WO2016192959A1 - Optisches system einer mikrolithographischen projektionsbelichtungsanlage - Google Patents
Optisches system einer mikrolithographischen projektionsbelichtungsanlage Download PDFInfo
- Publication number
- WO2016192959A1 WO2016192959A1 PCT/EP2016/060851 EP2016060851W WO2016192959A1 WO 2016192959 A1 WO2016192959 A1 WO 2016192959A1 EP 2016060851 W EP2016060851 W EP 2016060851W WO 2016192959 A1 WO2016192959 A1 WO 2016192959A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical system
- projection exposure
- exposure apparatus
- projection
- arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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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
- G03F7/70058—Mask illumination systems
- G03F7/70066—Size and form of the illuminated area in the mask plane, e.g. reticle masking blades or blinds
-
- 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
- G03F7/70075—Homogenization of illumination intensity in the mask plane by using an integrator, e.g. fly's eye lens, facet mirror or glass rod, by using a diffusing optical element or by beam deflection
-
- 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
- G03F7/702—Reflective illumination, i.e. reflective optical elements other than folding mirrors, e.g. extreme ultraviolet [EUV] illumination systems
-
- 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 invention relates to an optical system of a microlithographic projection exposure apparatus.
- Microlithography is used to fabricate microstructured devices such as integrated circuits or LCDs.
- the microlithography process is carried out in a so-called projection exposure apparatus, which has an illumination device and a projection objective.
- reflec- tive optical elements are used as optical components for the imaging process due to the lack of availability of suitable light-transmissive refractive materials.
- EUV light sources are e.g. in the form of plasma light sources or free-electron laser (FEL) known.
- FEL free-electron laser
- a problem which in practice accompanies the increase in the light output of the EUV light source is that the screening of parts of the EUV light, which is inherently required in some areas within the projection exposure apparatus, results in an increase in heat input associated with the light output, which in turn is undesired thermal conditional deformations of the EUV mirrors (and, where appropriate, their holding devices).
- the aperture diaphragm which is typically used within the projection lens for aperture limitation, the reticle masking system used within the illumination device or the associated REMA diaphragms and, if appropriate, elements introduced to influence the intensity in the optical beam path are also worth mentioning.
- An optical system according to the invention of a microlithographic projection exposure apparatus wherein the projection exposure apparatus has a lighting device and a projection objective, and wherein light in a light tube runs during operation of the projection exposure apparatus from the entrance of the illumination device over the object plane of the projection objective to the image plane of the projection objective, comprises:
- At least one lamellar arrangement which has at least one reflective lamella; and - at least one beam trap;
- the lamellar arrangement is arranged such that it at least temporarily incident on the lamellar arrangement, not belonging to the Nutzlichtschlauch light during operation of the projection exposure system to at least one beam trap towards.
- Nutzlichtschlauch the lamellar arrangement
- adjustable or temporally variable diaphragms and the Nutzlichtschlauch is correspondingly temporally variable.
- the invention is based in particular on the concept of dissipating, within the projection exposure apparatus, the electromagnetic radiation which is not usable for the microlithographic imaging process at least partially using an additional component in the form of a lamination arrangement in such a way that this electromagnetic radiation leads to a likewise additionally provided beam trap is reflected.
- the invention includes the concept of at least predominantly bringing about absorption of the relevant electromagnetic radiation, which is not used for the microlithographic imaging process, only at a sufficient distance from the optical components - namely only at the location of the beam trap - by suitable design or orientation
- the lamellar arrangement at this lamellar arrangement itself at least predominantly reflection (and as little or no absorption as possible) takes place, as will be explained in more detail below.
- the invention includes the concept of partially relieving a diaphragm which is required within the projection exposure apparatus - for example in the form of an aperture diaphragm or a REMA diaphragm of a reticle masking system - of the radiation absorption to be provided by the relevant diaphragm, than the diaphragm in question only Radiation has to absorb, which has not already been deflected by the lamella arrangement according to the invention in the direction of the beam trap.
