EP1532485A2 - Dispositif pour rendre etanche un dispositif d'eclairage par projection - Google Patents

Dispositif pour rendre etanche un dispositif d'eclairage par projection

Info

Publication number
EP1532485A2
EP1532485A2 EP03755549A EP03755549A EP1532485A2 EP 1532485 A2 EP1532485 A2 EP 1532485A2 EP 03755549 A EP03755549 A EP 03755549A EP 03755549 A EP03755549 A EP 03755549A EP 1532485 A2 EP1532485 A2 EP 1532485A2
Authority
EP
European Patent Office
Prior art keywords
gas
gas distributor
projection
distributor device
reticle
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.)
Withdrawn
Application number
EP03755549A
Other languages
German (de)
English (en)
Inventor
Albrecht Hof
Günter Maul
Lothar Gail
Wilfried Schierholz
Eberhard Jost
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss SMT GmbH
Original Assignee
Carl Zeiss SMT GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Zeiss SMT GmbH filed Critical Carl Zeiss SMT GmbH
Publication of EP1532485A2 publication Critical patent/EP1532485A2/fr
Withdrawn legal-status Critical Current

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
    • 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
    • G03F7/70908—Hygiene, e.g. preventing apparatus pollution, mitigating effect of pollution or removing pollutants from apparatus
    • G03F7/70933—Purge, e.g. exchanging fluid or gas to remove pollutants
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • 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
    • G03F7/20—Exposure; Apparatus therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/70—Microphotolithographic exposure; Apparatus therefor
    • G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
    • G03F7/70808—Construction details, e.g. housing, load-lock, seals or windows for passing light in or out of apparatus

