a respective leaf spring can have a curved course.
- the torsion decoupling element is torsionally soft. Because the narrow sides have only a small area moment of inertia about the axis.
- the Torsionsentkopplungselement is rigid about two axes, which are both perpendicular to each other and perpendicular to the axis about which the Torsionsmomente act stand.
- Torsionsent ⁇ coupling element has only one degree of freedom, namely the Rota ⁇ tion decoupling, while the other two rotational degrees of freedom and the other three translational degrees of freedom are locked, that is ei ⁇ ne relative movement within the Torsionsentkopplungselements to one of the other does not take place on both rotational axes and along all three translational axes.
- the axis about which the torsional moments act is referred to herein as the first axis, the two other axes as the second and third axis.
- the above-mentioned rotation decoupling can basically be achieved by bending the at least two leaf springs (variant 1) or twisted (variant 2) if the movement takes place in the one degree of freedom of the torsion decoupling element.
- angled is herein meant the non-parallel.
- the two leaf springs are mutually perpendicular.
- “Vertical” as used herein preferably comprises (gene ⁇ rell), deviations by up to 20 °, preferably up to 5 °, and more preferably up to 2 °
- “Simultaneously” includes those embodiments of in which two leaf springs are arranged one behind the other, so that the force flow first through the ent ⁇ speaking first, and thereafter flows through the respective second leaf spring. For this leads precisely to the fact that in each case a bending softness to the jewei ⁇ ligen leaf springs results.
- Torsionsentkopplungselement is thus designed as a solid-body joint, there are advantages such as minimal friction losses, a very high positioning accuracy and good heat transmission. It is also possible for more than two leaf springs, for example 3 to 20 or 3 to 10 leaf springs, to be installed in the torsion decoupling element. Especially before ⁇ are Trains t> 4 leaf springs, especially 6 to 8 leaf springs provided which play as seen in cross-section together forming a star shape in ⁇ Kgs ⁇ NEN.
- the base is preferably designed as a support frame (English: force frame).
- the at least two leaf springs connect the same components of the bearing device with each other.
- the components may be - even exclusively - a first and a second component.
- the at least two leaf springs ⁇ hereinafter referred to as first and second leaf spring connecting the first and second components together, the connection JE because it takes place over narrow sides of the leaf springs.
- the first leaf spring is thus firmly connected on a first narrow side with the first component, and is fixedly connected at a second, the first narrow side opposite narrow side with the two ⁇ th component.
- the second leaf spring is fixedly connected at a first narrow side with the first component, and is fixedly connected at a second, the first narrow ⁇ side opposite narrow side with the second component.
- This embodiment makes it particularly easy to ensure that the flow of force through the torsional decoupling element flows simultaneously through both leaf springs.
- Simultaneously refers to the instant of transmission of one and the same torsional moment.
- the first and second leaf springs are mechanically connected in parallel with each other.
- the at least two leaf springs together form a cross shape when viewed in cross-section.
- This embodiment is also referred to as a cross spring joint.
- the at least two leaf springs Kgs ⁇ NEN thereby along said one axis after the other be located.
- the at least two leaf springs along the one axis may be arranged completely or partially overlapping.
- the at least two leaf springs can be fastened to one another along one axis and can also be formed integrally with one another.
- more than two leaf springs are vorgese ⁇ hen, which together seen in cross section form a star shape.
- the leaf springs can
- NEN for example m be arranged at an angle to each other, wherein
- N the number of leaf springs multiplied by 2.
- the at least two leaf springs are made of metal.
- the at least two leaf springs are produced in one piece with one another and / or with the first and / or second component.
- the Torsionsentkopplungselement on two hollow cylindrical sections At a respective hollow cylindrical Ab ⁇ cut a tongue may be formed, which protrudes into the respective other hohlzy ⁇ -lindrischen section.
- a respective tongue can be connected to a respective other gene hollow cylindrical portion on both of the at least two Blattfe ⁇ countries.
- form a hollow cylindrical portion with an associated tongue a first component in the above sense and the other hollow cylindrical portion with its associated tongue the second component in the above sense.
- a third leaf spring can be provided, which are arranged in the longitudinal direction centrally Zvi ⁇ rule of the first and second leaf spring and combines both a hohlzy ⁇ -cylindrical portion and the associated therewith tongue with the other hollow-cylindrical portion and the associated therewith tongue.
- the third leaf spring is perpendicular to the first and second tongue.
- the bearing arrangement has at least one actuator, which is adapted to actuate the optical element by means of the bearing device along the axis.
