WO2019174996A1 - Strahlformungs- und beleuchtungssystem für eine lithographieanlage, lithographieanlage und verfahren - Google Patents
Strahlformungs- und beleuchtungssystem für eine lithographieanlage, lithographieanlage und verfahren Download PDFInfo
- Publication number
- WO2019174996A1 WO2019174996A1 PCT/EP2019/055594 EP2019055594W WO2019174996A1 WO 2019174996 A1 WO2019174996 A1 WO 2019174996A1 EP 2019055594 W EP2019055594 W EP 2019055594W WO 2019174996 A1 WO2019174996 A1 WO 2019174996A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical element
- optical
- illumination system
- pupil
- beam shaping
- Prior art date
Links
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
- G03F7/70058—Mask illumination systems
- G03F7/70141—Illumination system adjustment, e.g. adjustments during exposure or alignment during assembly of illumination system
-
- 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
- G03F7/70008—Production of exposure light, i.e. light sources
- G03F7/70033—Production of exposure light, i.e. light sources by plasma extreme ultraviolet [EUV] sources
-
- 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
- G03F7/7085—Detection arrangement, e.g. detectors of apparatus alignment possibly mounted on wafers, exposure dose, photo-cleaning flux, stray light, thermal load
-
- 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
- G03F7/70858—Environment aspects, e.g. pressure of beam-path gas, temperature
- G03F7/70883—Environment aspects, e.g. pressure of beam-path gas, temperature of optical system
- G03F7/70891—Temperature
Definitions
- the present invention relates to a Strahlformungs- and illumination system for a lithography system, a lithography system with such a beam shaping and illumination system and a method for adjusting egg nes such beam forming and illumination system.
- Microlithography is used to fabricate microstructured devices such as integrated circuits.
- the microlithography process is carried out with a lithography system which has a lighting system and a projection system.
- the image of a mask (reticle) illuminated by means of the illumination system is hereby projected onto a photosensitive layer (photoresist) coated on the image plane of the projection system, such as a silicon wafer, to project the mask pattern onto the photosensitive coating of the substrate Transfer substrate.
- EUV lithography systems are currently being developed which use light having a wavelength in the range from 0.1 nm to 30 nm, in particular 13.5 nm.
- reflective optics ie mirrors
- hitherto - breaking optics that is, lenses.
- tin can pass from an EUV light source operating with a tin plasma into the lighting system. This can lead to a degradation of the optics.
- the replacement of individual optics should advantageously without a removal and installation of the entire lighting system and preferably at the site the EUV lithography system and with as little downtime as possible. After replacement, adjustment of the optics may be required to achieve optimal field position and pupil position for the exposure mode. Furthermore, it may also be advantageous to adjust the optics already during a heating phase of the illumination system in order to achieve an optimal field position and pupil position even during the heating phase. That is, it should advantageously already during the heating phase of the exposure mode can be started to achieve the lowest possible downtime.
- DE 10 2016 203 990 A1 describes a method for producing a lighting system for an EUV lithography system.
- the method comprises adjusting a position of mirror modules of an illumination system of the EUV lithography system.
- the mirror modules are adjusted on the basis of measured values from a mobile measuring system.
- an object of the present invention is to provide an improved beam shaping and illumination system for a Lithogra phiestrom.
- the beamforming and illumination system comprises an optical element and an adjustment device, which is adapted to measure a field position and / or a pupil position of the beamforming and illumination system during a heating phase of the beamforming and illumination system and in dependence on the measured field position and / or Pu pillenposition to adjust an orientation and / or position of the optical element to hold the optical element in a desired position.
- optical element is adjusted during the heating phase, an exposure operation of the Strahlfor tion and illumination system or the lithographic system can be started even during the heating phase.
- the downtime of the beam-forming and Be illumination system or the lithographic system for example after an exchange (Engl .: swap) of the optical element, be significantly reduced.
- the adjustment of the optical element can thus be tracked in the current Be lichtungs resort.
- the optical element can advantageously be kept independent of its temperature in its specification by means of the adjusting device.
- measurements can be carried out in the current exposure mode and the pupil position can be readjusted.
- the measurements may be performed at a predetermined time interval, for example at a time interval of two hours. A deviation of the opti's element from its desired position can then be readjusted in each case in this time interval.
- the adjustment of the optical ele ments when changing a wafer stack (Engl .: lot) or even when changing ei Nes wafer are performed. This saves time.
- measurements from a previously performed exposure operation or a previously performed heating phase for adjusting the optical ele ments can be used. This makes it possible to dispense with measurements during the heating phase. This also saves time.
- the adjusting device is set up to continuously adjust the orientation and / or position of the optical element during the heating phase of the beam shaping and illumination system as a function of the measured field position and / or pupil position in order to hold the optical element in the desired position .
- continuous is preferably to be understood that the optical element by means of Justiereinrich device during the entire or at least during a large part of the heating phase can be adjusted.
- the heating up phase can take several hours. In particular, the heating phase lasts until a thermal equilibrium of the beam-forming and lighting system due to incident EUV radiation is reached.
- thermal equilibrium herein is meant a condition in which a temperature of the beam-shaping and illumination system or optical element is no longer increased and, in particular, remains constant. It is then a balance between introduced heat, while Game wise due to absorption of the EUV radiation, and dissipated heat, for example with the aid of a cooling system achieved.
- the thermal equilibrium can also be referred to as thermal saturation.
- the thermal equilibrium is preferably reached after several hours, for example after one to five hours.
- the beamforming and illumination system may be referred to as an optical system and vice versa.
- the beam-shaping and illumination system preferably comprises a plurality of optical elements, for example a field facet mirror, a pupil facet mirror and a condenser mirror.
- Each optical element may be a mirror module or referred to as a mirror module.
- a photomask may be arranged in an object plane of the beamforming and illumination system.
- An object field is positioned in the object plane.
- a position of this object field in the object plane is referred to as a field position of the beamforming and illumination system.
- a position of an entrance pupil of a projection system of the lithographic system is characterized as a pupil position of the beam-forming and illumination system.
- the optical element may be a facet mirror.
- a Fa cettenapt includes in particular a plurality of facets, which may be arranged in a cell shape or arrayed.
- a facet mirror may have several hundred to several thousand facets.
- Each facet can be positioned or adjusted individually.
- each facet can be assigned an actuator or actuating element, for example a so-called Lorentz actuator.
- Lorentz actuator comprises a magnetic element, which is coupled by means of a plunger with one facet each. With the help of several energized coils, the magnetic element can be deflected and the facet can be adjusted.
- a Lorentz actuator provides a force but no fixed path.
- the optical element can thus be a module or a unit with a multiplicity of facets and actuators and accordingly has a large thermal mass.
- the optical element is thus in particular a mirror array and can be adjusted or modulated as a whole who the. Due to its heating in the heating phase, the orientation can and / or the position of the optical element deviate from its desired position and is therefore readjusted.
- the Jus tier advantageously adjusts the entire optical element together with the facets as a unit during the heating phase.
- it can be dispensed with ver to the deflection range limiting individual adjustment of the facets.
- this does not rule out that a combined Jus days using the adjustment and simultaneously using the individual facets can be done.
- the entire optical element can be pre-adjusted with the aid of the adjusting device, in which case a fine adjustment by means of an adjustment of the individual facets can take place.
- the adjusting device may be provided a serial kinematics of the adjusting device and the individual control elements of the facets.
