Source: https://patents.google.com/patent/TWI658335B/en
Timestamp: 2020-07-05 10:39:29
Document Index: 331915374

Matched Legal Cases: ['Application No. 61', 'Application No. 13', 'art 1', 'art 2', 'art 3', 'art 3', 'art 213', 'application No. 21', 'application No. 35', 'application No. 40', 'application No. 40']

TWI658335B - Liquid immersion member, exposure apparatus, exposure method, device fabricating method, program, and recording medium - Google Patents
TWI658335B
TWI658335B TW106132812A TW106132812A TWI658335B TW I658335 B TWI658335 B TW I658335B TW 106132812 A TW106132812 A TW 106132812A TW 106132812 A TW106132812 A TW 106132812A TW I658335 B TWI658335 B TW I658335B
TW106132812A
TW201804261A (en
2012-04-10 Priority to US61/622,235 priority
2013-03-11 Priority to US13/793,667 priority
2013-03-19 Application filed by 日商尼康股份有限公司 filed Critical 日商尼康股份有限公司
2018-02-01 Publication of TW201804261A publication Critical patent/TW201804261A/en
2019-05-01 Publication of TWI658335B publication Critical patent/TWI658335B/en
239000007788 liquids Substances 0.000 title claims abstract description 296
238000007654 immersion Methods 0.000 title claims abstract description 165
239000000758 substrates Substances 0.000 claims description 322
The liquid immersion member of the present invention is a liquid immersion space in which the light path of the exposure light emitted from the exit surface of the optical member is filled with liquid on an object capable of moving under the optical member. The liquid immersion member includes a first member disposed at least a part of the periphery of the optical member, and a second member capable of moving outside at least a portion of the first member and having a recovery port for recovering at least a portion of the liquid in the liquid immersion space.
Liquid immersion member, exposure device, exposure method, device manufacturing method, program, and recording medium
The present invention relates to a liquid immersion member, an exposure device, an exposure method, a device manufacturing method, a program, and a recording medium.
This application claims the priority of US Patent Provisional Application No. 61 / 622,235 filed on April 10, 2012 and US Patent Application No. 13 / 793,667 filed on March 11, 2013, and incorporates the contents thereof.
Among the exposure apparatuses used in the lithography process, there is, for example, a liquid immersion exposure apparatus which discloses a substrate through which light is exposed through the liquid as disclosed in the following patent documents.
[Patent Document 1] US Patent No. 7862292
In a liquid immersion exposure apparatus, for example, when liquid flows out from a predetermined space or remains on an object such as a substrate, a poor exposure may occur. As a result, a defective element may be generated.
An aspect of the present invention is to provide a method capable of suppressing the occurrence of poor exposure. Liquid immersion member, exposure device and exposure method. In addition, an aspect of the present invention is to provide a component manufacturing method, a program, and a recording medium capable of suppressing the occurrence of defective components.
According to a first aspect of the present invention, a liquid immersion member is provided, which forms a liquid immersion space on an object capable of moving under the optical member in such a manner that the light path of the exposure light emitted from the exit surface of the optical member is filled with liquid. The first member is provided at least a part of the periphery of the optical member, and the second member is movable under the first member through the gap with the first member and has at least a liquid for recovering the liquid immersion space. Part of the recovery mouth.
According to a second aspect of the present invention, a liquid immersion member is provided, which forms a liquid immersion space on an object that can move below the optical member in such a manner that the light path of the exposure light emitted from the exit surface of the optical member is filled with liquid. The first member is disposed at least a part of the periphery of the optical member, and the second member is movable relative to the optical path of the exposure light outside at least a part of the first member, and has a liquid for recovering the liquid immersion space. At least part of the recovery port.
According to a third aspect of the present invention, there is provided an exposure device which exposes a substrate through exposure liquid with exposure light, and includes a liquid immersion member of the first aspect.
According to a fourth aspect of the present invention, there is provided a device manufacturing method including: an operation of exposing a substrate using an exposure device of any of the first to third aspects; and an operation of developing the substrate after the exposure.
According to a fifth aspect of the present invention, there is provided an exposure method for exposing a substrate with light for exposure through a liquid, including: forming a liquid-immersed space in which a light path of the light for exposure emitted from an exit surface of an optical member is filled with the liquid An operation of exposing the substrate through the liquid in the liquid immersion space to expose the substrate with the exposure light emitted from the exit surface; and an operation of moving a second member, the second The member is provided with a recovery port for recovering at least a portion of the liquid in the liquid immersion space, with the first member disposed at least a portion of the periphery of the optical member under the first member via a gap.
According to a sixth aspect of the present invention, there is provided a device manufacturing method including an operation of exposing a substrate using the exposure method of the fifth aspect and an operation of developing the substrate after exposure.
According to a seventh aspect of the present invention, there is provided a program for causing a computer to control an exposure device that exposes a substrate through exposure liquid with exposure light, including: forming a light path of the exposure light emitted from an exit surface of an optical member by the liquid An operation of filling a liquid immersion space; an operation of exposing the substrate through the liquid in the liquid immersion space with the exposure light emitted from the exit surface; and an operation of moving a second member, the second member being arranged in the A first member of at least a part of the periphery of the optical member is disposed below the first member via a gap and has a recovery port for recovering at least a part of the liquid in the liquid immersion space.
An eighth aspect of the present invention provides a computer-readable recording medium having recorded the program of the seventh aspect.
According to the aspect of the present invention, it is possible to suppress the occurrence of poor exposure. In addition, according to the aspect of the present invention, the occurrence of defective components can be suppressed.