- the appropriate (eg Apertur- or REMA-) diaphragm with suitable placement of the fin assembly according to the invention for example, only intercept or absorb radiation, which only slightly outside the Nutzlichtschlauches, as comparatively further outside the Nutzlichtschlauches located electromagnetic radiation already reflected by the lamellar arrangement according to the invention and removed via the beam trap according to the invention.
- the optical system has at least one aperture, wherein the lamellar arrangement is arranged at a distance of less than 200 mm from this aperture.
- the diaphragm is an aperture diaphragm arranged in the projection objective for limiting the numerical aperture.
- the diaphragm is a REMA diaphragm of a reticle masking system (REMA) arranged in the illumination device.
- the REMA diaphragms of such a reticle masking system are dynamically moved in the microlithography process in a known manner in order to ensure that the electromagnetic radiation only strikes the part of the wafer currently to be exposed.
- a meandering movement of the wafer occurs, with the REMA apertures of the reticle masking system in phases of sideways movement of the wafer, e.g. be completely closed.
- the lamellar arrangement according to the invention has a plurality of reflective lamellae. This embodiment makes it possible to reflect different rays or components of the radiation located outside of the Nutzlichtschlauches and thus coupled out as far as possible with different lamellae of the lamellar arrangement or to deflect the beam trap, depending on the actual light distribution each optimal reflection conditions (while minimizing an undesirable Absorption by the respective fins) can be provided.
- the respective inclinations of the individual slats with respect to the optical system axis can be chosen to be suitably different in a suitable manner in order to realize the most effective reflection possible for the individual beams of the radiation located outside the useful light tube and thus to be coupled out to the beam trap according to the invention.
- parts of the radiation to be coupled out of the useful light tube miss the lamellar arrangement and can nevertheless cause undesirable heat input due to absorption of optical components in the system.
- at least one reflective lamella is arranged such that, during operation of the projection exposure apparatus, light impinges at least temporarily on an incident angle of at least 65 °, which is related to the surface normal.
- the lamella arrangement according to the invention is arranged to be movable. This makes it possible, in particular in the case of the above-described placement of the lamination arrangement according to the invention in the region of a REMA diaphragm of a reticle masking system, which Slat arrangement to move dynamically during the microlithography process and thus in particular to adapt to the respective setting of a (eg REMA) aperture.
- the at least one lamella of the fin arrangement according to the invention comprises a reflective layer of a layer material which is selected from the group comprising ruthenium, molybdenum, silicon, lanthanum, boron, boron carbide and rhodium.
- platinum metals not listed above (ie, palladium (Pd), osmium (Os), iridium (Ir), and platinum (Pt)) can be advantageously used.
- each of the slats may only an example, 30 nm-thick ruthenium layer on a suitable substrate (eg, a mirror substrate material such as the materials sold under the name ULE ® or Zerodur ®, made from quartz or based on mixtures of Silicon dioxide or silicon and cordierite or silicon carbide).
- a layer material is preferably selected which has the best possible chemical and mechanical stability (and in particular does not degrade under vacuum conditions), wherein it can be advantageously utilized that comparatively to the reflection layer to be set roughness requirements are uncritical or low (since the deflection of the radiation to be coupled out to the beam trap with comparatively low angular accuracy has to be done).
- the optical system is designed for a working wavelength of less than 30 nm, in particular less than 15 nm, more particularly less than 8 nm.
- the invention further relates to a microlithographic projection exposure apparatus having an illumination device and a projection objective, the projection exposure apparatus having an optical system with the features described above.
- Figure 1 a-b are schematic representations to explain the possible
- Figure 2-6 are schematic representations for explaining different
- FIG. 1 a firstly shows a schematic representation of an exemplary projection exposure system 10 designed for operation in the EUV.
- a lighting device of the projection exposure apparatus 10 has a field facet mirror 3 and a pupil facet mirror. mirror 4 on.
- the light of a light source unit which in the example comprises a plasma light source 1 and a collector mirror 2, directed.
- a first telescope mirror 5 and a second telescope mirror 6 are arranged in the light path after the pupil facet mirror 4.