- the deflection range of an individual facets advantageously is not unduly limited.
- the adjusting device can be realized by the adjusting device to be realized way, which is required to hold the optical element in the desired position and / or ver in ver, reduced.
- An adjusting element of the adjusting device can thereby be made smaller.
- the optical element or an optically active surface example, a mirror surface
- the optical element preferably has six degrees of freedom, namely three translational degrees of freedom along a first spatial direction or c-direction, a second spatial direction or y-direction and a third spatial direction or z Direction as well as three rotatory degrees of freedom about the c-direction, the y-direction and the z-direction, respectively. That is, the position and the orientation of the optical element or the optically effective surface can be determined or described with the help of the six degrees of freedom.
- the adjusting device is adapted to adjust the optical element in all six degrees of freedom.
- Adjustment is accordingly to be understood that preferably both the orientation Orientation and the position of the optical element using the Justierein- direction can be changed to hold the optical element or the optically active surface in the desired position. If the optical element is not in the desired position but in a different actual position, the field position and / or the pupil position do not satisfy the specifications required for the exposure mode, in particular illumination specifications. The adjusting device then adjusts the optical element until it has been moved from the actual position to the desired position. Thus, the optical ele ment can be adjusted so that the field position and / or the pupil position meet the required specifications or it can Feldpo position and / or the pupil position changed or adjusted by a change in the position of the optical element.
- the "position” of the optical element or of the optically active surface is thus to be understood as meaning in particular its coordinates or the coordinates of a measuring point provided on the optical element with respect to the c-direction, the y-direction and the z-direction
- the "orientation" of the optical element or of the optically active surface is accordingly to be understood as meaning, in particular, its relationship with respect to the three spatial directions. That is, the optical element or the optically active surface of the same can be tilted about the c-direction, the y-direction and / or the z-direction. This results in the six degrees of freedom for the position and / or orientation of the optical element or the optically active surface.
- the "position” of the optical element or the optically effective surface area preferably comprises both its position or its position as well as its orientation. This means that the orientation and / or the position can also be summarized as a position or the position can be referred to as orientation and / or position. The terms “position” and “orientation and / or position” can thus be exchanged ge against each other.
- the adjusting device "holds" the optical element in the desired position is to be understood that the adjusting device always monitors on the basis of the measurement of the field position and / or the pupil position, whether the optical element is still in the desired position and accordingly possibly readjusted, so that this is again positioned in the desired position.
- the desired position can be subject to tolerances. The tolerance is designed so that the field position and / or the pupil position meets the specifications if the actual position of the optical element is within the tolerance range of the desired position.
- the adjusting device preferably comprises a measuring system for measuring the field position and / or the pupil position.
- the measuring system may include a calculating unit for calculating a correction recipe according to which the optical element is to be adjusted.
- the measuring system can be mobile.
- the measuring system can also be an integral part of the beam shaping and illumination system.
- the adjusting device may also include an adjusting element for continuous union changing the orientation and / or the position of the optical element and a control unit for driving the actuating element.
- the control unit is operatively connected to the measuring system.
- the control unit may be part of the measuring system or the measuring system may be part of the control unit.
- the opti cal element is adjusted during the heating phase.
- the measuring system may include a photosensitive sensor, for example, one or more CCD sensors (charge-coupled device, CCD).
- the sensor system may further comprise, for example, a sensor for measuring the energy distribution in the object plane.
- this sensor can be moved in the object plane, so that it can be moved into a beam path of the beam shaping and illumination system for measuring the field position and / or the pupil position in the object plane. After measuring, the sen can be moved out of the beam path again.
- the sensor system for measuring the field position and / or the pupil position can also include a photomask (reticle) provided with a measuring technique, which can also be moved in the object plane.
- the beam-forming and illumination system further comprises a plurality of optical elements, in particular a Feldfacettenspie gel, a pupil facet mirror and / or a condenser mirror, wherein the adjusting device is adapted to depending on the measured field position and / or pupil position orientation and / or to adjust a position of the optical elements relative to each other.
- the adjustment is preferably carried out continuously.
- the number of optical ele ments is arbitrary.
- three optical elements namely a field facet mirror, a pupil facet mirror and a condenser mirror, are provided. However, four or more than four optical elements may be provided.
- a facet mirror in particular comprises a multiplicity of facets, which may be arranged in a cell shape.
- the facets may be arcuate or crescent-shaped curved.
- the facets can also be very angular, for example hexagonal.
- a facet mirror may have several hundred to several thousand facets. Every facet can be tiltable for itself.
- the Strahlformungs- and Be illumination system further comprises a bearing device, in particular a hexapod, for the optical element, wherein the bearing means comprises a controllable by the Justiereinrich actuator, in particular a piezoelectric element comprises.
- the storage facility may be referred to as hexapod or the hexapod may be referred to as storage facility.
- the actuator can also be referred to as an actuator or actuator.
- Each optical element is associated with its own such storage device.
- the optical element may include a socket in which the optical element is received.
- the optical element can be decoupled from this version, in particular mechanically decoupled.
- the bearing device is preferably coupled to the socket.
- the bearing device operatively connects the socket to a base of the beam-forming and lighting system.
- the base can also be called a solid world.
- the base may be a support frame of the beam-forming and lighting system or the lithography system.
- the Lagereinrich device allows storage of the optical element in the aforementioned six degrees of freedom.
- the adjusting element may comprise one or more piezo elements or may be a piezo element.
- the adjusting element may alternatively be or comprise a manually or motor-adjustable threaded spindle.
- the actuator may also include a hydraulic or pneumatic drive. In the event that the actuator is a piezo element, the drive can thereby directly or via a solid-state gearbox for optimization of force, travel and positioning accuracy.
- the actuating element may comprise a piezoelectric stepping drive, which may be combined with a solid-state transmission to optimize power, travel and positioning accuracy.
- the storage device comprises six La gerritten each having an actuating element.
- each storage unit is preferably associated with at least one such
- the adjusting elements are controlled by the adjusting device, in particular by the control unit of the adjusting device, in particular energized to change the orientation and / or the position of the optical element in all six degrees of freedom.
- Each actuator allows in particular a linear movement along a longitudinal direction or a rod axis of the respective actuator associated bearing unit.
- each storage unit comprises a spacer which varies a length of the respective storage unit.
- the spacer may also be referred to as a spacer or tuning disc who the. Spacers with different gradation or granularity out vis their longitudinal extent with respect to the longitudinal direction or the rod axis of the respective storage unit can be maintained, from de nen then a suitable spacer is selected.
- the granularity of the spacers is preferably 5 gm.
- a length change of the same is feasible for adjusting the orientation and / or the position of the optical element on the bearing units.
- the change in length may include an increase in length or a Gaznverklei n réelle.
- the length change can, but does not have to, be carried out in two stages. With the aid of the spacer, the length change can be carried out in a first stage due to the above-described granularity with an accuracy of 5 gm. In a second stage can with Help the actuator to achieve an accuracy of up to 0.1 gm.
- the insertion of the spacer can also be dispensed with.
- the spacer can be dispensed with if a pre-adjustment has already been carried out and thus only a required change in length of less than 5 gm is to be expected.
- the actuating element can be brought from an undeflected state into a deflected state, wherein the actuating element is de-energized both in the undeflected state and in the deflected state.