1‧‧‧Mask stage
2. 2001, 2002‧‧‧ substrate stage
2C‧‧‧Motor of the driving system 15
3‧‧‧ measuring stage
3C‧‧‧Motor of the driving system 15
4‧‧‧ measuring system
5‧‧‧Liquid immersion component
6‧‧‧Control device
7‧‧‧Memory device
8A‧‧‧ benchmark frame
8B‧‧‧device frame
9‧‧‧ chamber device
10‧‧‧Anti-vibration device
11‧‧‧Drive System
12‧‧‧ shoot out
13‧‧‧terminal optics
14‧‧‧ base member
14G‧‧‧Guiding surface of base member
14M‧‧‧Driver 15 Fixture
15‧‧‧Drive System
16‧‧‧ Outer surface of terminal optics
21‧‧‧The first component
21B‧‧‧ Below
21C‧‧‧Inside
21D‧‧‧ Outside
21E‧‧‧above
21G‧‧‧Guide plane
21H‧‧‧Open
211‧‧‧Part 1
212‧‧‧Part 2
213‧‧‧Part 3
22, 222, 223‧‧‧ 2nd component
22A‧‧‧moving surface
22B‧‧‧ Below
22C‧‧‧Inside
22D‧‧‧ Outside
223S‧‧‧Space
23‧‧‧ supply port
24‧‧‧ Recovery port
25‧‧‧ porous member
253‧‧‧ Mesh Panel
253A‧‧‧above
Below 253B‧‧‧
254‧‧‧base member
26, 264, 265‧‧‧ opening
30‧‧‧Inhibition Department
31‧‧‧ film
32‧‧‧Gas supply department
33‧‧‧air supply port
34‧‧‧ exhaust port
35‧‧‧ opening
40‧‧‧Drive system
40C‧‧‧Connecting components
41‧‧‧The first actuator
42‧‧‧ 2nd actuator
50‧‧‧ support device
CS‧‧‧ Space
d1 ~ d4‧‧‧position
e1 ~ e4‧‧‧location
EL‧‧‧Exposure light
IL‧‧‧Lighting Department
IR‧‧‧ Illumination area
K‧‧‧Light Road
LG1, LG2, LG3 (LG) ‧‧‧ 1st, 2nd, 3rd interface
LQ‧‧‧Liquid
LS‧‧‧Liquid immersion space
M‧‧‧Photomask
P‧‧‧ substrate
PR‧‧‧ projection area
Sa, Sb‧‧‧irradiated area
T‧‧‧ cover member
Tn1 ~ Tn4‧‧‧path
Tp1 ~ Tp4‧‧‧path
FIG. 1 is a diagram showing an example of an exposure apparatus according to the first embodiment.
Fig. 2 is a side sectional view showing an example of a liquid immersion member according to the first embodiment.
Fig. 3 is a view of the liquid immersion member according to the first embodiment as viewed from below.
Fig. 4 is a side sectional view showing a part of the liquid immersion member according to the first embodiment.
Fig. 5 is a diagram showing an operation example of the liquid immersion member according to the first embodiment.
FIG. 6 is a diagram showing an operation example of the liquid immersion member according to the first embodiment.
FIG. 7 is a diagram for explaining an operation example of the exposure apparatus according to the first embodiment.
FIG. 8 is a schematic diagram for explaining an operation example of the exposure apparatus according to the first embodiment.
Fig. 9 is a schematic diagram for explaining an operation example of the liquid immersion member according to the first embodiment.
Fig. 10 is a schematic diagram for explaining an operation example of the liquid immersion member according to the first embodiment.
FIG. 11 is a diagram for explaining an example of a speed profile.
FIG. 12 is a diagram for explaining an example of a speed profile.
FIG. 13 is a schematic diagram for explaining an operation example of the exposure apparatus according to the first embodiment.
Fig. 14 is a side sectional view showing an example of a liquid immersion member according to a second embodiment.
Fig. 15 is a side sectional view showing an example of a liquid immersion member according to a third embodiment.
Fig. 16 is a view of a liquid immersion member according to a fourth embodiment as viewed from below.
Fig. 17 is a view of a liquid immersion member according to a fifth embodiment as viewed from below.
FIG. 18 is a diagram showing an example of a substrate stage.
FIG. 19 is a flowchart for explaining an example of a method for manufacturing a device.
Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. In the following description, an XYZ orthogonal coordinate system is set, and the positional relationship of each part will be described with reference to this XYZ orthogonal coordinate system. The set direction in the horizontal plane is the X-axis direction, the direction orthogonal to the X-axis direction in the horizontal plane is the Y-axis direction, and the directions orthogonal to the X-axis direction and the Y-axis direction (that is, vertical directions) are the Z-axis. direction. In addition, the directions of rotation (tilt) around the X-axis, Y-axis, and Z-axis are θX, θY, and θZ directions, respectively.
First, the first embodiment will be described. FIG. 1 is a schematic configuration diagram showing an example of an exposure apparatus EX according to the first embodiment. The exposure apparatus EX of this embodiment is a liquid immersion exposure apparatus that exposes the substrate P through the liquid LQ and the exposure light EL. In this embodiment, a liquid immersion space LS is formed in which the optical path of the exposure light EL is filled with the liquid LQ. A liquid immersion space is a portion (space, area) filled with liquid. The substrate P is exposed through the liquid LQ in the liquid immersion space LS with the exposure light EL. In this embodiment, water (pure water) is used as the liquid LQ.
The exposure apparatus EX of this embodiment is an exposure apparatus including a substrate stage and a measurement stage as disclosed in, for example, US Pat. No. 6,897,963 and European Patent Publication No. 1713113.
In FIG. 1, the exposure device EX includes a mask stage 1 capable of holding the movement of the mask M 1, a substrate stage capable of holding the movement of the substrate P 2, a measurement member capable of mounting the exposure light EL without the substrate P, and Measurement stage 3 for measuring device movement, measurement system for measuring substrate stage 2 and position of measurement stage 4, illumination system IL for illuminating mask M with exposure light EL, and mask for illuminating exposure light EL The image of the pattern of M is projected onto the substrate P by the projection optical system PL, the liquid immersion member 5 forming the liquid immersion space LS, the control device 6 that controls the overall operation of the exposure device EX, and the control device 6 connected to the control device 6 to store exposure-related information. 7. Various kinds of information storage device 7.