- the Torsionsentkopplungselement has a high rigidity. Accordingly, large forces can be exerted in one direction along the axis of the actuator on the optical element, which is particularly desired for dynamic considerations.
- the bearing device has at least one rod whose longitudinal central axis defines the axis. Forces are preferably before ⁇ - transmitted along the longitudinal central axis of the Staff bes by this - in particular exclusively.
- the rod can be connected by means of one or more Festkör ⁇ peri-joints with the optical element such that the force ⁇ transmission is ensured exclusively along the longitudinal central axis.
- the rod is connected to the optical element via a first bending decoupling element, wherein the first bending decoupling element has at least two leaf springs whose bending axes are perpendicular to one another and wherein a force flow through the first bending decoupling element successively the at least two leaf springs flows.
- the at least one rod is movable along the axis by means of the at least one actuator.
- the at least one rod at one end thereof at least a first bending ⁇ decoupling element. At its other end, the rod is coupled to the at least one actuator.
- the at least one rod at its other end by means of a second bending decoupling element is coupled to the at ⁇ least one actuator, wherein said second bending decoupling element has at least two leaf springs whose bending axes perpendicular to each other ste ⁇ hen and wherein a flow of force through the second bending decoupling element which flows through at least two leaf springs in succession.
- the rod can function as an extension with the effect that a small change in angle within the respective bending decoupling elements leads to a large movement of the optical element.
- the mechanical loss ⁇ performance can again be minimized in the bending decoupling elements. Accordingly, the thermal power dissipation is reduced, so that additional precautions ments for cooling of corresponding components in order to prevent unwanted thermal expansion can be dispensed with.
- the actuator is a weight force compensator, a Lorentz actuator and / or a reluctance actuator.
- the actuator may as a passive and / or active actuator being ⁇ forms to be.
- Passive means that the actuator is arranged to generate a quasi-static force ⁇ .
- Dynamic means that the actuator is arranged to generate a dynamic force is.
- the weight force compensator may have a plurality of permanent magnets, in particular three or five permanent magnets.
- the Permanentmag ⁇ items can be configured for example as a ring magnets.
- the weight ⁇ force compensator for example, have one or more permanent magnets which are attached to the base.
- the weight force compensator can have one or more permanent magnets, which are fastened to the bearing device , in particular to the at least one rod. The Wech ⁇ sel Koch between these permanent magnets generates the compensation ⁇ force.
- a “Lorentz actuator” is a coil to ver ⁇ stand, which interacts with a magnet.
- a reverse arrangement is possible.
- a “reluctance actuator” is such an actuator to be understood, wherein the actuation force is generated by reluctance force. This utilizes the effect that a system strives for a minimum magnetic resistance (reluctance).
- the bearing means several La ⁇ gerritten on which in each case comprises at least one rod, at least one actuator for actuating the rod along its longitudinal axis and at least one torsional decoupling element about the longitudinal axis.
- each of a plurality of La ⁇ gerritten may be configured of, for actuating the optical element in exactly one degree of freedom .
- the operation takes place in each case in the longitudinal direction of the bar.
- the plurality of storage units access in such a way on the optical element that in total a movement of the optical element is accomplished in two, three, four, five or six degrees of freedom.
- the six degrees of freedom to ⁇ take the three rotational as well as the three translatory degrees of freedom.
- the optical element is a mirror, a lens, a lamba plate or an optical grating.
- a lithography system in particular a DUV or EUV lithography apparatus, comprising at least a bearing assembly as described above ⁇ be written is provided.
- EUV is "extreme ultraviolet” and refers to a wavelength of the illuminating light between 0.1 and 30 nm.
- DUV stands for "deep ult ⁇ raviolet” and refers to a wavelength of the working light from 30 to 250 nm.
- Fig. 1A shows a schematic view of an EUV lithography system
- Fig. 1B is a schematic view of a DUV lithography apparatus
- FIG. 2 shows a bearing arrangement internally known to the Applicant
- FIG. Fig. 2A shows schematically in plan view an optical element of Fig. 2;
- FIG. 3 shows for a rod from FIG. 2 a diagram of the torsional stress in bending decoupling elements versus the diameter of the rod.
- Fig. 4 shows the rod of FIG. 2, the torsion stress in the lung Biegeentkopp ⁇ elements versus the length of the rod!
- Fig. 5 shows a bearing assembly according to a first embodiment of the invention
- FIG. 5A shows a bearing assembly according to a second embodiment of the invention!
- Fig. 6 shows in a section VI of Figure 5 a storage unit.