- the adjusting element may be a so-called piezoelectric scraper or include such.
- the undeflected state may also be considered an unactuated state, and the deflected state may also be referred to as an actuated state.
- an electrical voltage to the actuator which before given to a piezoceramic, this undergoes a change in length.
- a further effect of piezo ceramics is that they undergo a change in length even when polarized. This change in length is permanent and can only be changed by repolarization. That is, after the Consmene tion, especially in the deflected state, no energy supply is no longer necessary to maintain the change in length. As a result, no heat is generated, which must be dissipated.
- the actuator is energized only to bring it from the undeflected state to the deflected state and vice versa. Otherwise, the Stel lelement is not energized. That is, no current is required to hold the deflected state.
- a control range of the control element is preferably be infinitely adjustable be. That is, the actuator can be preferably moved between the undeflected state and the deflected state steplessly in any number of intermediate states.
- each bearing unit comprises a first bending decoupling element, a second bending decoupling element and a rod section arranged between the first bending decoupling element and the second bending decoupling element, wherein the adjusting element lies between the first bending decoupling element and the second bending decoupling element, between the first bending decoupling element and the optical element or between the second bending decoupling element and a base of the beam shaping and illumination system is arranged.
- the actuator may be disposed in the rod portion and / or be part of the rod portion.
- the rod portion and the Biegeentkopp distribution elements are preferably in one piece, in particular centrein Divisionig formed.
- the bending decoupling elements may each comprise solid joints or be designed as solid joints. Under a "Festkör pergelenk" is presently preferred to understand a spring device, which allows a relative movement due to bending or - more generally - due to elastic deformation.
- the function of such a Fest Eisenegage steering is in particular by a range of reduced bending stiffness, for example, a resiliently deformable region with reduced material strength, relative to two adjacent areas of higher bending stiffness he goes.
- the reduced bending stiffness is thus generated in particular by a lo kale cross-sectional reduction.
- the aforementioned spacer may be positioned between the first bending decoupling element and the optical element or its socket or between the second bending decoupling element and the base.
- the spacer may be positioned as adjacent to the actuator or at the Biegeentkopp distribution element, where the actuator is not provided.
- lithography system in particular an EUV lithography system, proposed with such a beam-forming and lighting system.
- the lithography system may comprise a projection system and a light source, in particular an EUV light source.
- EUV stands for "extreme ultraviolet” and denotes a wavelength of working light between 0.1 nm and 30 nm.
- the lithography system can also be a DUV lithography system. DUV stands for “Deep Ultra violet” and denotes a wavelength of the working light between 30 nm and 250 nm.
- DUV stands for “Deep Ultra violet” and denotes a wavelength of the working light between 30 nm and 250 nm.
- the method comprises the steps of a) measuring a field position and / or a pupil position of the beamforming and illumination system, and b) adjusting an orientation and / or position of an optical element of the beamforming and illumination system during a heating phase of the beamforming Beam shaping and illumination system depending on the measured field position and / or pupil position such that the optical element is held in a desired position.
- the adjustment in step b) is preferably carried out continuously.
- the steps a) and b) are preferably carried out with the aid of the adjusting device.
- the Jus tier worn includes for this purpose the measuring system and for driving the whille- elements the control unit.
- the step a) is preferably carried out using working light, that is to say in particular EUV radiation, of the lithography system.
- the step a) can alternatively be carried out with the aid of measuring light of a measuring light source of the measuring system.
- the measuring light in this case is not EUV radiation.
- the measuring light is a laser beam.
- the measuring light can, for example, be coupled into the beam path of an intermediate focus plane of the beam shaping and illumination system and coupled out of the object plane in front of the object plane.
- a coupling device and a decoupling device each of which is designed, for example, as a motor-movable mirror, can be used.
- measuring the field Posi tion and / or the pupil position using the EUV radiation is carried out in step a), since then advantageously dispensed with an additional measuring light source who can. That is, while performing the process, the EUV light source is in operation.
- steps a) and b) are carried out iteratively until the field position and / or the pupil position comply with a required specification. That is, with the aid of the method, the field position and / or the pupil lenposition can be adjusted.
- the specification preferably includes a tolerance range within which the field position and / or the pupil position should lie.
- a correction formula for the optical element is calculated before or in step b), wherein the optical element is adjusted based on this correction recipe.
- the correction recipe is preferably calculated using the aforementioned computer unit, which may be part of the adjusting device.
- the correction recipe preferably comprises for each bearing unit of the bearing device of the respective optical element a statement about whether and to what extent a length change in the respective bearing unit is required in order to hold the respective optical element in the desired position.
- the method is carried out under vacuum and / or in the operation of an EU V light source of the beam-forming and lighting system.
- the optical element or the optical elements are preferably positioned in a housing of the beam shaping and illumination system.
- the ses housing is applied in particular in the exposure mode and during the heating phase to a vacuum.
- step b) the orientation and / or the position of the optical element is adjusted by the fact that at La geranneen a storage device of the optical element in each case a Län gen specificung is made.
- the change in length is made by means of an insertion of the previously mentioned spacer and / or by means of a control of the actuating element of the respective storage unit.
- the method is Runaway leads until a thermal equilibrium of the beam-forming and lighting system is reached. Once the thermal equilibrium is reached, for example after one to five hours, the process can be terminated. The actuator can then be switched off. The measurement system and / or the control unit may then be removed from the beamforming and illumination system, if appropriate. Alternatively, the measuring system and / or the control unit may also remain on the beam-forming and lighting system.
- FIG. 1A shows a schematic view of an embodiment of an EUV lithography system!
- Fig. 1B shows a schematic view of an embodiment of a DUV lithography system!
- FIG. 2 shows a schematic view of an embodiment of an optical system for the lithography system according to FIG. 1A or FIG. 1B;
- FIG. 2 shows a schematic view of an embodiment of an optical system for the lithography system according to FIG. 1A or FIG. 1B;
- FIG. 3 shows a further schematic view of the optical system according to FIG.
- FIG. 4 shows a further schematic view of the optical system according to FIG.
- FIG. 5 shows a further schematic view of the optical system according to FIG.
- FIG. 6 shows a schematic perspective view of an embodiment of a storage unit for the optical system according to FIG.
- FIG. 7 shows the detailed view VII according to FIG. 6;
- FIG. 8 shows the detailed view IIX according to FIG. 6;
- Fig. 9 shows a schematic view of an embodiment of a Justierein device for the optical system of FIG. 2;
- FIG. 10 shows a schematic view of a further embodiment of an adjusting device for the optical system according to FIG. 2;
- FIG. 11 shows a schematic block diagram of an embodiment of a method for adjusting the optical system according to FIGS
- FIG. 12 shows a schematic block diagram of a further embodiment of a method for adjusting the optical system according to FIG. 2.
- 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” (EngU extre ⁇ me ultraviolet, EUV), and denotes a wavelength of the working light Zvi ⁇ rule 0.1 nm and 30 nm.
- the beam shaping and illumination system 102 and projection system 104 are each in a not shown Provided vacuum housing, each vacuum housing is evacuated by means of a not illustrated ⁇ set evacuation device.
- the vacuum housings are surrounded by a machine room, not shown, in which drive ⁇ devices are provided for the mechanical method or setting of optical elements. Furthermore, electric Steue ⁇ stanchions and the like provided in this engine room can be.
- the EUV lithography system 100A has an EUV light source 106A.