The exposure device EX also includes a reference frame 8A that supports the projection optical system PL and various measurement systems including the measurement system 4, a device frame 8B that supports the reference frame 8A, and is disposed between the reference frame 8A and the device frame 8B for suppression. The vibration is transmitted from the device frame 8B to the vibration isolation device 10 of the reference frame 8A, and the chamber device 9 that adjusts the environment (at least one of temperature, humidity, pressure, and cleanliness) of the space CS in which the exposure light EL travels. For space CS, at least A projection optical system PL, a liquid immersion member 5, a substrate stage 2 and a measurement stage 3 are placed. In this embodiment, at least a part of the mask stage 1 and the lighting system IL are also arranged in the space CS. The vibration isolation device 10 includes a spring device and the like. In the present embodiment, the vibration isolator 10 includes a gas spring (for example, an air mount). In addition, a detection system that detects an alignment mark on the substrate P, or a detection system that detects the surface position of an object such as the substrate P may be supported on the reference frame 8A.
The photomask M includes a reticle on which an element pattern to be projected onto the substrate P is formed. The photomask M includes a transmissive photomask having a transparent plate such as a glass plate and a pattern formed using a light-shielding material such as chromium on the transparent plate. As the photomask M, a reflective photomask may be used.
The substrate P is a substrate for manufacturing an element. The substrate P includes a substrate such as a semiconductor wafer and a photosensitive film formed on the substrate. The photosensitive film is a film of a photosensitive material (photoresist photoresist). The substrate P may include other films in addition to the photosensitive film. For example, the substrate P may include an antireflection film, or a protective film (topcoat film) that protects the photosensitive film.
The illumination system IL irradiates the exposure light EL to a predetermined illumination area IR. The illumination area IR includes a position where the exposure light EL emitted from the illumination system IL can be irradiated. The illumination system IL illuminates at least a part of the mask M arranged in the illumination region IR with the exposure light EL with a uniform illuminance distribution. The exposure light EL emitted from the illumination system IL uses far-ultraviolet light (DUV light) such as glow lines (g-line, h-line, i-line) emitted from a mercury lamp, KrF excimer laser light (wavelength 248 nm), and ArF light. Vacuum ultraviolet light (VUV light), such as molecular laser light (wavelength 193nm) and F 2 laser light (wavelength 157nm). In this embodiment, the exposure light EL uses ArF excimer laser light of ultraviolet light (vacuum ultraviolet light).
The photomask stage 1 can be moved while holding the photomask M. Photomask stage 1 is a drive system including a planar motor as disclosed in, for example, U.S. Patent No. 6,452,292. Move. In this embodiment, the photomask stage 1 can be moved in six directions of the X-axis, Y-axis, Z-axis, θX, θY, and θZ directions by the operation of the drive system. The drive system 11 may not include a planar motor. For example, the drive system 11 may include a linear motor.
The projection optical system PL irradiates the exposure light EL to a predetermined projection area PR. The projection region PR includes a position to which the exposure light EL emitted from the projection optical system PL can be irradiated. The projection optical system PL projects a pattern image of the mask M onto at least a part of the substrate P disposed in the projection area PR at a predetermined projection magnification. The projection optical system PL of this embodiment is a reduction system in which the projection magnification is, for example, 1/4, 1/5, or 1/8. Of course, the projection optical system PL may be any of the equal magnification system and the magnification system. In this embodiment, the optical axis of the projection optical system PL is parallel to the Z axis. The projection optical system PL may be any of a refractive system that does not include a reflective optical element, a reflective system that does not include a refractive optical element, or a reflective refractive system that includes a reflective optical element and a refractive optical element.
The projection optical system PL includes a terminal optical element 13 having an emission surface 12 from which the exposure light EL is emitted. The emitting surface 12 emits the exposure light EL toward the image plane of the projection optical system PL. The terminal optical element 13 is an optical element closest to the image plane of the projection optical system PL among the plurality of optical elements of the projection optical system PL. The projection area PR includes a position to which the exposure light EL emitted from the emission surface 12 can be irradiated. In this embodiment, the emission surface 12 faces the -Z axis direction and is parallel to the XY plane. The exit surface 12 facing the -Z axis direction may be a convex surface or a concave surface. The emitting surface 12 may be inclined with respect to the XY plane, and may include a curved surface. In this embodiment, the optical axis of the terminal optical element 13 is parallel to the Z axis. In this embodiment, the exposure light EL emitted from the emission surface 12 travels in the -Z axis direction.
The substrate stage 2 can be moved in the XY plane including a position (projection region PR) to which the exposure light EL from the emitting surface 12 can be irradiated while the substrate P is held. Measurement The measuring stage 3 can be moved in the XY plane including a position (projection region PR) to which the exposure light EL from the emission surface 12 can be irradiated while the measurement member (measuring device) C is mounted. Each of the substrate stage 2 and the measurement stage 3 can move on the guide surface 14G of the base member 14. In this embodiment, the guide surface 14G is substantially parallel to the XY plane.
In the present embodiment, the substrate stage 2 includes, for example, a first holder for holding a substrate P as disclosed in US Patent Application Publication No. 2007/0177125 and US Patent Application Publication No. 2008/0049209. The second holding portion is disposed around the first holding portion and holds the covering member T so as to be releasable. The first holding portion holds the substrate P such that the surface (upper surface) of the substrate P is substantially parallel to the XY plane. In this embodiment, the upper surface of the substrate P held by the first holding portion and the upper surface of the cover member T held by the second holding portion are arranged substantially in the same plane. Of course, the upper surface of the substrate P held by the first holding portion and the upper surface of the cover member T held by the second holding portion may not be arranged in the same plane, or the upper surface of the cover member T may be inclined with respect to the upper surface of the substrate P, or The upper surface of the covering member T includes a curved surface.