- FIG. 7 shows a part of the bearing unit from FIG. 6 in a perspective illustration.
- Fig. 8A is a perspective view of a leaf spring of Fig. 8;
- 10A shows a section X-X through a Torsionsentkopplungselement of FIG.
- Fig. 10B shows a section B-B of Fig. 10A
- Fig. IOC shows in a perspective view a leaf spring of Fig. 10A;
- Fig. 11 shows the view of Figure 10A, but according to another form of execution ⁇ .
- Fig. 12A shows a side view of a torsion decoupling element according to yet another embodiment
- Fig. 12B shows an axial view from the left of Fig. 12A;
- Fig. 12C shows an axial view from the right of Fig. 12A
- Fig. 12D is an exploded view of the torsional decoupling member of Fig. 12A
- Fig. 13 shows the view from Fig. 12D, however, according to yet another exporting ⁇ approximate shape.
- Fig. 1A is a schematic view of an EUV lithography apparatus 100A, which includes a beam shaping and illumination system 102 and a projection system 104 ⁇ .
- EUV stands for "extreme ultraviolet” (Engl .: extreme ultra violet, EUV) and denotes a wavelength of the working light between 0.1 and 30 nm.
- the beam-forming and illumination system 102 and the Gii ⁇ onssystem 104 are each in a not shown Vacuum housing vorgese ⁇ hen, each vacuum housing is evacuated using an evacuation ⁇ tion device, not shown ..
- the vacuum housings are surrounded by a machine room, not shown, in which the drive devices vorgese ⁇ for mechanical method or adjustment of the optical elements ⁇ are hen.
- the EUV lithography apparatus 100A has an EUV light source 106A.
- the EUV light source 106A a plasma source (or Syn ⁇ chrotron) can be provided for example, which radiation 108A in the EUV range (extremely ult ⁇ ravioletter range), ie in the wavelength gen Suite from 5 nm to 20 nm, from ⁇ sends.
- the EUV radiation 108A is collimated and the desired operating wavelength from the
- EUV radiation 108A filtered out.
- EUV light source 106A erzeug ⁇ te EUV radiation 108A has a relatively low transmissivity by air why the beam-guiding spaces in the radiation and illumination system 102 and in the projection system 104 are evacuated.
- the beam shaping and illumination system 102 shown in FIG. 1A has five mirrors 110, 112, 114, 116, 118.
- the EUV radiation 108A is applied to the photomask (Engl .: reticle) directed 120th
- the photomask 120 is likewise designed as a reflective optical element and can be arranged outside the systems 102, 104.
- the EUV radiation 108A can be directed onto the photomask 120 by means of a mirror 122.
- the photomask 120 has a structure which is reduced in size by the projection system 104 to a wafer 124 or the like.
- the projection system 104 (also referred to as a projection objective) has six mirrors M1-M6 for imaging the photomask 120 onto the wafer 124. As can ⁇ at individual mirrors Ml - M6 may be arranged symmetrically to the projection system 104 to the optical axis 126 of the projection system 104th It should be noted that the number of mirrors of the EUV lithography apparatus 100A is not limited to the number shown. There may also be more or fewer mirrors. Furthermore, the mirror usually before ⁇ the side curved at her for beam shaping.
- FIG. 1B shows a schematic view of a DUV lithography system 100B that includes a beamforming and illumination system 102 and a projection system 104.
- the beam shaping and DUV illumination system 102 and projection system 104 ⁇ stands for "deep ultraviolet” (Engl .: deep ultra violet DUV), and denotes a wavelength of the working light from 30 to 250 nm.
- the DUV lithography system 100B has a DUV light source 106B.
- a DUV light source 106B for example, an ArF excimer laser can be provided, which radiation 108B in the DUV range, for example, 193 nm emit ⁇ advantage.
- the beamforming and illumination system 102 shown in FIG. 1B directs the DUV radiation 108B onto a photomask 120.
- the photomask 120 is formed as a transmissive optical element and may be disposed outside of the systems 102, 104.
- the photomask 120 has a structure which is reduced by means of the projection system 104 to a wafer 124 or the like.
- the projection system 104 has a plurality of lenses 128 and / or mirrors 130 for imaging the photomask 120 onto the wafer 124.
- individual lenses 128 and / or mirrors 130 of the projection system 104 may be arranged symmetrically with respect to the optical axis 126 of the projection system 104.
- the number of lenses and mirrors of the DUV system 100B is not limited to the number shown. It is also possible to provide more or fewer lenses and / or mirrors. Furthermore, the mirrors are usually curved at their front for beam shaping.