- an EUV light source 106A for example, a plasma source (or a Syn ⁇ chrotron) may be provided which emits radiation 108A in the EUV range (extremely ult ⁇ ravioletter area), ie for example in the wavelength range of 5 nm to 20 nm.
- the EUV radiation 108A is collimated and the desired operating wavelength is filtered out of the EUV radiation 108A.
- the 106A erzeug ⁇ te of the EUV light source EUV radiation 108A has a relatively low transmissivity by air, which is why the beam guide spaces in the beam shaping and illuminating ⁇ system is evacuated and 102 in the projection system 104th
- the beam shaping and illumination system 102 shown in FIG. 1A has five mirrors 110, 112, 114, 116, 118.
- the EUV radiation 108A is heated to a Photomask (Engl .: reticle) 120 headed.
- the photomask 120 is also formed as a reflective optical element and may be disposed outside of the systems 102, 104. Further, the EUV radiation 108A can be directed to the photomask 120 by means of a Spie ⁇ gels 122nd
- 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 to M6 for imaging the photomask 120 onto the wafer 124.
- individual mirrors Ml 104 may be arranged symmet ⁇ driven to an optical axis 126 of projection system 104 to M6 of the projection system.
- the number of mirrors M1 to M6 of the EUV lithography apparatus 100A is not limited to the number shown. It is also possible to provide more or fewer mirrors M1 to M6.
- the width ⁇ ren the mirrors Ml to M6 are curved generally at its front side for Strahlfor ⁇ determination.
- Fig. 1B is a schematic view of a DUV lithography system 100B which includes a beam shaping and illumination system 102 and a projection system 104 ⁇ .
- DUV stands for "deep ultraviolet” (Engl .: deep ultra violet DUV)
- the beam shaping and illumination system 102 and the projek ⁇ tion system 104 may -.
- the beam shaping and illumination system 102 and the projek ⁇ tion system 104 may -.
- Fig. 1A arranged in egg ⁇ nem vacuum housing and / or be surrounded by a machine room with ent ⁇ speaking drive devices.
- the DUV lithography system 100B has a DUV light source 106B.
- a DUV light source 106B ArF excimer laser for example, 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 by means of the projection system 104 reduced to a wafer 124 or the like Chen is mapped.
- 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 an optical axis 126 of the projection system 104.
- the number of lenses 128 and mirrors 130 of the DUV lithography system 100B is not limited to the number shown. Also, more or less lenses 128 and / or mirrors 130 may be provided. Furthermore, the mirrors 130 are typically 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 132 may be, for example, high purity water. Such a structure is also referred to as immersion lithography and has an increased photolithographic resolution.
- the medium 132 may also be referred to as immersion liquid.
- FIG. 2 shows a schematic view of an optical system 200.
- the optical system 200 is a beamforming and illumination system 102, in particular a beamforming and illumination system 102 of an EUV lithography system 100A.
- the optical system 200 may therefore also be used as a beam forming and illumination system and the beam-forming and lighting system 102 may be referred to as an optical system.
- the optical system 200 may also be part of a DUV lithography system 100B.
- FIG. 2 also shows an EUV light source 106A which emits EUV radiation 108A and a photomask 120.
- the optical system 200 includes a plurality of optical elements 202, 204, 206, 208. Further, an optional deflection mirror 210 may be provided.
- the deflecting mirror 210 is operated with grazing incidence (EngU grazing incidence) and can therefore also be referred to as grazing incidence mirror.
- the deflecting mirror 210 may correspond to the mirror 122 shown in FIG. 1A.
- the opti ⁇ rule elements 202, 204, 206, 208 can match the levels shown in Fig. 1A 110, 112, 114, 116, 118.
- the optical element 202 may be a facet mirror, in particular a pupil facet mirror ⁇ , the optical system 200th
- the optical element 204 may also be a facet mirror, in particular a field facet mirror, of the optical system 200.
- At least one of the optical elements 206, 208 may be a condensing mirror of the optical system 200.
- the number of optical elements 202, 204, 206, 208 is arbitrary. For example, 1A, as shown in the FIG., Five optical elements 202, 204, 206, 208 or, as shown in FIG. 2 ge ⁇ shows four optical elements 202, 204, 206, 208 may be provided. However, three optical elements 202, 204, 206, 208, namely a Pupil ⁇ lenfacettenapt, a field facet mirror and a condensing mirrors are preferably at least vorgese ⁇ hen.
- a facet mirror comprising a plurality of facets that can be cell-shaped manner ⁇ assigns.
- the facets may be arcuate or crescent-shaped curved.
- the facets can also be polygonal, for example hexagonal.
- a facet mirror may have several hundred to several thousand Fa ⁇ cetten. Every facet can be tiltable for itself.
- the optical elements 202, 204, 206, 208 are disposed within a housing 212.
- the housing 212 may be subjected to a vacuum. That is, the optical elements 202, 204, 206, 208 are arranged in a vacuum ⁇ .
- the EUV light source 106A emits EUV radiation 108A.
- a tin plasma can be generated.
- a Zinnmaschine for example, a tin or a tin droplets ⁇ beads.
- the collector concentrates the EUV radiation 108A in an intermediate focus plane 214.
- the EUV radiation 108A is reflected by each of the optical elements 202, 204, 206, 208 and the deflection mirror 210 when passing through the optical system 200.
- a beam path of the EUV radiation 108A is designated by the reference numeral 216.
- the photomask 120 is arranged in an object plane 218 of the optical system 200 at.
- an object field 220 is positioned in the object plane 218, an object field 220 is positioned.
- a position of the object field 220 in the object plane 218 is referred to as a field position.
- a position of an entrance pupil of a projection system 104 not shown in FIG. 2 is referred to as a pupil position of the optical system 200.
- FIG. 2 furthermore shows a mobile measuring system 300.
- the measuring system 300 may be provided on the outside of the housing 212.
- the measurement system 300 may be part of the optical system 200.
- the measuring system 300 is preferably not part of the optical system 200 and can be separated again from the optical system 200 after a measuring operation.
- the measuring system 300 may be suitable for coupling measurement light, for example a laser beam, into the radiation passage 216 and for coupling it out again after passage through the optical elements 202, 204, 206, 208.
- the measuring system 300 preferably operates without its own measuring light emitting measuring light source. That is, the measurement system 300 preferably operates with the EUV radiation 108A.
- the measuring system 300 still has a measuring light source, this is - as mentioned above - arranged to emit measuring light.
- the measuring light in this case is not EUV radiation 108A.
- the measuring system 300 then includes a coupling device for coupling the measuring light into the beam path 216.
- the coupling device may be a mo toric movable or pivotable mirror.
- Einkoppe l With the help of Einkoppe l
- the measuring light can be coupled, for example, at the Eisenfokusebene 214 in the beam path 216.
- the measuring system 300 has a decoupling device for decoupling the measuring light from the beam path 216.
- the decoupling device can be a motorized or movable be pivotable mirror.
- the measuring light can preferably be decoupled from the beam path 216 in front of the object plane 218.
- the measuring system 300 may preferentially measure the field position and the pupil position with the EUV radiation 108A instead of measuring light. This makes it possible verzich switched to a separate Messlichtquel le as well as the coupling device and the decoupling device.