The substrate stage 2 and the measurement stage 3 are moved by the operation of a driving system 15 including a planar motor disclosed in, for example, U.S. Patent No. 6,452,292. The drive system 15 includes a mover 2C disposed on the substrate stage 2, a mover 3C disposed on the measurement stage 3, and a holder 14M disposed on the base member 14. The substrate stage 2 and the measurement stage 3 can be respectively moved in six directions of the X-axis, Y-axis, Z-axis, θX, θY, and θZ directions on the guide surface 14G by the operation of the driving system 15. The drive system 15 may not include a planar motor. For example, the drive system 15 may include a linear motor.
The measurement system 4 includes an interferometer system. The interferometer system includes a measurement mirror of the substrate stage 2 and a measurement mirror of the measurement stage 3 to irradiate measurement light to measure the substrate stage 2 And a unit for measuring the position of the stage 3. The measurement system may include, for example, an encoder system disclosed in US Patent Application Publication No. 2007/0288121. The measurement system 4 may include only one of an interferometer system and an encoder system.
When performing the exposure processing of the substrate P or the predetermined measurement processing, the control device 6 performs position control of the substrate stage 2 (substrate P) and the measurement stage 3 (measurement member C) based on the measurement results of the measurement system 4.
Next, the liquid immersion member 5 according to this embodiment will be described. FIG. 2 is a side cross-sectional view showing an example of a liquid immersion member 5 according to this embodiment. FIG. 3 is a view of the liquid immersion member 5 viewed from the lower side (−Z axis side). FIG. 4 is an enlarged view of a part of FIG. 2. In this embodiment, the liquid immersion member 5 is supported by the device frame 8B through the support device 50.
The liquid immersion member 5 forms a liquid immersion space LS in which the light path K of the exposure light EL emitted from the exit surface 12 of the terminal optical element 13 is filled with the liquid LQ. A part of the liquid immersion space LS is formed between the liquid immersion member 5 and an object capable of moving in an XY plane including a position facing the emission surface 12.
Objects that can move in the XY plane including the position facing the emitting surface 12 include objects that may be facing the emitting surface 12 and include objects that can be arranged in the projection area PR. The object includes an object that can be moved below the terminal optical element 13. In this embodiment, the object includes at least a part of the substrate stage 2 (for example, the cover member T of the substrate stage 2), the substrate P held by the substrate stage 2 (first holding portion), and the measurement stage 3. At least one of them. In the exposure of the substrate P, the liquid immersion space LS is formed so that the light path K of the exposure light EL irradiated on the substrate P is filled with the liquid LQ. When the substrate P is irradiated with the exposure light EL, a liquid immersion space LS in which only a part of the surface of the substrate P including the projection region PR is covered with the liquid LQ is formed.
In the following description, the object system facing the emission surface 12 is referred to as the substrate P. As described above, the object that can be opposed to the emitting surface 12 may be at least one of the substrate stage 2 and the measurement stage 3, or may be different from the substrate P, the substrate stage 2, and the measurement stage 3. Other objects. In addition, a liquid immersion space LS may be formed across the cover member T and the substrate P of the substrate stage 2, and a liquid immersion space LS may be formed across the substrate stage 2 and the measurement stage 3.
In the present embodiment, the liquid immersion member 5 includes a first member 21 disposed at least a part of the periphery of the terminal optical element 13 (the light path of the exposure light EL) and a second member 22 having a recovery port 24 for recovering the liquid LQ. At least a part of the second member 22 is disposed below the first member 21. At least a part of the first member 21 is disposed at a position farther from the substrate P (object) than the second member 22. The second member 22 is disposed between at least a part of the first member 21 and the substrate P (object). In addition, at least a part of the second member 22 is disposed outside the first member 21 with respect to the optical path (the optical axis of the terminal optical element 13) of the exposure light EL. In this embodiment, the optical path of the exposure light EL includes the concept of the optical path of the exposure light EL in the terminal optical element 13 (the optical path of the exposure light EL traveling on the terminal optical element 13). The optical path of the exposure light EL includes the concept of the optical path K of the exposure light EL emitted from the emission surface 12. In the present embodiment, the first member 21 is arranged at least in a portion around the terminal optical element 13 (the exposure light EL is on the optical path of the terminal optical element 13). In addition, the first member 21 may not be arranged around the terminal optical element 13, but may be arranged at least in a part around the optical path K of the exposure light EL emitted from the emitting surface 12. The first member 21 may be disposed on at least a part of the periphery of the terminal optical element 13 and at least a part of the periphery of the optical path K of the exposure light EL emitted from the emission surface 12.
Moreover, in this embodiment, the liquid immersion member 5 is provided with the supply port 23 which supplies the liquid LQ for forming the liquid immersion space LS. The supply port 23 is connected to the optical axis (light The radiation direction of the path K) is arranged inside the recovery port 24. In the present embodiment, the supply port 23 is arranged on the first member 21. The supply port 23 is disposed above the recovery port 24. The supply port 23 may be arranged on both the second member 22 and the first member 21 and the second member 22.
In the present embodiment, the first member 21 is disposed at least a part of the periphery of the terminal optical element 13 with a gap therebetween. In this embodiment, the first member 21 is ring-shaped. In this embodiment, a part of the first member 21 is arranged around the terminal optical element 13, and a loop is formed between the terminal optical element 13 and the first member 21. The shape of the gap may be circular or non-circular.
In this embodiment, a part of the first member 21 is arranged below the emission surface 12. That is, a part of the first member 21 is arranged around the optical path K between the emission surface 12 and the upper surface of the substrate P (object).
The first member 21 includes a first portion 211 facing at least a portion of the exit surface 12 of the terminal optical element 13, a second portion 212 at least partially arranged around the outer surface 16 of the terminal optical element 13, and a second portion 212 arranged Around Part 3 213. The outer surface 16 of the terminal optical element 13 does not emit the exposure light EL. In other words, the exposure light EL does not pass through the outside 16. In this embodiment, at least a part of the periphery of the optical axis (optical path K) of the terminal optical element 13, the outer surface 16 is inclined outward and upward toward the radiation direction of the optical axis (optical path K) of the terminal optical element 13.