- An air gap between the last lens 128 and the wafer 124 may be replaced by a liquid medium 132 having a refractive index> 1.
- the liquid medium may be, for example, high purity water.
- Such a structure is also referred to as immersion lithography and has an increased photolithographic resolution.
- Fig. 2 is a of the applicant shows a schematic side view of internal be ⁇ known bearing assembly 200.
- the bearing assembly 200 includes an optical element 202.
- the optical element 202 may be a mirror or one of the lenses in conjunction with the Figs. 1A and 1B have been described. In particular, in particular, it is one of the mirrors Ml - M6. Alternatively, the optical element 202 may also be an optical grating or a lambda plate.
- the bearing assembly 200 includes a base 204. In particular, it may be in the base 204 to a support frame (Engl .: force frame) of the Lithography ⁇ phiestrom 100A, 100B act.
- the base 204 may also consist of several kinematically uncoupled from each other in particular the support frame fauxset ⁇ zen.
- the bearing assembly 200 includes a bearing means 206 to ⁇ sammencode according to the embodiment of six storage units 208-1 through 208-6.
- the bearing units 208-1 to 208-6 are subdivided into three bearing units 208-1, 208-3, 208-5, via which a weight force compensation and active activation of the mirror 202 takes place, as well as three bearing units 208-2, 208-4 , 208-6, via which only an active control of the mirror 202 takes place.
- the bearing units 208-1 to 208-6 engage the mirror 202 in pairs via an adapter 210 assigned to a respective pair and shown in FIG. 2A.
- the adapters 210 lie, for example, on the vertices of an imaginary triangle in plan view (see FIG. 2A) on the mirror 202 from FIG.
- a force can be exerted on a respective bearing unit 208-1 to 208-6, which in each case in turn introduce the latter via a respective adapter 210 into the mirror 202 and thereby move it.
- the Be ⁇ movement of the mirror 202 in particular, for optical correction. Insbeson ⁇ particular this may optical correction include the correction of imaging errors on the wafer 124th
- the actuators ul, u3, u5 are preferably designed in each case as a combined weight-compensator / Lorentz actuator and generate in each case a quasi-automatic static force in the z-direction, ie in the vertical direction, which is opposite to the force acting on the mirror 202 gravity G.
- the sum of the quasi-static forces generated by the weight force compensators U1, U3, U5 corresponds in magnitude to the weight G, so that the mirror 202 is held in suspension.
- a respective actuator ul, u3, u5 may comprise a plurality of permanent magnets.
- the permanent magnets are configured to generate a suitable quasi ⁇ static holding force without the supply of external energy. Further, environmentally summarizes each actuator ul, u3, u5 one or more electrical coils for the generation ⁇ supply a dynamic force (Lorentz force or reluctance) for an active control of the mirror 202 in the z-direction.
- the actuators u2, u4, u6 can be designed, for example, as (pure) Lorentz actuators. They generate a force which is oriented at an angle to the z-direction. A corresponding angle ⁇ can, for example, Zvi ⁇ 's 20 and 70 °, preferably between 40 and 60 °.
- Lorentz actuators u2, u4, u6 an active control of the mirror 202 takes place.
- a respective bearing unit 208-1 to 208-6 can now in particular have the structure described below. This is explained below by way of example for the bearing unit 208-1, but applies correspondingly to the other bearing units 208-2 to 208-6.
- the bearing unit 208-1 includes a first bending decoupling element 212 wel ⁇ ches the one hand, on the other hand connected to a first rod 214 with the associated adapter 210 and is.
- the first rod 214 is in turn coupled to a second rod 218 by means of a second bending decoupling element 216.
- the actuator ul is connected to the second rod 218 and actuates it.
- the actuator ul is adapted to apply a force along the direction in which the rod extends, here identical to the z-direction, on this.
- the actuator ul may be composed of parts which on the one hand on the second rod 218 and on the other hand on the base 204 are ⁇ introduced , for example, from magnets and coils.
- the bending decoupling elements 212, 216 each represent an articulation in two degrees of freedom, namely a rotation about two axes which are perpendicular to the rod axis S of the respective rods 214, 218 and perpendicular zuei ⁇ Nander.
- brooding equation serves to describe the mobility of gears.
- This equation is in its general form: in which:
- F is the number of degrees of freedom
- n the number of transmission elements
- g is the number of joints
- the mirror 202 actually has no degree of freedom and is thus stored statically determined.
- reality shows that the mirror 202 is movable in all six degrees of freedom.