- a reflective structure-carrying mask 31 is arranged on a mask table 30, which is imaged with the aid of the projection lens into an image plane in which a photosensitive layer (photoresist) -coated substrate 41 is located on a wafer table 40.
- the structure-bearing mask 31 is also called a reticle.
- the substrate 41 is also referred to as a wafer.
- the structure-carrying region of the mask 31 is generally larger than the object field of the projection objective, in particular it is more extensive along one direction.
- the exposure of the substrate 41 by scanning ie, mask table 30 and wafer table 40 and thus also mask 31 and substrate 41 are synchronized with each other method, the ratio of the respective speeds is determined by the magnification of the projection lens.
- the direction of travel is also referred to as the scan direction, and the extent of the object field along the scan direction is also referred to as the length of the scan slot.
- edge of the structure-carrying region on the mask 31 is reached during the scanning operation, it can be achieved by displaceable reticle masking diaphragms (REMA diaphragms) 32a, 32b that the non-structural region of the mask 31 does not contribute to the exposure of the substrate 41.
- displaceable reticle masking diaphragms (REMA diaphragms) 32a, 32b that the non-structural region of the mask 31 does not contribute to the exposure of the substrate 41.
- a coupling or removal of electromagnetic radiation or EUV light takes place at different positions as a matter of principle, which (s) is not suitable for the wafer exposure or would lead to an unwanted wafer exposure.
- decoupling takes place in particular via the REMA diaphragms 32a, 32b of a reticle masking system 32 in the immediate vicinity of the reticle 31.
- a coupling out takes place within the projection objective through an aperture stop 27 which is provided for limiting the aperture.
- the volume in which EUV radiation emitted by the plasma light source 1, which can contribute as intended to illuminate the image field of the projection objective of the projection exposure apparatus 10 and thus to expose the photosensitive layer on the substrate 40, is referred to as a useful light tube.
- the Nutzlichtschlauch is defined here in particular by apertures 27, 32a, 32b of the projection exposure apparatus 10. Are diaphragms adjustable or their position variable over time, so is the Nutzlichtschlauch correspondingly temporally variable.
- the aperture stop is arranged on the mirror 22, as indicated in FIG. 1 a for an aperture stop 27.
- other positions of the aperture stop are also possible, either on one of the other mirrors (with the exception of mirror 26) or between two mirrors, between which there is no intermediate image and the Nutzlichtschläuche are free of overlap, so for example. between mirrors 22 and 23 (as indicated in Fig. 1 b for an aperture 27 ').
- a lamellar arrangement with at least one reflective lamella is used to reflect electromagnetic radiation not required for the microlithographic imaging process (ie not belonging to the useful light tube) towards a jet trap which is likewise provided according to the invention, thus providing absorption and absorption concomitant transformation into heat only at a greater distance from the respective diaphragms or optical components, namely to take place only at the location of the respective beam trap.
- a jet trap can offer the advantage that it can be optimized specifically for heat removal from the system.
- Embodiments of the invention are first described below with reference to FIGS 2-4, in which the blade assembly according to the invention is arranged in the region of an aperture diaphragm (such as the aperture 27 in the projection lens of the projection exposure apparatus of FIGS. 1a-b).
- an aperture diaphragm such as the aperture 27 in the projection lens of the projection exposure apparatus of FIGS. 1a-b.
- FIG. 2 shows, in a merely schematic illustration, a section of a projection lens, wherein only two EUV mirrors 220 and 240 are shown.
- the term "205" designates a useful light tube which comprises those rays of the EUV light which contribute to the wafer exposure, that is, from the entrance of the illumination device via the object plane to the image plane of the projection objective.
- 2 exemplarily 5 for a beam "S" indicated - which does not deflect within the Nutzlichtschlauchs 205 extending electromagnetic radiation to a remote beam trap 250 out.
- EUV mirrors 220, 240 which would deform them).
- the lamellae 21 1, 212, ... different Neil s tions to the optical system axis.
- the respective angles of inclination of the individual lamellae 21 1, 212,... Can be selected taking into account the light distribution resulting during the operation of the projection lens in such a way that the largest possible proportion of the light output to be coupled out with the lamellae arrangement 210 as described above (ie not to the useful light).