The third portion 213 is disposed above the first portion 211. The third portion 213 is disposed on the outer side of the first portion 211 in the radiation direction with respect to the optical axis (optical path K) of the terminal optical element 13.
The first member 21 may not include the first portion 211. For example, the first component 21 may be arranged above the exit surface 12. The first member 21 may not include the second portion 212. For example, the first member 21 (the first portion 211 and the third portion 213) may be disposed below the emission surface 12.
In the present embodiment, the first member 21 is supported by the device frame 8B through the support device 50. In the present embodiment, the support device 50 is connected to the third portion 213. When the first member 21 does not have the third portion 213, the support device 50 may be connected to at least a part of the first member 21. The position of the device frame 8B is substantially fixed. The support device 50 supports the first member 21 above the substrate P (object). The support device 50 supports the first member 21 so as to form a gap between the terminal optical element 13 and the first member 21. The position of the projection optical system PL (terminal optical element 13) is substantially fixed. The position of the first member 21 is also substantially fixed. That is, in this embodiment, the terminal optical element 13 and the first member 21 do not substantially move. The relative position of the terminal optical element 13 and the first member 21 does not change.
The first member 21 has an opening 21H through which the exposure light EL emitted from the emission surface 12 can pass. The first portion 211 has an opening 21H. The first member 21 has at least a part of the upper surface 21A facing the emission surface 12 and the lower surface 21B opposite to the upper surface 21A. The first portion 211 includes an upper surface 21A and a lower surface 21B. The upper surface 21A and the emission surface 12 face each other with a gap therebetween. The substrate P (object) can face the lower surface 21B through the gap. The upper surface 21A is arranged around the upper end of the opening 21H. The lower surface 21B is arranged around the lower end of the opening 21H. In this embodiment, the upper surface 21A is substantially parallel to the XY plane. The lower surface 21B is substantially parallel to the XY plane. The lower surface 21B can hold the liquid LQ with the substrate P (object).
The first member 21 includes an inner surface 21C disposed around the upper surface 21A and facing the outer surface 16 of the terminal optical element 13, and an outer surface 21D opposite to the inner surface 21C. The outer surface 21D is arranged around the lower surface 21B. The second portion 212 has an inner surface 21C and an outer surface 21D. The outer surface 16 and the inner surface 21C face each other with a gap therebetween. The inner surface 21C and the outer surface 21D are inclined outward and upward with respect to the radiation direction with respect to the optical axis (optical path K) of the terminal optical element 13. At least one of the inner surface 21C and the outer surface 21D may be parallel to the optical axis of the terminal optical element 13 (parallel to the Z axis).
The first member 21 has an upper surface 21E disposed around the inner surface 21C and a lower surface 21G opposite to the upper surface 21E. The third part 213 has an upper surface 21E and a lower surface 21G. The lower 21G is arranged around the outer 21D. The outer surface 21D is configured to connect the outer edge of the lower surface 21B and the inner edge of the lower surface 21G. In this embodiment, the upper surface 21E and the lower surface 21G are substantially parallel to the XY plane, but they may not be parallel.
The second member 22 is movable relative to the first member 21. The second member 22 is movable relative to the terminal optical element 13. That is, in this embodiment, the relative positions of the second member 22 and the first member 21 are changed. The relative position of the second member 22 and the terminal optical element 13 is changed.
In this embodiment, the second member 22 can move substantially parallel to the XY plane. The second member 22 may be movable only in a single axis direction (for example, the X-axis direction or the Y-axis direction). In addition to moving in a direction substantially parallel to the XY plane, the second member 22 may be moved in at least one of the Z axis, θX, θY, and θZ.
The second member 22 is movable below at least a part of the first member 21. In this embodiment, the second member 22 can move below the third portion 213. In addition, the second member 22 can move outside at least a part of the first member 21 with respect to the optical path (the optical axis of the terminal optical element 13) of the exposure light EL. In this embodiment, the second member 22 can move outside the first portion 211 and the second portion 212 with respect to the optical path (the optical axis of the terminal optical element 13) of the exposure light EL. in When the second member 22 includes the first portion 211 and does not include the second portion 212, the second member 22 can move outside the first portion 211 with respect to the optical path of the exposure light EL (optical axis of the terminal optical element 13). When the second member 22 has the second portion 212 and does not have the first portion 211, the second member 22 can move outside the second portion 212 with respect to the optical path of the exposure light EL (optical axis of the terminal optical element 13). . In the present embodiment, the second member 22 is supported by the device frame 8B through the support device 50.
At least a part of the second member 22 is arranged in a direction parallel to the optical axis of the terminal optical element 13 so as to be movable between the first member 21 and the substrate P (object). The second member 22 is movable between the first member 21 and the substrate P (object). In this embodiment, the second member 22 can move in parallel with at least a part of the movement of the substrate P (object). In the present embodiment, the second member 22 can move in a state where the liquid immersion space LS is formed. The second member 22 can move in a state where liquid LQ is present in at least a part of the space between the second member 22 and the substrate P (object). The second member 22 can move in conjunction with the movement of the substrate P (object), and can move independently from the substrate P (object).
The second member 22 may be moved when the second member 22 and the substrate P (object) are not opposed to each other. In other words, the second member 22 can move when there is no object below the second member 22. The second member 22 may be moved when the liquid LQ does not exist in the space between the second member 22 and the substrate P (object). For example, the second member 22 can be moved when the liquid immersion space LS is not formed.
In the present embodiment, the second member 22 is disposed at least a part of the periphery of the terminal optical element 13. In the present embodiment, the second member 22 and the first member 21 are arranged with a gap therebetween. The second member 22 is disposed at least a part of the periphery of the first member 21 with a gap therebetween. The second member 22 is disposed in the first structure with respect to the optical path (the optical axis of the terminal optical element 13) of the exposure light EL through a gap. Piece 21 outside. The second member 22 is disposed below at least a part of the first member 21 with a gap therebetween.