- This is attributed perform ⁇ that the solid joints are usually used for the bending decoupling elements 212, 216, ie have a compliance in the torsional direction about the axis of the rod S.
- Microlithographic processes for producing smaller and smaller structural ⁇ temperatures cause an increase of the numerical aperture of Giionssyste ⁇ men 104, as shown in Fig. 1A and 1B. Increasing the numerical aperture requires larger mirror surfaces and thus higher mirror masses.
- Fig. 4 shows the torsional stress o rs in the bending decoupling elements 212, 216 of Fig. 2 as a function of the rod length of the rod 214. It can be seen that the torsional stress in the bending decoupling members 212, 216 could be reduced by extending them. However, this leads disadvantageously to a Ver ⁇ magnification of the required space.
- Fig. 5 shows an embodiment of the bearing assembly 200, in which the torsional stress o 'rs in the storage device 206 and the respective bearing ⁇ units 208-1 through 208-6, and thus in the bending-vibration elements 212, 216 significantly compared to the solution according to Figure 2, in particular reduced to almost zero.
- This is achieved by inserting a torsion decoupling element 500 into a respective bearing unit 208-1 to 208-6.
- the torsional decoupling element 500 may be interposed between the first flexural decoupling element 212 and the mirror 202.
- the Torsionsentkopplungselement 500 may be connected on the one hand with an associated ⁇ adapter 210 and on the other hand with a third rod 502.
- the rod 502 is in turn connected to the first bending decoupling element 212.
- any other position of the torsion decoupling element 500 in the bearing unit 208-1 is also conceivable. Such a variant will be explained later in connection with FIG. 6.
- the torsional decoupling element 500 permits rotation about the rod axis S so that no or no relevant torsional loads are passed around the rod axis S to the base 204.
- the brooding equation for the bearing assembly 200 of FIG. 5 is as follows:
- the mirror 202 has the bearing assembly 200.
- Fig. 5A shows a variant of the bearing assembly 200, which differs from that shown in Fig. 5 that for each adapter 210 (see Fig. 2A) a zuslegili ⁇ che storage unit 208-7, 208-8, 208-9, respectively, together with an associated Actuator u7, u8 and u9 is provided.
- the bearing unit 208-7 holds the mirror 202 also be ⁇ movably relative to the base 204.
- the actuator u7 is adapted to a force at an angle ß on the mirror to apply the 202nd
- the angle ⁇ can be selected equal to the angle ⁇ .
- the units 208-2 and 208-7 mirror-symmetrically with respect to the rod axis S of the bearing unit 208-1 to be arranged.
- the actuators u7 to u9 can each be designed as Lorentz actuators. Furthermore, these can be configured for active control, ie for application dyna ⁇ mixer forces on the mirror 202nd In this case, it may be in the actuators ul, u3 and u5 pureConsequentlyskraftkompensatoren han ⁇ spindles, that is to say those actuators that are only adapted to perform a quasi ⁇ static holding force, which corresponds to the male weight of the mirror 202, but not for Be established generation of dynamic forces.
- each of the bearing units 208-1 to 208-9 has a torsion decoupling element 500.
- the mirror 202 or other optical element in other embodiments.
- the Torsionsentkopplungs sculpture can be integrally ⁇ arranged at arbitrary positions within the storage units 208-1 through 208-9500.
- FIG. 7 A possible embodiment of a part of the bearing arrangement 200 will be explained in greater detail below on the basis of a detail illustration VI from FIG. 5 shown in FIG. Further, reference is made to the perspective view of an off ⁇ section of FIG. 6, which is shown in Fig. 7, as well as to the enlarged details VIII and IX of Fig. 7 in Figs. 8 and 9 reference.
- the bearing unit 208-1 includes the first bending decoupling element 212 wel ⁇ ches is connected by means of the adapter 210 with the mirror 202 one hand.
- the first bending ⁇ decoupling element 212 is lung element connected with the Torsionsentkopp- 500th Opposite the first bending ⁇ decoupling element 212 is the Torsionsentkopplungselement verbun 500 with the rod 214 ⁇ .
- the rod 214 is again by means of the second bending decoupling element 216 connected via an adapter 600 with the actuator ul.
- the actuator ul includes a movable part 602 (this may be too ⁇ least partially identical to the rod 218 in Fig. 5) and a stationary part 604.
- the movable part 602 is connected to the adapter 600th
- the stationary part 604 is connected to the base 204.
- 604 more permanent magnets and / or coils can be integrated in the moving and in the sta tionary ⁇ part 602, so that the actuator may be formed as a passive and / or active actuator.