- the measuring system 300 further includes a photosensitive sensor, example, one or more CCD sensors (Engl .: charge-coupled device, CCD). Furthermore, the measuring system 300 comprises a computer unit. With the help of the measuring system 300, the field position and the pupil position can be determined or measured.
- the sensor system may include, for example, a sensor for measuring the energy distribution in the object plane 218. For example, this sensor can be moved in the object plane 218 so that it can be moved into the beam path 220 for measuring the field position and / or the pupil position in the object plane 218.
- the sensor system can also comprise a photomask 120 (reticle) provided with a measuring technique, which can also be moved in the object plane 218.
- FIG. 3 shows another view of the optical system 200, but only the optical element 202 is shown.
- the following explanations concerning the optical element 202 apply correspondingly to the optical elements 204, 206, 208. That is, the optical elements 202, 204, 206, 208 can be constructed identically in particular with regard to their storage explained below.
- the optical element 202 comprises a substrate 222 and an optically active surface 224, for example a mirror surface.
- the optically effective area 224 may be provided on a multiplicity of facets in the case where the optical element 202 is a facet mirror.
- the optical element 202 or the optically effective surface 224 has six degrees of freedom, namely three translational degrees of freedom respectively along a first spatial direction or c-direction x, a second spatial direction or y-direction y and a third spatial direction or z-direction z as well as three rotational freedom in each case about the c-direction x, the y-direction y and the z-direction z.
- a position and an orientation of the optical element 202 be ⁇ relationship as the optically active surface 224 can be determined or described by using the six degrees of freedom.
- the optical element 202 and the optically active surface 224 are in particular its, or their coor ⁇ ordinates or the coordinates of a provided on the optical element 202, the measuring point with respect to the c-direction x, the y-direction y and z Direction z to understand.
- the optically effective surface 224 is in particular of that relationship ⁇ example, to understand the tilt with respect to the three spatial directions x, y, z. That is, the optical element 202 and the optically effective FLAE ⁇ che 224 may around the c-direction of x, y-y direction and / or the z-direction z are tilted.
- a "location" of the optical element 202 whiteningswei ⁇ se the optically active surface 224 includes both its, or their position as well as its or their orientation.
- a target location is by solid lines IL of the optical Ele ⁇ ments 202 and with dashed lines and the reference numeral 202 'Bezie ⁇ hung as 224' SL of the optical element 202 'and the optically active surface 224 'shown.
- the optical system 200 does not meet the specifications, in particular the lighting specifications, with respect to the field position and the pupil position.
- the optical system 200 In the desired position SL, the optical system 200 satisfies the field position and pupil position specifications.
- the optical system 200 is assigned a base 400.
- the base 400 may also be referred to as a fixed world.
- the base 400 may be a support frame (Engl4 force frame) of the optical system 200 or the EUV lithography system 100A.
- the optical element 202 may include a socket 226 (FIG. 4) in which the optical element is received.
- the optical element 202 can be decoupled from this socket 226, in particular be mechanically decoupled.
- a "mechanical decoupling" is to be understood as meaning that no or at least only very small forces can be transmitted from the optical element 202 to the holder 226 and / or vice versa.
- the optical element 202 may also include a cooling system, not shown.
- the optical element 202 can therefore also be referred to as a module, in particular as a mirror module.
- a "solid-body joint” is preferably a spring device which has a relative movement due to bending or, more generally, due to elastic Deformation allowed.
- the elastic deformation of the respective solid-state joint can therefore come about with a relative movement of the optical element 202 relative to its socket 226 or vice versa.
- the function of such a solid-state joint is achieved, in particular, by a region of reduced bending stiffness, for example a region with reduced material thickness which is elastically deformable in a spring-elastic manner, relative to two adjacent regions of greater bending stiffness.
- the reduced bending stiffness is thus generated in particular by a local reduction in cross-section.
- the optical element 202 is coupled to the base 400 by means of a bearing device 500.
- the bearing device 500 is a so-called hexapod relation ship as may be referred to as hexapod.
- the bearing device 500 makes it possible to move the optical element 202 or the optically active surface 224 in the six degrees of freedom.
- the bearing device 500 is preferably not directly connected to the optical element 202, but with the Sen version 226 operatively connected.
- the bearing device 500 includes six bearing units 502, 504, 506, 508, 510, 512.
- the bearing units 502, 504, 506, 508, 510, 512 are rod-shaped and may be referred to as pins.
- the bearing units 502, 504, 506, 508, 510, 512 may engage in pairs via an adapter 514 associated with the respective pair on the optical element 202, more precisely on its socket 226.
- the adapter 514 may be, for example, on Eckpunk th an imaginary triangle in a plan view of the optical element 202 be relationship be on the socket 226.
- FIG. 5 shows a possible embodiment of the bearing unit 502.
- the bearing units 504, 506, 508, 510, 512 may be constructed analogously.
- 6 shows a schematic perspective view of a part of the bearing unit 502
- FIG. 7 and FIG. 8 respectively show detail views VII or IIX according to FIG. 6.
- the bearing unit 502 comprises a first bending decoupling element 516 which is operatively connected with the aid of the adapter 514 to the optical element 202 or to its socket 226.
- an optional spacer or spacer 518 may be provided between the adapter 514 and the optical element 202 or the socket 226, an optional spacer or spacer 518 may be provided.
- the spacer 518 may be a tuning disk or referred to as a tuning disk. That is, the adapter 514 is connected via the spacer 518 to the optical element 202 and the socket 226, respectively.
- the adapter 514 may be referred to as a first adapter.
- Spacers 518 with different gradation or granularity Lich regard to their longitudinal extent with respect to a longitudinal direction L of the storage unit 502 can be kept, from which then a suitable spacer 518 is selected.
- the granularity of the spacers 518 is preference, 5 gm.
- the first bending decoupling element 516 is ver with a rod portion 520 connected.
- the first bending decoupling element 516 is in one piece, in particular special material integral, formed with the rod portion 520.
- the bearing unit 502 Facing away from the first bending decoupling element 516, the bearing unit 502 comprises a second bending decoupling element 522.
- the second bending decoupling element 522 is preferably in one piece, in particular centrein Sharingig, formed with the rod portion 520.
- the rod portion 520 comprises a rod axis S, to which the rod portion 520 is rotationally symmetrical.
- the longitudinal direction L is oriented parallel to the rod axis S.
- a further adapter 524 is provided between the adapter 524 and the base 400.
- an actuator 526 is positioned between the adapter 524 and the base 400.
- the actuator 526 may also be referred to as an actuator or actuator.
- the actuator 526 allows a linear movement along the longitudinal direction L of the bearing unit 502.
- the actuator 526 may therefore be referred to as a linear actuator, linear actuator or Linearak tuator.
- the longitudinal direction L may coincide with the z-direction z or be parallel to it.
- the adapter 524 may be referred to as a second adapter.
- the first adapter 514, the first Biegeent coupling element 516, the rod portion 520, the second bending decoupling element 522 and the second adapter 524 are preferably integrally formed, in particular centrein Divisionig.
- the bending decoupling elements 516, 522 are preferably solid-state joints or comprise solid-body joints.
- the actuator 526 may alternatively be positioned between the bending decoupling elements 516, 522, as indicated in Fig. 5 by the reference numeral 526 '. Furthermore, the actuator 526 may also be positioned between the adapter 514 and the spacer 518 or between the spacer 518 and the optical element 202 or the socket 226. Again, spacer 518 may alternatively be positioned between adapter 524 and base 400, between base 400 and actuator 526, or between actuator 526 and adapter 524.