Definitions

  • the invention relates to a device for sealing a projection exposure system with an illumination system, a reticle, a projection objective and an imaging plane, wherein there are intermediate spaces between the individual elements that are open to the environment.
  • Such a device is known from EP 0 886 184.
  • a vacuum-operated arrangement which is arranged between an afer and an optical element, is shown.
  • the arrangement has an illumination field opening in the middle, with a minimal upper gap between a lens surface and a further minimal gap between a wafer surface.
  • the gas flow is introduced above and below this arrangement and exits again through gap-shaped openings within the arrangement. This removes dirt, especially dust, from the lens surface.
  • the present invention has for its object to provide a device which in the critical areas of the projection exposure system neither absorbs nor disturbs the radiation present there to a high degree.
  • a gas distributor device through which nitrogen or noble gas flows is arranged in at least one of the intermediate spaces, the gas distributor device having a shape and size such that one or more intermediate spaces is at least largely sealed off from the surroundings surrounding the projection exposure system.
  • the area between a projection lens and an imaging plane with a corresponding device is largely known as a so-called Containment sealed, the sealing being carried out without contact.
  • a protective gas atmosphere must accordingly be created, nitrogen or a noble gas being used as the protective gas. This gas has a low degree of absorption for the radiation used.
  • the use of pure nitrogen as a protective gas ensures that the radiation of the wavelength of 157 nm strikes a substrate coated with photosensitive materials without losses and thus the last surface of the projection lens also remains free of interfering substances.
  • gas exchange device is provided with at least one gas supply device and at least one gas discharge device, wherein the inflow cross section for introducing the nitrogen or the noble gas can be made larger than the outlet cross section, wherein the at least one gas supply device can be designed as a hollow nozzle and gap seals can be provided for gas removal.
  • the not very tight containments are constantly filled with the gas through the hollow nozzles, which flows out again at the gap seals.
  • the gaps must overlap and be matched with the amount of gas flowing in so that no foreign gas can diffuse in or external currents can penetrate. There is advantageously a slight overpressure in the inner region of the gas distributor device.
  • a second solution according to the invention provides that a gas distributor device can also be provided in the area between the illumination and the reticle, lamellar gap seals being provided here for gas removal, the gap seals being ring-shaped and the lamellar gap seals being mutually displaceable.
  • the lamella composite also serves as a seal against the environment.
  • the gas flows into this area through inlet nozzles and flows out through the lamellae, each of which represents a seal via a gap seal.
  • the plates should advantageously have a sufficiently large length so that when the reticle is moved, an overlap of the two plates is ensured to seal the rinsed area.
  • FIG. 1 shows a schematic diagram of a projection exposure system for microlithography, which can be used to expose structures on wafers coated with photosensitive materials;
  • FIG. 2 shows a longitudinal section of a gas distributor device which is arranged between a projection objective and a wafer
  • FIG. 3 shows a longitudinal section of a gas distributor device which is arranged between an illumination device, a reticle and a projection objective;
  • FIG. 4 shows a view of the device shown in FIG. 3, the reticle being pivoted out relative to the illumination and the projection objective.
  • FIG. 1 shows a projection exposure system 1, which is basically known in this way from US Pat. No. 5,638,223 and US Pat. No. 6,252,712, the contents of which are recorded in full. The basic functioning of such a system is therefore assumed to be known. For this reason, only the parts essential to the invention are described in more detail below.
  • Such systems are used for the exposure of structures on a substrate coated with photosensitive materials, which generally consists predominantly of silicon and is referred to as wafer 2, for the production of semiconductor components.
  • the projection exposure system 1 essentially consists of an illumination device 3, a so-called reticle 5, by means of which the later structures on the wafer 2 are determined, and an imaging device, namely a projection lens 7.
  • the basic functional principle provides that structures introduced into the reticle 5 on the wafer 2 are exposed with a reduction in the size of the structures.
  • the wafer 2 is moved further in the x and y directions over carriages 26, which are firmly connected to the overall device 27, so that on the same wafer 2 a large number of individual fields, each with the one specified by the reticle 5 Structure are exposed.
  • a linear guide 25 of the wafer 2 in the z direction is also ensured.
  • the illumination device 3 provides a projection beam 4 required for imaging the reticle 5 on the wafer 2.
  • the radiation is shaped in the illumination device 3 via optical elements so that the projection beam 4 has the desired properties with regard to diameter, polarization, shape of the wavefront and the like when it hits the reticle 5.
  • An image of the reticle 5 is generated via the projection beam 4 and transferred to the wafer 2 in a correspondingly reduced size by the projection objective 7.