- lamination arrangements 440 or 450 with a curvature or a kink may be provided to optionally reflect a light beam multiple times (and in this case, inter alia, to minimize absorption losses).
- FIG. 3 shows a diagrammatic illustration for explaining a further embodiment of the invention, components which are analogous or essentially functionally identical to FIG. 2 and have reference numbers increased by "100.”
- the aperture diaphragm 330 is shown in FIG in contrast to FIG. 2, in the immediate vicinity of one of the EUV mirrors (namely, the EUV mirror 340), the further EUV mirror 360 following the optical beam path on the EUV mirror 340 being shown here
- the use according to the invention of a lamellar arrangement (also shown in FIG. 3 and designated by "310") is thus not limited to a specific geometry but can be advantageously used in any configurations or beam paths within a projection exposure apparatus, the respective orientation of the reflective louvers 31 being as described above 1, 312,...
- lamination arrangement 310 as a function of concrete radiation course can be chosen so that on the one hand the most effective reflection of not belonging to the Nutzlichtschlauch electromagnetic radiation towards the inventive (not shown in Fig. 3) beam trap achieved and on the other hand, the mechanical or design effort is kept as low as possible.
- this reticle masking system comprises, in particular, two REMA diaphragms 531, 532 which are movable parallel to the scan direction (in the y coordinate direction in the drawn coordinate system) and two further, not shown (and the illuminated region on the reticle perpendicular thereto x-direction limiting and substantially fixed) REMA diaphragms.
- the REMA diaphragms 531, 532 correspond to the diaphragms 32a, 32b of FIG. 1 from.
- the panels 531, 532 are independently movable.
- each of the y-direction movable REMA diaphragms 531, 532 is associated with a fin arrangement 510 or 520 with fins 51 1, 512,...
- the slat arrangement 510 or 520 is preferably selected so that the angle between a slat and the normal of the Retik els 540 is greater than the numerical aperture (NA) at the reticle, i. the lamellae should not be too steep, as otherwise rays could strike both sides of the same lamella.
- the tips of the lamellae 51 1, 512,..., And 521, 522,... Of the lamination assembly 510, 520 are advantageously arranged so as to be at least approximately in line, whose angle is equal to the normal of the reticle 540 numerical aperture (NA) at the reticle. This makes it possible to place all the slats of a slat arrangement 510 or 520 in the vicinity of the Nutzlichtschlauches.
- the invention is not based on the above-described, continuous retraction of the fins 51 1, 512,... Or 521, 522, or the presence of two fin assemblies 510 and 520 shown in FIG. 5a-b limited.
- the above, not continuously taking in particular a single lamellar arrangement reduces the mechatronic effort and is particularly acceptable if the following condition is met:
- ⁇ is the numerical aperture of the illumination radiation in front of the reticle, d being the distance between the tip of the lamella closest to the reticle and the reticle and I being the length of the scan slot on the reticle, the product being 2 * ⁇ * d Expansion of the generated half shadow describes.
- the desirability of continuous retraction of the at least one fin array into the optical path depends on how large the penum shade produced by the fin array is in comparison to the total extent of the scan slot.