In this embodiment, the second member 22 is ring-shaped. In the present embodiment, the second member 22 has an opening 26. The opening 26 of the second member allows the exposure light EL to pass through. In this embodiment, at least a part of the first member 21 may be arranged in the opening 26 of the second member 22. In the present embodiment, the second member 22 is disposed below the third portion 213 and is disposed around the second portion 212. The second member 22 is arranged with a gap formed between the second portion 212 and the third portion 213.
As shown in FIG. 3, in this embodiment, the second member 22 has a ring shape. In this embodiment, the opening 26 is substantially circular.
In the present embodiment, the second member 22 has an upper surface 22A facing the lower surface 21G of the first member 21 and a lower surface 22B opposite to the upper surface 22A. The upper surface 22A is arranged around the opening 26. The substrate P (object) may be opposed to the lower surface 22B. The lower surface 21G of the first member 21 and the upper surface 22A of the second member 22 face each other through a gap. The substrate P (object) can face the lower surface 22B through the gap. In this embodiment, the second member 22 and the first member 21 are movable below the first member 21 below the 21G through a gap.
In this embodiment, the movement of the second member 22 is guided by the lower surface 21G. When the lower surface 21G and the upper surface 21A face each other with a gap therebetween, the second member 22 moves along the lower surface 21G. In the following description, the lower surface 21G of the first member 21 is appropriately referred to as a guide surface 21G, and the upper surface 22A of the second member 22 is appropriately referred to as a moving surface 22A. The lower surface 21G of the first member 21 may not have a function as a guide surface. The second member 22 may not include the third portion 213.
In this embodiment, the second member 22 is disposed on the outer surface 21D of the first member 21 Around. The second member 22 moves in a space around the outer surface 21D. The second member 22 moves in a space around the outer surface 21D so as not to contact the first member 21. The second member 22 and the first member 21 are movable around the first member 21 (the second portion 212) via a gap.
In this embodiment, the guide surface 21G is located around the lower surface 21B and the outer surface 21D, and is disposed above the lower surface 21B. The lower surface 22B of the second member 22 is disposed above the lower surface 21B of the first member 21. The lower surface 22B of the second member 22 may be disposed below the lower surface 21B of the first member 21. In the case where the second portion 212 is not provided on the first member 21 as described above, a guide can be arranged in the same plane as the lower surface 21B of the first member 21 or below the lower surface 21B of the first member 21. Leading surface 21G.
As shown in FIG. 3, the exposure apparatus EX includes a drive system 40 that moves the second member 22. In this embodiment, the drive system 40 can move the second member 22 in the XY plane. In the example shown in FIG. 3, the driving system 40 includes a first actuator 41 that connects the second member 22C to the second member 22, moves the connecting member 40C in the Y-axis direction, and moves the first actuator 41. A second actuator 42 in the X-axis direction. At least one of the first actuator 41 and the second actuator 42 includes, for example, a motor driven by a Lorentz force. Of course, the drive system 40 is not limited to the form shown in FIG. The drive system 40 may move the second member 22 only in a single axis direction (for example, the X-axis direction or the Y-axis direction), or may move the second member 22 in a direction substantially parallel to the XY plane. The second member 22 moves in at least one of the Z axis, θX, θY, and θZ.
The drive system 40 moves the second member 22 such that at least a part of the guide surface 21G and at least a part of the moving surface 22A continuously face each other. In other words, the drive system 40 moves the second structure so that at least a part of the moving surface 22A does not protrude outside the guide surface 21G. Piece 22. The drive system 40 moves the second member 22 so that the first member 21 and the second member 22 do not contact each other.
In this embodiment, there is no liquid LQ between the guide surface 21G and the moving surface 22A. Infiltration of the liquid LQ between the guide surface 21G and the moving surface 22A is suppressed. The liquid immersion member 5 includes a suppression unit 30 that suppresses the liquid LQ from entering the gap between the guide surface 21G and the moving surface 22A. The suppressing portion 30 suppresses the liquid LQ from entering the space GS between the guide surface 21G and the moving surface 22A from the gap between the inner edge of the moving surface 22A of the second member 22 and the guide surface 21G of the first member 21 in the predetermined opening 26. The suppression unit 30 includes a liquid-repellent film 31 disposed on the guide surface 21G. The suppression unit 30 includes a liquid-repellent film 31 disposed on the moving surface 22A. The film 31 may be disposed on both the guide surface 21G and the moving surface 22A, or may be disposed on only one of them. With the membrane 31, the liquid LQ in the liquid immersion space LS is prevented from entering the gap between the guide surface 21G and the moving surface 22A.
The contact angle of the film 31 to the liquid LQ is, for example, 90 degrees or more. The contact angle of the film 31 may be 100 degrees or more, or 110 degrees or more. The film 31 may be formed of, for example, a fluorine-containing material, or a silicon-containing material. The membrane 31 may contain, for example, PFA (Tetra fluoro ethylene-perfluoro alkylvinyl ether copolymer), PTFE (Polytetrafluoroethylene, Poly tetra fluoro ethylene), PEEK (polyetheretherketone), or Teflon (registered trademark).
The suppression unit 30 includes a gas supply unit 32 that supplies gas between the guide surface 21G and the moving surface 22A. In the present embodiment, the gas supply unit 32 includes a gas supply port 33 that is arranged on the moving surface 22A and supplies gas to the gap between the guide surface 21G and the moving surface 22A. The air supply port 33 may be disposed on the guide surface 21G. The air supply port 33 may be disposed on both the guide surface 21G and the moving surface 22A. With the gas supplied from the gas supply port 33, the liquid LQ in the liquid immersion space LS is prevented from penetrating into the gap between the guide surface 21G and the moving surface 22A.
The suppression unit 30 may include the membrane 31 and not the air supply unit 32. Alternatively, the suppression unit 30 may include the air supply unit 32 instead of the membrane 31.