  • FIG. 2 shows a basic structure of a gas distributor device 8.
  • An annular inflow nozzle 10 is preferably installed in the space between the projection objective 7 and the wafer 2, which allows the gas 23 to flow laminarly into the cylindrical gas distributor device 8.
  • the nozzle 10 can also be segmented over the circumference, so that the gas supply can be controlled more finely.
  • the purging takes place in the purging area 13. Since the required radiation must have a high energy in the purging area 13, purging with nitrogen or an inert gas 23, in particular helium, prevents certain gases, in particular air, from absorbing the radiation , are located in the blasting chamber 13.
  • the gaps 11 and 11 ' should be ⁇ 1 mm wide.
  • the blown-in pure nitrogen or the noble gas 23 flows through the gaps 11 and 11 'into the surroundings or into suction devices which may have been set
  • the gaps 11 and 11 'must have sufficiently large lengths so that no foreign or ambient gas can diffuse into them.
  • the inflowing amount of gas 23 through the nozzles 10 must be greater than the outflowing amount of gas 23 through the gaps 11 and 11 '.
  • the gas inlet cross section can accordingly be made slightly larger than the gas outlet cross section in order to achieve a correct ratio of the flow velocity. This creates a slight excess pressure in the gas distribution device 8.
  • the tendency to build up in the center of the nozzle 10 and thus on an optical and mechanical axis 19 is avoided by small, always present asymmetries.
  • the distances between columns 11 and 11 ' are usually different. It is also possible for one of the gaps, preferably the upper gap 11, to be set to 0 mm.
  • the nozzle 10 is then sealed directly, without a microscopic gap. generate, attached to the projection lens 7, which leads to only one gap 11 '.
  • the gas distributor device 8 is provided with bearings 18.
  • the bearings 18 are located on a bearing holder on a machine device 27, which is not shown in detail here, the wafer 2 also being mounted on the bearing holder 27.
  • the bearings 18 are required so that the gas distribution device 8 is not moved when the wafer 2 is moved.
  • FIG. 3 shows a gas distributor device 8 'which includes the reticle 5.
  • the gas is also supplied here via annular nozzles 10.
  • the gas 23 flows through the nozzles 10 into the intermediate area between the reticle 5 and the illumination device 3, as well as into the intermediate area between the reticle 5 and the projection lens 7.
  • At the top of the gas distributor device 8 ' there is a lamella composite 14.
  • the gas 23 flows through the lamellae, each of which represents a seal via a gap seal.
  • the lamella composite 14 consists in each case of a plurality of lamellae 14 ′ stacked one above the other, which are designed as flat rings and are provided with a hole in the center, so that the radiation can strike the reticle 5 unhindered.
  • the slats 14 ' are made of metallic materials which withstand the radiation exposure.
  • the lamellae 14 '' are kept at a constant gap distance on balls and magnets 17 which work on soft iron inserts.
  • the gas 23 located in the gas distributor device 8 can escape through the lamella composite 14, in particular through the respective gaps between the lamellas 14 ', and through the gaps 20'.
  • the gas 23 flows within the gas distributor device 8 ′ from the upper area of the reticle 5 into the lower area of the reticle 5, the reticle 5 being supported on a three-point support 9 at the outer ends on an inner frame 24.
  • the gas distributor device 8 ′ terminates at the lower area with an end plate 16.
  • an upper projection objective end plate 15 is firmly connected to the projection objective 7. This arrangement was chosen because there is only a very limited installation space available in this area.
  • the plates 15 and 16 are ring-shaped, in each case in the middle of these plates 15 and 16 there are sufficiently large openings for the beam passage, and these Plates 15 and 16 are mutually displaceable.
  • the reticle 5 is pulled out as far as the entire device, there must still be a sufficiently large overlap of the two plates 15 and 16, in particular half the length, so that 5 contaminated gas never enters the flushed area.
  • the inner frame 24, on which the reticle 5 is mounted, is opposite the gas distributor device 8 ', the lamella composite 14 and the outer frame 28 in the z direction via
  • annular gaps 20 with different diameters in width and length must have a certain ratio.
  • the gap length to the gap height should always have a size ratio of
  • the advantage of this arrangement is that the room remains largely free of fixtures in addition to the lighting and can be used for measuring technology for stage positioning.
  • FIG. 4 shows a gas distribution device 8 'which is swiveled out. If the reticle 5 is displaced in the x ⁇ and y direction with respect to the illumination device 3 and the projection lens 7 by the slide 26, the lamella composite 14 is deflected.
  • the gas is also supplied here via the ring-shaped hollow nozzle 10.
  • the nitrogen or the noble gas 23 flows out through the sealing gaps of the fins 14 'and the gaps 20, 20', 20 '', 21 and cannot pass through one here either Suction device shown in detail can be removed.
  • a displacement of the reticle 5 is necessary so that a large number of individual fields, each with the structure predetermined by the reticle 5, are exposed on the wafer 2.
  • the disruptive gases should be removed within a few tenths of a second. The gas consumption required for this should be kept low.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)