- all the actuators ul-u9 described above may additionally or alternatively have one or more reluctance actuators.
- the first bending decoupling element 212 can be seen in perspective in FIGS. 7 and 8. It includes two leaf springs 606, 608 which through a connecting portion ⁇ 610 are connected to each other.
- the leaf springs 606, 608 and the connecting portion 610 may be made as a one-piece component, in particular made of metal.
- Each of the leaf springs 606, 608 has a main extension plane E.
- the main extension planes E are perpendicular to each other.
- the first bending decoupling element 212 thus has a flexibility that allows the rod 214 to pivot about both the x and y axes.
- the x and y axes are perpendicular to each other and each perpendicular to the z axis.
- the respective bending axes of the leaf springs 606, 608 are denoted by R and T and may, as mentioned, coincide with the axes x and y.
- a respective leaf spring 606, 608 has such ⁇ illustrative of the leaf spring 606 with reference to FIG. 8A illustrated herein, two groovelie- constricting broad sides 800, 802 and four narrow sides 804, 806, 808 and 810 on.
- the opposite long narrow sides 804, 808 point in the direction of the bar axis S (non-guided state of the mirror 202).
- the short narrow Pages 806, 810 have the up satisfylie ⁇ constricting broadsides 800 in the direction of the bending axis R., 802 point in the direction of the bending axis T. This He ⁇ planations in relation to the first leaf spring 606 apply to the second leaf spring 608th
- a power flow K through the first flexure 212 flows successively through the two leaf springs 606, 608 as shown in FIG. That is, the leaf springs 606, 608 are mechanically connected in series. This causes the aforementioned Gelen ⁇ ktechnik to two mutually orthogonal axes, namely here the axes R and T, is provided.
- the first bending decoupling member 212 is disposed at the mirror-side end of the rod 214 and the mirror-side end of the torsion decoupling member 500, respectively.
- the second bending decoupling element 216 is disposed at the other end of the rod 214. This has a structure identical to the first bending joint 212, which is shown in FIG.
- first and second bending decoupling elements 212, 216 and the intermediate (long) rod 214 which preferably includes the torsion decoupling element 500 (also any other position of the
- Torsionsentkopplungselements 500 within the bearing 206 is mög ⁇ Lich), a movement of the mirror 202 can be accomplished, which leads even for large distances only small bends in the leaf springs 606, 608 in the first and second Biegeentkopplungselement 212, 216. This is particularly advantageous in view of the thus only small heat released there, which in turn could have a detrimental effect in the form of thermal expansions.
- FIGS. 10A which shows a section XX of Fig. 6, and Fig. 10B showing a sectional view BB of FIG. 10A
- the torsion decoupling element 500 comprises a first connecting section 1000 and a second connecting section 1002.
- the torsion decoupling element 500 comprises a first leaf spring 1004 and a second leaf spring 1006.
- the leaf spring 1004 is provided in ⁇ Fig. IOC illustrates in perspective view. This comprises opposite broad sides 1008 and 1010 and four narrow sides 1012, 1014, 1016, 1018. A pair of opposite narrow sides 1012, 1016 points in the direction of the bar axis S (in the undeflected state of the mirror 202).
- the first leaf spring 1004 is in particular integrally connected to the first connection section 1000 or the second connection section 1002.
- the second leaf ⁇ spring 1006 is constructed accordingly.
- 1006 are the Haupterstre- ckungsebenen E of the first and second leaf spring 1004 at an angle, in particular ⁇ sondere, as shown, perpendicular to each other.
- a force flow K (see FIG. 9) through the torsion decoupling element 500 must split into two partial flows Ki and K2 during the transition from the connecting sections 1000, 1002 to the leaf springs 1004, 1006. This then flow pa rallel ⁇ each other and at the same time by the leaf springs 1004, 1006 and UNITING ⁇ gen thereafter again, see Fig. 10B.
- the leaf springs 1004, 1006 are therefore connected in parallel mechanically. This results in that not one Blattfe ⁇ the 1004, 1006 can be bent without simultaneously bending the other leaf spring 1004, 1006 at the same time. Since these are arranged at an angle to each other, a corresponding bending moment sees a large area inertia component . As shown in FIG.
- this large area moment of inertia results from the leaf springs 1004, 1006 being cross-sectionally arranged. Furthermore, the leaf springs according to the present embodiment, along the rod axis S connected to each other, in particular integrally ver ⁇ connected. Thus, it follows that the Torsionsentkopplungselement 500 is rigid, ins ⁇ particular with respect to a bending moment about the axes R and T, see Fig. 8. Next is the Torsionsentkopplungselement 500 along the rod axis S - as well as the first and second Biegeentkopplungselement 212, 216- stiff.