Further, as the suppressing portion 30, a convex portion may be provided near at least one of the inner edge of the moving surface 22A of the second member 22 defining the opening 26 and the guide surface 21G of the first member 21.
In this embodiment, a gas bearing is formed between the guide surface 21G and the moving surface 22A. With the gas bearing, in a state where a gap is formed between the guide surface 21G and the moving surface 22A, the second member 22 is movably supported by the first member 21.
In the present embodiment, the liquid immersion member 5 has an air supply port 33 and an exhaust port 34 arranged on the moving surface 22A and at least a part of a gas for discharging a gap between the guide surface 21G and the moving surface 22A. A gas bearing is formed between the guide surface 21G and the moving surface 22A by a gas supply from the air supply port 33 and a gas exhaust from the exhaust port 34. The air supply port 33 and the exhaust port 34 may be disposed on the guide surface 21G.
In this embodiment, the liquid immersion member 5 has a hole (opening) 35 that connects the space GS between the guide surface 21G and the moving surface 22A with the space around the liquid immersion member 5 (the space formed by the chamber device 9) CS. In this embodiment, the opening 35 is formed in the second member 22. The opening 35 is disposed between the inner edge of the moving surface 22A defining the opening 26 and the air supply port 33 (exhaust port 34). Through the opening 35, the space GS is opened in the space CS (ambient atmosphere) around the liquid immersion member 5. When the space CS formed by the chamber device 9 is the atmosphere (atmospheric pressure), the space GS is opened to the atmosphere through the opening 35. Of course, the space CS formed by the chamber device 9 may not be the atmosphere (atmospheric pressure). In addition, the opening 35 may not be provided.
The second member 22 has an inner surface 22C disposed around the outer surface 21D of the first member 21. The inner surface 22C connects the inner edge of the moving surface 22A and the inner edge of the lower surface 22B. In this embodiment, The inner surface 22C is inclined outwards and downwards with respect to the radiation direction of the optical axis (optical path K) of the terminal optical element 13. The inner surface 22C may be parallel to the optical axis of the terminal optical element 13 (parallel to the Z axis).
The supply port 23 is connected to the liquid supply device through a supply flow path formed inside the first member 21. The supply port 23 supplies a liquid LQ from a liquid supply device to form a liquid immersion space LS. In this embodiment, the supply port 23 is disposed on the inner surface 21C so as to face the gap between the emission surface 12 and the upper surface 21A. The supply port 23 may be disposed on the inner surface 21C so as to face the gap between the outer surface 16 and the inner surface 21C. The liquid LQ supplied from the supply port 23 is supplied onto the substrate P (object) through the opening 21H.
In this embodiment, the recovery port 24 of the second member 22 is arranged so that the substrate P (object) faces it. In the present embodiment, the second member 22 includes a porous member 25. In the present embodiment, the lower surface 22B of the second member 22 includes the lower surface of the porous member 25. The recovery port 24 includes pores of the porous member 25. The porous member 25 includes, for example, a sintered body or a pores member. The recovery port 24 (the hole of the porous member 25) is connected to a liquid recovery device (not shown). The liquid recovery device can connect the recovery port 24 to a vacuum system (not shown). The recovery port 24 can recover at least a part of the liquid LQ in the liquid immersion space LS. The liquid LQ recovered from the recovery port 24 is recovered to a liquid recovery device. In addition, a recovery port for recovering the liquid LQ may be provided on the inner surface 22C of the second member 22.
In this embodiment, the recovery operation of the liquid LQ from the recovery port 24 is performed in parallel with the supply operation of the liquid LQ from the supply port 23, so that the terminal optical element 13 and the liquid immersion member 5 on one side and the other side A liquid immersion space LS is formed between the substrates P (objects) by a liquid LQ.
In this embodiment, a part of the interface LG of the liquid LQ in the liquid immersion space LS is formed between the second member 22 and the substrate P (object). One of the lower surfaces 22B of the second member 22 The part and the inner surface 22C are in contact with the liquid LQ of the liquid immersion space LS.
In this embodiment, a part of the interface LG of the liquid LQ in the liquid immersion space LS is formed between the inner edge of the guide surface 21G of the first member 21 and the inner edge of the moving surface 22A of the second member 22. The guide surface 21G and the moving surface 22A are not in contact with the liquid LQ in the liquid immersion space LS.
In this embodiment, a part of the interface LG of the liquid LQ in the liquid immersion space LS is formed between the inner surface 21C of the first member 21 and the outer surface 16 of the terminal optical element 13.
In addition, a part of the interface LG of the liquid LQ in the liquid immersion space LS may be formed between the substrate P (object) and the first member 21 (for example, the guide surface 21G).
In the following description, the interface LG of the liquid LQ formed between the second member 22 and the substrate P (object) is appropriately referred to as a first interface LG1, and the interface LG formed between the first member 21 and the second member 22 The interface LG of the liquid LQ is appropriately referred to as a second interface LG2, and the interface LG of the liquid LQ formed between the first member 21 and the terminal optical element 13 is appropriately referred to as a third interface LG3.
5 and 6 are diagrams showing an operation example of the second member 22. The control device 6 moves the second member 22 in parallel with at least a part of the movement of the substrate P (object) according to, for example, the movement condition of the substrate P (object).
The second member 22 can recover the liquid LQ from the recovery port 24 while moving. The control device 6 moves the second member 22 in parallel with the recovery of the liquid LQ from the recovery port 24. The control device 6 moves the second member 22 while supplying the liquid LQ from the supply port 23 and recovering the liquid LQ from the recovery port 24 to continuously form the liquid immersion space LS.
As described above, the second member 22 can be in a state where the liquid immersion space LS is formed, Move substantially parallel to the XY plane. The second member 22 can move between the first member 21 (third portion 213) and the substrate P (object) in a state where the liquid immersion space LS is formed. The second member 22 can move in a space around the first member 21 (the second portion 212) in a state where the liquid immersion space LS is formed.