Abstract

Selon l'invention, un dispositif d'éclairage par projection (1) comprend un système d'éclairage (3), un réticule (5), un objectif de projection (7) et un plan de représentation. Entre les éléments individuels se trouvent respectivement des interstices ouverts vers l'extérieur, un système de répartition de gaz (8,8') parcouru par du gaz noble ou de l'azote, se trouvant dans au moins l'un des interstices. Le système de répartition de gaz (8,8') a une forme et une taille qui permettent de rendre étanches au moins dans une large mesure un ou plusieurs interstices vis-à-vis de l'environnement extérieur qui entoure le dispositif d'éclairage par projection (1).
EP03755549A 2002-08-28 2003-08-26 Dispositif pour rendre etanche un dispositif d'eclairage par projection Withdrawn EP1532485A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10239344 2002-08-28
DE10239344A DE10239344A1 (de) 2002-08-28 2002-08-28 Vorrichtung zum Abdichten einer Projektionsbelichtungsanlage
PCT/EP2003/009427 WO2004025368A2 (fr) 2002-08-28 2003-08-26 Dispositif pour rendre etanche un dispositif d'eclairage par projection

Publications (1)

Publication Number Publication Date
EP1532485A2 true EP1532485A2 (fr) 2005-05-25

Family

ID=31502005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03755549A Withdrawn EP1532485A2 (fr) 2002-08-28 2003-08-26 Dispositif pour rendre etanche un dispositif d'eclairage par projection

Country Status (8)

Country Link
US (1) US7130017B2 (fr)
EP (1) EP1532485A2 (fr)
JP (1) JP2006515954A (fr)
KR (1) KR20050044800A (fr)
CN (1) CN1695094A (fr)
AU (1) AU2003273394A1 (fr)
DE (1) DE10239344A1 (fr)
WO (1) WO2004025368A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7072021B2 (en) * 2004-05-17 2006-07-04 Asml Netherlands B.V. Lithographic apparatus and device manufacturing method
NL2008345A (en) * 2011-03-28 2012-10-01 Asml Holding Nv Lithographic apparatus and device manufacturing method.
CN107111249A (zh) * 2014-12-31 2017-08-29 Asml控股股份有限公司 具有图案化装置环境的光刻设备
DE102015219671A1 (de) * 2015-10-12 2017-04-27 Carl Zeiss Smt Gmbh Optische Baugruppe, Projektionssystem, Metrologiesystem und EUV-Lithographieanlage
WO2019020450A1 (fr) 2017-07-28 2019-01-31 Asml Netherlands B.V. Systèmes et méthodes de suppression de particules
US11204558B2 (en) 2017-07-28 2021-12-21 Asml Netherlands B.V. Particle suppression systems and methods

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
JP3127511B2 (ja) * 1991-09-19 2001-01-29 株式会社日立製作所 露光装置および半導体装置の製造方法
JPH0786152A (ja) 1993-09-14 1995-03-31 Nikon Corp 投影露光装置
IL133422A0 (en) * 1997-06-10 2001-04-30 Nikon Corp Optical device, method of cleaning the same, projection aligner, and method of producing the same
US5973764A (en) * 1997-06-19 1999-10-26 Svg Lithography Systems, Inc. Vacuum assisted debris removal system
DE19807120A1 (de) 1998-02-20 1999-08-26 Zeiss Carl Fa Optisches System mit Polarisationskompensator
US6933513B2 (en) * 1999-11-05 2005-08-23 Asml Netherlands B.V. Gas flushing system for use in lithographic apparatus
EP1279070B1 (fr) * 2000-05-03 2007-10-03 ASML Holding N.V. Appareil pour fournir un chemin optique purgé dans un système de lithographie par projection ainsi qu'une méthode correspondante
JP2002151400A (ja) * 2000-11-15 2002-05-24 Canon Inc 露光装置、その保守方法並びに同装置を用いた半導体デバイス製造方法及び半導体製造工場
US20020159042A1 (en) * 2001-04-25 2002-10-31 Poon Alex Ka Tim Chamber assembly for an exposure apparatus
JP2002373852A (ja) * 2001-06-15 2002-12-26 Canon Inc 露光装置
US6867844B2 (en) * 2003-06-19 2005-03-15 Asml Holding N.V. Immersion photolithography system and method using microchannel nozzles

Non-Patent Citations (1)

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Title
See references of WO2004025368A2 *

Also Published As

Publication number Publication date
AU2003273394A1 (en) 2004-04-30
CN1695094A (zh) 2005-11-09
DE10239344A1 (de) 2004-03-11
KR20050044800A (ko) 2005-05-12
WO2004025368A3 (fr) 2004-09-23
US7130017B2 (en) 2006-10-31
WO2004025368A2 (fr) 2004-03-25
JP2006515954A (ja) 2006-06-08
US20050206860A1 (en) 2005-09-22

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