- the lamellae of the lamellar arrangement can not be driven in continuously (eg abruptly after the closed position of the REMA diaphragms has already been reached), without a relevant increase in the absorption on the REMA diaphragms, whereas a continuous increase in absorption Driving in of the lamellae into the optical beam path can be advantageous if the extent of the half shadow produced by the lamella arrangement is comparatively small relative to the length of the scan slot.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201680029150.2A CN107810445B (zh) | 2015-06-01 | 2016-05-13 | 一种微光刻投射曝光设备的光学系统 |
| KR1020177034387A KR102559786B1 (ko) | 2015-06-01 | 2016-05-13 | 마이크로리소그래픽 투영 노광 장치의 광학계 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015210041.3 | 2015-06-01 | ||
| DE102015210041.3A DE102015210041A1 (de) | 2015-06-01 | 2015-06-01 | Optisches System einer mikrolithographischen Projektionsbelichtungsanlage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016192959A1 true WO2016192959A1 (de) | 2016-12-08 |
Family
ID=56087241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2016/060851 Ceased WO2016192959A1 (de) | 2015-06-01 | 2016-05-13 | Optisches system einer mikrolithographischen projektionsbelichtungsanlage |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR102559786B1 (de) |
| CN (1) | CN107810445B (de) |
| DE (1) | DE102015210041A1 (de) |
| WO (1) | WO2016192959A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022213143A1 (de) | 2022-12-06 | 2024-06-06 | Carl Zeiss Smt Gmbh | Spiegelanordnung zur Absorption von Strahlung und Lithographiesystem |
| WO2025108821A2 (en) | 2023-11-21 | 2025-05-30 | Carl Zeiss Smt Gmbh | Imaging optical unit for imaging an object field into an image field, and projection exposure apparatus having such an imaging optical unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050270513A1 (en) * | 2002-03-18 | 2005-12-08 | Asml Netherlands B.V. | Lithographic apparatus and device manufacturing method |
| US20120075610A1 (en) * | 2009-06-09 | 2012-03-29 | Asml Netherlands B.V. | Lithographic apparatus and method for reducing stray radiation |
| WO2012041341A1 (en) | 2010-09-30 | 2012-04-05 | Carl Zeiss Smt Gmbh | Projection exposure system and projection exposure method |
| DE102011075465A1 (de) * | 2011-05-06 | 2012-11-08 | Carl Zeiss Smt Gmbh | Projektionsobjektiv einer mikrolithographischen Projektionsbelichtungsanlage |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3311319B2 (ja) * | 1998-10-02 | 2002-08-05 | キヤノン株式会社 | 光学ユニット、光学ユニットを用いた光学機器 |
| JP4099423B2 (ja) * | 2002-03-18 | 2008-06-11 | エーエスエムエル ネザーランズ ビー.ブイ. | リソグラフィ装置およびデバイス製造法 |
| JP4218475B2 (ja) | 2003-09-11 | 2009-02-04 | 株式会社ニコン | 極端紫外線光学系及び露光装置 |
| JP5119681B2 (ja) | 2007-02-22 | 2013-01-16 | 株式会社ニコン | 露光装置及びデバイス製造方法 |
| US8081296B2 (en) | 2007-08-09 | 2011-12-20 | Nikon Corporation | Illumination optical apparatus, exposure apparatus, and device manufacturing method |
| CN101770317B (zh) * | 2010-03-16 | 2015-11-25 | 南京方瑞科技有限公司 | 触摸电子白板 |
-
2015
- 2015-06-01 DE DE102015210041.3A patent/DE102015210041A1/de not_active Withdrawn
-
2016
- 2016-05-13 WO PCT/EP2016/060851 patent/WO2016192959A1/de not_active Ceased
- 2016-05-13 KR KR1020177034387A patent/KR102559786B1/ko active Active
- 2016-05-13 CN CN201680029150.2A patent/CN107810445B/zh active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050270513A1 (en) * | 2002-03-18 | 2005-12-08 | Asml Netherlands B.V. | Lithographic apparatus and device manufacturing method |
| US20120075610A1 (en) * | 2009-06-09 | 2012-03-29 | Asml Netherlands B.V. | Lithographic apparatus and method for reducing stray radiation |
| WO2012041341A1 (en) | 2010-09-30 | 2012-04-05 | Carl Zeiss Smt Gmbh | Projection exposure system and projection exposure method |
| DE102011075465A1 (de) * | 2011-05-06 | 2012-11-08 | Carl Zeiss Smt Gmbh | Projektionsobjektiv einer mikrolithographischen Projektionsbelichtungsanlage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107810445B (zh) | 2021-07-20 |
| KR20180013933A (ko) | 2018-02-07 |
| CN107810445A (zh) | 2018-03-16 |
| DE102015210041A1 (de) | 2016-12-01 |
| KR102559786B1 (ko) | 2023-07-26 |
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