- the first bending decoupling element 516 is shown in FIGS. 6 and 7, each in a perspective view.
- the first bending decoupling element 516 to summarizes two leaf spring sections 528, 530, which are connected via a kausab 532 together.
- the leaf spring sections 528, 530 and the connecting section 532 can be manufactured as a one-piece component, in particular made of metal.
- Each of the leaf spring sections 528, 530 has a main extension plane E.
- the main extension planes E are perpendicular to each other.
- the bearing unit 502 can have a perpendicular to the main extension plane E of the leaf spring section 528 in the y-direction y and a perpendicular to the main extension plane E of the Blattfe derabrough 530 in the c-direction x.
- the first bending decoupling element 516 thus has an articulation which allows the rod section 520 to pivot about the c-direction x as well as the y-direction y as well.
- the x-direction x and the y-direction y are perpendicular to each other and each perpendicular right to the z-direction z.
- Corresponding bending axes of the leaf spring sections 528, 530 are denoted by R and T and may, as mentioned, with the rich lines x and y coincide.
- the first bending decoupling element 516 is arranged on an end of the rod section 520 facing the optical element 202.
- the tendencylie ing the second Biegeent coupling element 522 is disposed at another end of the rod portion 520. This has an identical construction to the first Biegeent coupling element 516, which is shown in FIG. 8.
- the bearing unit 502 can only force, which act exclusively along the longitudinal direction L or the rod axis S, transmitted.
- the actuator 526 may be or include a manually or motor-adjustable threaded spindle. Further, the actuator 526 may also include a hydraulic or pneumatic drive. Alternatively, the actuator 526 may be a piezoelectric actuator or include such. The drive can be done directly or via a solid-state gearbox to optimize power, travel and positioning accuracy. Furthermore, the actuator 526 may include a piezoelectric stepping drive, which may be combined to optimize the power, travel and positioning accuracy with a solid state gear.
- the actuator 526 as shown in FIG. 9, a piezoelectric element or comprises one or more piezoelectric elements.
- a piezoelectric element or comprises one or more piezoelectric elements.
- the actuator 526 have a control range AA of 10 gm.
- the maximum change in length, that is, the adjustment range AA, a piezoceramic is about 0.1% of its initial length A.
- the actuator 526 therefore has an initial length A of about 10 mm.
- the positioning accuracy of the actuator 526 is 0.1 gm.
- the use of a piezoceramic for the actuator 526 has the fol lowing advantages. There are no mutually movable components required. This can not lead to a seizure of the components. After setting the desired length change, no power supply to the actuator 526 is required, which also eliminates the need to generate heat. Furthermore, no separate sensor system is required in or on the adjusting element 526 since the field position and the pupil position can be measured di rectly with the aid of the measuring system 300.
- the control element 526 is a control unit 600 for energizing the same ordered.
- the control unit 600 may be part of the optical system 200.
- the adjusting element 526 can be moved from an undeflected state ZI into a deflected state Z2 and vice versa.
- the actuator is designated by the reference numeral 526 "in Fig. 9.
- the actuator 526 is energized only for bringing it from the non-steered state ZI to the deflected state Z2 That is, for holding the deflected state Z2 is not
- the setting range DA is infinitely adjustable. That is, the actuator 526 can be moved between the undeflected state ZI and the deflected state Z2 continuously in any number of insectstän the.
- control unit 600 can be removed again.
- control unit 600 may also be an integral part of the optical system 200.
- Each control element 526 of the bearing units 502, 504, 506, 508, 510, 512 may be associated with such a control unit 600.
- all adjusting elements 526 of the bearing units 502, 504, 506, 508, 510, 512 can also be controlled by a common control unit 600.
- An actuating element 526 can also be or comprise a so-called pebble crawler.
- a "piezocrawler” is a linear arrangement of interconnected piezo actuators or a piezo stack, which can move on a surface as a result of alternating activation of the piezoactuators in the manner of a bead.
- Such a piezocrawler is preferably self-locking, so that it does not automatically reset when not energized. With the help of trained in this case as Piezokrabbler Stel lelements 526 this can spend by energizing continuously from the unausge steered state ZI in the deflected state Z2. To hold the deflected state Z2 is then, as previously mentioned, no current required neces sary.
- the control unit 600 is preferably operatively connected to the measuring system 300, so that the control unit 600, the control elements 526 depending on Messwer th of the measuring system 300, that is, depending on the measured field position and the measured pupil position, can control.
- the control unit 600, the measuring system 300 and the adjusting element 526 are part of an adjusting device 700.
- the control unit 600 or the adjusting device 700 is suitable for changing the position and / or orientation of each of the optical elements 202, 204, 206, 208. around the optical elements 202, 204, 206,
- Each storage unit 502, 504, 506, 508, 510, 512 may be associated with such a Justierein device 700.
- an adjusting device 700 several bearing units 502, 504, 506, 508, 510, 512, for example, all La geranneen 502, 504, 506, 508, 510, 512 associated with a bearing device 500.
- the adjusting device 700 may be part of the bearing device 500 or vice versa.
- each optical element 202, 204, 206, 208 may be assigned such an adjusting device 700.
- a Justiereinrich device 700 may be assigned to a plurality of optical elements 202, 204, 206, 208.
- FIG. 10 shows a further embodiment of an adjusting device 700.
- the adjusting element 526 as suitable, with the aid of a slide construction, the adapter 524 of the respec conditions storage unit 502, 504, 506, 508, 510, 512 linearly relative to base 400.
- an angle of inclination a of the respective bearing unit 502, 504, 506, 508, 510, 512 can be set, for example, relative to a horizontal H ver.
- the adjusting element 526 could be designed as a piezo element or piezocrawler. This linear displaceability is indicated in FIG. 10 by means of a double arrow 534.
- the carriage construction can be designed to be self-locking, so that it does not automatically reset when a non-energization of the
- the adjusting device 700 is thus to be rich ⁇ tet with the aid of the linear displacement of the respective adapter 524, the position and / or orientation of each of the optical elements 202, 204, 206 to change 208 to the optical elements 202, 204, 206, 208 of their respective actual spending able IL in the required target position SL and to keep in the ⁇ ser. It is also possible to combine a wide variety of adjusting elements 526 with each other.
- optical system 200 The functionality of the optical system 200 will be explained below. ⁇ often times it may after some time, the exposure operation may be required, single ⁇ ne optical elements 202, 204, 206 to replace the 208th For example, in the exposure mode, tin from the EU V light source 106A may enter the optical system 200. This can lead to a degradation of the optically active surface 224 of the optical elements 202, 204, 206, 208 or individual ones of the optical elements 202, 204, 206, 208.
- the replacement of the optical elements 202, 204, 206, 208 should thereby advantageously without removal and installation of the entire optical system 200, preferably on site, that is, at the site of the EUV lithography system 100A, and with the least possible downtime (Engl4 downtime) the EUV lithography system 100A be possible.
- the optical elements 202, 204, 206, 208 may also be necessary during a heating phase of the optical ⁇ 's system 200, the optical elements 202, 204, 206, 208 to adjust in order to achieve optimum field position and pupil position during the heating phase. That is, advantageously, then even during the heating phase on ⁇ the exposure operation to be started and the expensive EUV radiation 108A can then be used not only for heating, but even during the heating phase for exposure.