- a torsional moment TM (s. Fig. 10B) about the rod axis S leads to distortion of the leaf springs 1004, 1006 (that is, the leaf springs 1004 are 1006 tordiert ), because they have only a very small torsional stiffness due to their small cross-section. Accordingly, no relevant torsional moment TM is passed through the leaf springs 1004, 1006.
- the leaf springs 606, 608, 1004 and 1006 may, for example, as shown, have a plate shape, in particular a rectangular plate shape. However, other geometries are conceivable. In particular, a curved course along the narrow sides 1014, 1018, in particular a part-circular course, is conceivable.
- Fig. 11 illustrates a torsional decoupling element 500 in cross-section, this being a variation from Fig. 10A. The difference is because ⁇ rin that a third and fourth leaf spring 1100 are provided 1102 which are connected at their respective opposite narrow sides 1012, 1016 (see. FIG. IOC) to the first and second connecting section 1000, 1002.
- FIG. 12A shows the Verbin ⁇ extension portions 1000, 1002 of the Torsionsentkopplungselements 500.
- the connecting portions 1000, 1002 are each configured as hollow-cylindrical portions.
- each a part-circular cross-section tongue 1200, 1202 is integrally formed.
- the leaf springs 1004 and 1006 integrally form a cross shape.
- the leaf springs 1004, 1006 connect both the two tongues 1200, 1202 and the hollow cylindrical connecting portions 1000, 1002 with each other.
- the leaf springs 1004, 1006 are connected at their long narrow sides 1014, 1018 each with egg ⁇ ner tongue 1200, 1202 and a hollow cylindrical connecting portion 1000, 1002.
- the connection is made to the Verbin ⁇ extension portions 1000, 1002 in the embodiment of FIGS. 10A and 10B over the short narrow sides 1012, 1016.
- leaf springs 1004, 1006 are bent (and not twisted, as in FIGS. 10A to 11), when the hollow cylindrical connecting portions 1000, 1002 are rotated about the axis S against each other.
- the hollow cylindrical connecting portions 1000, 1002 each have a cutout 1204, 1206 (s. Also FIG. 12B and 12C), which allows the tabs 1200, 1202 in each of the other hollow cylindrical Vietnamesesab ⁇ cut 1000, 1002 to slide into it.
- the exemplary embodiment according to FIG. 13 represents a variant of the torsion decoupling element 500 in comparison to FIGS. 12A to 12D.
- the leaf springs (see Figure 12D.) Extending 1004 1006 not parallel to each other and are not connected to each other along the B-axis Sta ⁇ S with each other, but are arranged behind one another along the axis S.
- the leaf spring 1004 connects the hollow cylinder -cylindrical connecting portion 1000 of the tongue 1202, the Verbin ⁇ dung on the tongue along a 1202 - takes place at ⁇ interpreted dashed line 1300 - better understanding sake.
- the leaf spring 1006 connects the hollow cylindrical connecting portion 1002 with the tongue 1200, the connection taking place along the dashed line 1302 on the tongue 1200.
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- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- General Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020187035227A KR102388340B1 (ko) | 2016-05-10 | 2017-05-02 | 리소그래피 시스템용 베어링 조립체, 및 리소그래피 시스템 |
US16/181,437 US10386732B2 (en) | 2016-05-10 | 2018-11-06 | Bearing assembly for a lithography system, and lithography system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102016208008.3A DE102016208008A1 (de) | 2016-05-10 | 2016-05-10 | Lageranordnung für eine Lithographieanlage sowie Lithographieanlage |
DE102016208008.3 | 2016-05-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/181,437 Continuation US10386732B2 (en) | 2016-05-10 | 2018-11-06 | Bearing assembly for a lithography system, and lithography system |
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WO2017194348A1 true WO2017194348A1 (de) | 2017-11-16 |
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PCT/EP2017/060371 WO2017194348A1 (de) | 2016-05-10 | 2017-05-02 | Lageranordnung für eine lithographieanlage sowie lithographieanlage |