- the heating phase can take several hours, for example one to five hours.
- the Aufgenesispha ⁇ se takes particular until a thermal balance of the optical system 200 is achieved due to the incident EUV radiation 108A.
- a "thermal equilibrium” is to be understood as meaning a state in which a temperature of the optical system 200 or of the optical elements 202, 204, 206, 208 no longer increases and, in particular, remains constant. It is then a balance between introduced heat, for example, ⁇ due to absorption of the EUV radiation 108A, and heat dissipated, for example by means of a cooling system achieved.
- ⁇ due to absorption of the EUV radiation 108A
- heat dissipated for example by means of a cooling system achieved.
- it is also notwen ⁇ dig, the position of each optical element 202, 204, 206, 208 tonepas ⁇ sen.
- a fast and targeted adjustment is essential in order to achieve the lowest possible downtime.
- the adjustment of the optical elements 202, 204, 206, 208 or one of the optical elements 202, 204, 206, 208 after an exchange of one or more optical elements 202, 204, 206, 208 can, according to a method shown in FIG Adjusting the optical system 200 done.
- the field position and the pupil position is on the optical system 200 initially with the originally ⁇ Lich built-in optical elements 202, 204, 206, as measured.
- a step S2 the desired optical element 202, 204, 206, 208 is exchanged.
- a step S3 the field position and the Pupil ⁇ lenposition is measured again.
- the steps S 1 to S 3 are preferably carried out without a vacuum applied to the housing 212.
- a correction recipe is calculated.
- the measuring system 300 may comprise a computer unit or be coupled to a computer unit.
- the correction prescription comprises the ge ⁇ exchanged optical element 202, 204, 206, 208 and optionally also for the non-exchanged optical element 202, 204, 206, 208 each have a Consn Masse ⁇ tion AL (Fig. 9) along the rod axis S of the corresponding Bearing units 502, 504, 506, 508, 510, 512, which is required to the respective optical Ele ⁇ ment 202, 204, 206, 208 from its actual position IL in its desired position SL zuin ⁇ gene (Fig. 3).
- the storage units 502, 504, 506, 508, 510 at each of the storage units 502, 504, 506, 508, 510,
- step S5 a matching spacer 518 is inserted, which is selected from a plurality of spacers 518 having a length gradation of 5 gm. With the aid of the spacer 518, the change in length AL can thus be set with an accuracy of 5 gm.
- a vacuum can be applied to the housing 212. In the event that the required change in length AL is less than 5 gm, the insertion of the spacer 518 can also be dispensed with.
- step S6 the actuator 526 is now deflected to adjust the Constell change AL to 0.1 gm exactly.
- the corresponding Stel lelement 526 is controlled by means of the control unit 600. If the desired change in length AL reached, the actuator 526 can be switched off.
- the step S6 can already be carried out under vacuum.
- a step S7 the field position and the pupil position are measured again.
- the steps S4, S6 and S7 are iteratively repeated, especially under vacuum, until the required specification with respect to the field position and the pupil position is reached.
- the pupil position can also be determined via the so-called overlay on the wafer 124.
- overlay refers to the positioning accuracy or coverage accuracy of structures from different production steps, generally two photolitho-graphic levels. That is, with the help of the procedure, the overlay can also be improved.
- the method may also be performed for Clearjustage during assembly of the optical system 200 sys. Furthermore, the method can also be used to correct setting effects that may occur during transport of the optical system 200. This is particularly advantageous because the optical system 200 is mostly tilted due to its size during transport must become. Furthermore, aging effects, such as creep effects or set effects, of other components of the optical system 200 may be corrected. Also thermal effects, such as drifts that may occur after the machine adjustment, can be corrected.
- the method may be adapted to, the downtime for setup of the optical system 200, the example ⁇ example after a replacement of the optical elements 202, 204, 206, 208 to reduce or compensate for changes resulting from a change in the lighting setting.
- This procedure of FIG. 12 is preferably carried out un ⁇ ter vacuum and operation of EU V- light source 106A.
- the actuator 526 is preferably designed as an active actuator. The actuating element 526 can then be controlled in dependence on the measured with the aid of Messsys ⁇ tems 300 field position and pupil position with the aid of the control ⁇ unit 600 to the respective optical element 202, 204,
- ⁇ element 526 is thus part of a control loop that actively the field position and the pupil position under adjustment of the optical element 202, 204, 206, 208 kori ⁇ yaws.
- the method includes a step S10 of measuring the field position and the pupil position with the aid of the measuring system 300.
- a step S20 the orientation and / or position of the optical element 202, 204, 206, 208 currency ⁇ rend the heating phase of the optical system 200 in Depending on the ge ⁇ measured field position and / or pupil position adjusted such that the opti ⁇ cal element 202, 204, 206, 208 is always maintained in its desired position SL. So ⁇ long as the optical element 202, 204, 206, 208 is in the desired location SL, the required specifications for the field position and the pupils ⁇ position can be maintained.
- step S20 a correction recipe for the optical element 202, 204, 206, 208 is also calculated.
- the control unit 600 further controls the actuator 526 so that the optical element 202, 204, 206, 208 is moved from its actual position IL to the desired position SL and held in the desired position SL.
- the steps S10, S20 are carried out iteratively until the required specifications with regard to the field position and the Pupil lenposition are reached.
- the method according to FIG. 12 can be part of the method according to FIG. 11.
- the method according to FIG. 12 can in particular also be carried out according to the method according to FIG. 11.
- the method according to FIG. 12 is carried out continuously during the heating phase of the optical system 200 with constant correction of the position of the optical element 202, 204, 206, 208.
- the exposure mode can be started even during the heating phase, whereby the downtime of the optical system 200, for example, after replacement of one of the optical elements 202, 204, 206, 208, can be significantly reduced.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Epidemiology (AREA)
- Environmental & Geological Engineering (AREA)
- Public Health (AREA)
- Toxicology (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Plasma & Fusion (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980019157.XA CN111868633A (zh) | 2018-03-15 | 2019-03-06 | 用于光刻***的束形成和照明***、光刻***和方法 |
KR1020207028921A KR20200132909A (ko) | 2018-03-15 | 2019-03-06 | 리소그래피 시스템을 위한 빔 형성 및 조명 시스템, 리소그래피 시스템, 및 방법 |
US17/019,931 US11448968B2 (en) | 2018-03-15 | 2020-09-14 | Beam-forming and illuminating system for a lithography system, lithography system, and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018203925.9 | 2018-03-15 | ||
DE102018203925.9A DE102018203925A1 (de) | 2018-03-15 | 2018-03-15 | Strahlformungs- und Beleuchtungssystem für eine Lithographieanlage und Verfahren |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/019,931 Continuation US11448968B2 (en) | 2018-03-15 | 2020-09-14 | Beam-forming and illuminating system for a lithography system, lithography system, and method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019174996A1 true WO2019174996A1 (de) | 2019-09-19 |
Family
ID=65817967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2019/055594 WO2019174996A1 (de) | 2018-03-15 | 2019-03-06 | Strahlformungs- und beleuchtungssystem für eine lithographieanlage, lithographieanlage und verfahren |
Country Status (5)
Country | Link |
---|---|
US (1) | US11448968B2 (de) |
KR (1) | KR20200132909A (de) |
CN (1) | CN111868633A (de) |
DE (1) | DE102018203925A1 (de) |
WO (1) | WO2019174996A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020212870A1 (de) | 2020-10-13 | 2022-04-14 | Carl Zeiss Smt Gmbh | Optische Komponente und Verfahren zur Justage der optischen Komponente, sowie Projektionsbelichtungsanlage |
DE102021205278B4 (de) | 2021-05-21 | 2023-05-17 | Carl Zeiss Smt Gmbh | Einstellbarer Abstandshalter, Optisches System, Projektionsbelichtungsanlage und Verfahren |
DE102022204015A1 (de) | 2022-04-26 | 2023-10-26 | Carl Zeiss Smt Gmbh | Aktuator und Deformationsspiegel |
DE102022207148A1 (de) * | 2022-07-13 | 2024-01-18 | Carl Zeiss Smt Gmbh | Projektionsbelichtungsanlage für die Halbleiterlithographie |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160342097A1 (en) * | 2011-01-20 | 2016-11-24 | Carl Zeiss Smt Gmbh | Method of operating a projection exposure tool for microlithography |
DE102016203990A1 (de) | 2016-03-10 | 2017-09-14 | Carl Zeiss Smt Gmbh | Verfahren zum Herstellen eines Beleuchtungssystems für eine EUV-Projektionsbelichtungsanlage, Beleuchtungssystem und Messverfahren |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60126103T2 (de) * | 2000-08-18 | 2007-11-15 | Nikon Corp. | Haltevorrichtung für optisches Element |
JP4666908B2 (ja) * | 2003-12-12 | 2011-04-06 | キヤノン株式会社 | 露光装置、計測方法及びデバイス製造方法 |
JP5134732B2 (ja) * | 2008-10-31 | 2013-01-30 | カール・ツァイス・エスエムティー・ゲーエムベーハー | Euvマイクロリソグラフィ用の照明光学系 |
DE102009009221A1 (de) * | 2009-02-17 | 2010-08-26 | Carl Zeiss Smt Ag | Projektionsbelichtungsanlage für die Halbleiterlithographie mit einem Aktuatorsystem |
WO2012041462A2 (en) * | 2010-09-29 | 2012-04-05 | Carl Zeiss Smt Gmbh | Systems for aligning an optical element and method therefor |
DE102012211846A1 (de) * | 2012-07-06 | 2013-08-01 | Carl Zeiss Smt Gmbh | Verfahren zum Messen einer winkelaufgelösten Intensitätsverteilung sowie Projektionsbelichtungsanlage |
-
2018
- 2018-03-15 DE DE102018203925.9A patent/DE102018203925A1/de not_active Ceased
-
2019
- 2019-03-06 KR KR1020207028921A patent/KR20200132909A/ko not_active Application Discontinuation
- 2019-03-06 CN CN201980019157.XA patent/CN111868633A/zh active Pending
- 2019-03-06 WO PCT/EP2019/055594 patent/WO2019174996A1/de active Application Filing
-
2020
- 2020-09-14 US US17/019,931 patent/US11448968B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160342097A1 (en) * | 2011-01-20 | 2016-11-24 | Carl Zeiss Smt Gmbh | Method of operating a projection exposure tool for microlithography |
DE102016203990A1 (de) | 2016-03-10 | 2017-09-14 | Carl Zeiss Smt Gmbh | Verfahren zum Herstellen eines Beleuchtungssystems für eine EUV-Projektionsbelichtungsanlage, Beleuchtungssystem und Messverfahren |
Also Published As
Publication number | Publication date |
---|---|
CN111868633A (zh) | 2020-10-30 |
DE102018203925A1 (de) | 2019-09-19 |
US11448968B2 (en) | 2022-09-20 |
US20210003925A1 (en) | 2021-01-07 |
KR20200132909A (ko) | 2020-11-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019174996A1 (de) | Strahlformungs- und beleuchtungssystem für eine lithographieanlage, lithographieanlage und verfahren | |
WO2021115641A1 (de) | Optisches system, sowie heizanordnung und verfahren zum heizen eines optischen elements in einem optischen system | |
WO2015124555A1 (de) | Spiegel-array | |
DE102020210773B4 (de) | Optische Baugruppe, Verfahren zur Ansteuerung einer optischen Baugruppe und Projektionsbelichtungsanlage | |
WO2020057873A1 (de) | Baugruppe eines optischen systems, insbesondere in einer mikrolithographischen projektionsbelichtungsanlage, sowie verfahren zum betreiben eines solchen optischen systems | |
DE102018220565A1 (de) | Projektionsbelichtungsanlage für die Halbleiterlithographie mit einem semiaktiven Abstandshalter und Verfahren zur Verwendung des semiaktiven Abstandshalters | |
DE102007058158A1 (de) | Optisches System mit einer austauschbaren, manipulierbaren Korrekturanordnung zur Reduzierung von Bildfehlern | |
DE102017209794B4 (de) | Vorrichtung und Verfahren zur Ausrichtung eines optischen Elements, sowie Projektionsbelichtungsanlage | |
WO2024061599A1 (de) | Führung von komponenten einer optischen einrichtung | |
WO2024033083A1 (de) | Verfahren zur stabilisierung einer klebstoffverbindung einer optischen baugruppe, optische baugruppe und projektionsbelichtungsanlage für die halbleiterlithographie | |
DE102020214130A1 (de) | Verfahren zur Temperierung eines optischen Elementes und optische Baugruppe | |
DE102011104543A1 (de) | Beleuchtungssystem einer mikrolithographischen Projektionsbelichtungsanlage und Verfahren zur mikrolithographischen Projektion einer Maske | |
WO2018046350A1 (de) | Optisches system, insbesondere lithographieanlage, sowie verfahren | |
WO2022112061A1 (de) | Feldfacettensystem und lithographieanlage | |
DE102021213458A1 (de) | Projektionsbelichtungsanlage für die Halbleiterlithografie | |
DE102021202768A1 (de) | Facettensystem und lithographieanlage | |
DE102022203438B4 (de) | Optische Anordnung, optisches Modul, optische Abbildungseinrichtung und -verfahren, Verfahren zum Abstützen eines optischen Elements, mit aktiv verkippbarem optischem Element | |
DE102023205570A1 (de) | Optisches system und projektionsbelichtungsanlage | |
DE102023200329B3 (de) | Optische Baugruppe, Verfahren zur Montage der optischen Baugruppe und Projektionsbelichtungsanlage | |
DE102018216963A1 (de) | Vorrichtung und Verfahren zur Verstellung eines optischen Elements einer Projektionsbelichtungsanlage | |
WO2018177724A1 (de) | Optisches system sowie verfahren | |
DE102023208848A1 (de) | Beleuchtungssystem für eine lithographieanlage, lithographieanlage und verfahren zum betreiben eines beleuchtungssystems einer lithographieanlage | |
DE102021201689A1 (de) | Optische Baugruppe, Verfahren zur Deformation eines optischen Elements und Projektionsbelichtungsanlage | |
DE102022204580A1 (de) | Verfahren zum herstellen oder betreiben eines spiegels in einer lithographieanlage | |
DE102021214665A1 (de) | Projektionsbelichtungsanlage für die Halbleiterlithografie mit einer Temperierstruktur |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19711835 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20207028921 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2019711835 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2019711835 Country of ref document: EP Effective date: 20201015 |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19711835 Country of ref document: EP Kind code of ref document: A1 |