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Country | Link |
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US (1) | US10386732B2 (de) |
KR (1) | KR102388340B1 (de) |
DE (1) | DE102016208008A1 (de) |
WO (1) | WO2017194348A1 (de) |
Families Citing this family (6)
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ES2910835T3 (es) * | 2019-08-02 | 2022-05-13 | Sener Aeroespacial S A | Pivote flexible para aplicaciones espaciales |
DE102020205306A1 (de) * | 2020-04-27 | 2021-10-28 | Carl Zeiss Smt Gmbh | Baugruppe, insbesondere in einer mikrolithographischen Projektionsbelichtungsanlage |
EP3961306A3 (de) * | 2020-06-29 | 2022-03-16 | Carl Zeiss SMT GmbH | Kompensation von kriecheffekten in einer abbildungseinrichtung |
EP3964893A1 (de) | 2020-06-29 | 2022-03-09 | Carl Zeiss SMT GmbH | Kompensation von kriecheffekten in einer abbildungseinrichtung |
DE102021205808A1 (de) | 2020-06-29 | 2021-12-30 | Carl Zeiss Smt Gmbh | Kompensation von kriecheffekten in einer abbildunsgseinrichtung |
EP3961305A3 (de) * | 2020-06-29 | 2022-03-09 | Carl Zeiss SMT GmbH | Kompensation von kriecheffekten in einer abbildungseinrichtung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090040638A1 (en) * | 2004-10-27 | 2009-02-12 | Carl Zeiss Smt Ag | Six degree of freedom (dof) actuator reaction mass |
DE102011004607A1 (de) | 2011-02-23 | 2012-01-12 | Carl Zeiss Smt Gmbh | Vorrichtung zur Gewichtskraftkompensation eines optischen Bauteils, Aktuator und Lithographievorrichtung |
DE102011088735A1 (de) | 2010-12-20 | 2012-06-21 | Carl Zeiss Smt Gmbh | Anordnung zur Halterung eines optischen Elementes, insbesondere in einer EUV-Projektionsbelichtungsanlage |
DE102011004299A1 (de) * | 2011-02-17 | 2012-08-23 | Carl Zeiss Smt Gmbh | Anordnung zur Halterung eines optischen Elementes, insbesondere in einer EUV-Projektionsbelichtungsanlage |
DE102012221831A1 (de) * | 2012-11-29 | 2014-06-05 | Carl Zeiss Smt Gmbh | Anordnung zur Aktuierung wenigstens eines optischen Elementes in einem optischen System |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG108317A1 (en) * | 2002-06-07 | 2005-01-28 | Asml Netherlands Bv | Lithographic apparatus and device manufacturing method |
JP6091434B2 (ja) * | 2011-02-17 | 2017-03-08 | カール・ツァイス・エスエムティー・ゲーエムベーハー | 光学マウント及びeuv露光装置 |
JP5762185B2 (ja) * | 2011-07-12 | 2015-08-12 | 株式会社新川 | ダイボンディング装置 |
KR20130004041U (ko) * | 2011-12-26 | 2013-07-04 | 이청우 | 장신구용 체결구 |
-
2016
- 2016-05-10 DE DE102016208008.3A patent/DE102016208008A1/de not_active Withdrawn
-
2017
- 2017-05-02 KR KR1020187035227A patent/KR102388340B1/ko active IP Right Grant
- 2017-05-02 WO PCT/EP2017/060371 patent/WO2017194348A1/de active Application Filing
-
2018
- 2018-11-06 US US16/181,437 patent/US10386732B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090040638A1 (en) * | 2004-10-27 | 2009-02-12 | Carl Zeiss Smt Ag | Six degree of freedom (dof) actuator reaction mass |
DE102011088735A1 (de) | 2010-12-20 | 2012-06-21 | Carl Zeiss Smt Gmbh | Anordnung zur Halterung eines optischen Elementes, insbesondere in einer EUV-Projektionsbelichtungsanlage |
DE102011004299A1 (de) * | 2011-02-17 | 2012-08-23 | Carl Zeiss Smt Gmbh | Anordnung zur Halterung eines optischen Elementes, insbesondere in einer EUV-Projektionsbelichtungsanlage |
DE102011004607A1 (de) | 2011-02-23 | 2012-01-12 | Carl Zeiss Smt Gmbh | Vorrichtung zur Gewichtskraftkompensation eines optischen Bauteils, Aktuator und Lithographievorrichtung |
DE102012221831A1 (de) * | 2012-11-29 | 2014-06-05 | Carl Zeiss Smt Gmbh | Anordnung zur Aktuierung wenigstens eines optischen Elementes in einem optischen System |
Also Published As
Publication number | Publication date |
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DE102016208008A1 (de) | 2017-11-16 |
KR102388340B1 (ko) | 2022-04-19 |
US10386732B2 (en) | 2019-08-20 |
US20190079417A1 (en) | 2019-03-14 |
KR20190005925A (ko) | 2019-01-16 |
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