In this embodiment, the second member 22 moves so that the relative movement with the substrate P (object) becomes smaller. In addition, the second member 22 moves relative to the substrate P (object) so as to be smaller than the relative movement of the first member 21 and the substrate P (object). For example, the second member 22 can move in synchronization with the substrate P (object). For example, the second member 22 may move so as to follow the substrate P (object).
The relative movement includes at least one of a relative speed and a relative acceleration. For example, the second member 22 may be moved in a state where the liquid immersion space LS is formed so that the relative speed with the substrate P (object) becomes smaller. In addition, the second member 22 may be moved in a state where the liquid immersion space LS is formed so that the relative acceleration with the substrate P (object) becomes smaller. In addition, the second member 22 can be moved in a state where the liquid immersion space LS is formed at a relative speed to the substrate P (object) that is smaller than the relative speed of the first member 21 and the substrate P (object). In addition, the second member 22 can be moved in a state where the liquid immersion space LS is formed so that the relative acceleration with the substrate P (object) is smaller than the relative acceleration between the first member 21 and the substrate P (object).
For example, as shown in FIG. 5, when the substrate P (object) moves in the + Y axis direction, the control device 6 moves the second member 22 to + when the relative speed between the second member 22 and the substrate P (object) decreases. Y-axis direction. The control device 6 may also move the second member 22 in the + Y-axis direction while moving the second member 22 in the + Y-axis direction and the -X-axis in such a manner that the relative speed between the second member 22 and the substrate P (object) is reduced. At least one of the directions. That is, when the substrate P (object) moves in the + Y-axis direction, the second member 22 can move to the package in such a manner that the relative speed of the second member 22 and the substrate P (object) becomes smaller. Move in any direction in the XY plane containing the + Y-axis direction component.
As shown in FIG. 6, when the substrate P (object) moves in the -Y axis direction, the control device 6 moves the second member 22 so that the relative speed between the second member 22 and the substrate P (object) decreases. In the -Y axis direction. The control device 6 may also reduce the relative speed between the second member 22 and the substrate P (object), while moving the second member 22 in the -Y axis direction and the + X axis direction and the -X axis direction. At least one of them. That is, when the substrate P (object) moves in the -Y axis direction, the second member 22 can move in any direction in the XY plane including the component in the -Y axis direction so that the relative speed between the second member 22 and the substrate P (object) becomes smaller. .
In addition, when the substrate P (object) is moved in the + X axis direction, the second member 22 can be moved in an arbitrary direction in the XY plane including the + X axis direction component so that the relative speed of the second member 22 and the substrate P (object) is reduced. When the substrate P (object) moves in the -X axis direction, the second member 22 can move in any direction in the XY plane including the component in the -X axis direction so that the relative speed of the second member 22 and the substrate P (object) becomes smaller.
Next, a method for exposing the substrate P using the exposure apparatus EX having the above-mentioned configuration will be described.
At the substrate replacement position separated from the liquid immersion member 5, a process of carrying (loading) the substrate P before the exposure into the substrate stage 2 (first holding section) is performed. The measurement stage 3 is arranged to face the terminal optical element 13 and the liquid immersion member 5 in at least a part of the period during which the substrate stage 2 leaves the liquid immersion member 5. The control device 6 supplies the liquid LQ from the supply port 23 and the liquid LQ from the recovery port 24 to form a liquid immersion space LS on the measurement stage 3.
After the substrate P before exposure is loaded on the substrate stage 2 and the measurement process using the measurement stage 3 is finished, the control device 6 moves the substrate stage 2 so that the terminal optical element 13 and The liquid immersion member 5 faces the substrate stage 2 (substrate P). In a state where the terminal optical element 13 and the liquid immersion member 5 are opposed to the substrate stage 2 (substrate P), the liquid LQ from the recovery port 24 is recovered in parallel with the supply of the liquid LQ from the supply port 23 to terminate the A liquid immersion space LS in which the optical path K is filled with the liquid LQ is formed between the optical element 13 and the liquid immersion member 5 and the substrate stage 2 (substrate P).
The control device 6 starts exposure processing of the substrate P. The control device 6 emits the exposure light EL from the illumination system IL in a state where the liquid immersion space LS is formed on the substrate P. The illumination system IL illuminates the mask M with the exposure light EL. The exposure light EL from the mask M passes through the projection optical system PL and the liquid LQ in the liquid immersion space LS between the emission surface 12 and the substrate P to irradiate the substrate P. Accordingly, the substrate P is exposed by the exposure light EL emitted from the emitting surface 12 by the liquid LQ passing through the liquid immersion space LS, and the image of the pattern of the mask M is projected onto the substrate P.
The exposure device EX of this embodiment is a scanning exposure device (a so-called scanning stepper) that projects the image of the pattern of the mask M onto the substrate P while moving the mask M and the substrate P in a predetermined scanning direction. In this embodiment, the scanning direction (synchronous moving direction) of the substrate P is the Y-axis direction, and the scanning direction (synchronous moving direction) of the mask M is also the Y-axis direction. The control device 6 moves the substrate P relative to the projection area PR of the projection optical system PL in the Y-axis direction, and synchronizes with the movement of the substrate P toward the Y-axis direction, and moves the mask M to Y relative to the illumination area IR of the illumination system IL The substrate P is irradiated with the exposure light EL in the axial direction while passing through the liquid LQ of the projection optical system PL and the liquid immersion space LS on the substrate P.
FIG. 7 is a diagram showing an example of the substrate P held by the substrate stage 2. In this embodiment, a plurality of irradiation areas of the exposure target area are arranged in a matrix on the substrate P. The control device 6 sequentially exposes the plurality of irradiation areas of the substrate P held by the first holding portion with the exposure light EL through the liquid LQ in the liquid immersion space LS.
For example, in order to expose the first irradiation area S of the substrate P, the control device 6 moves the substrate P (the first irradiation area S) in the Y-axis direction relative to the projection area PR of the projection optical system PL, and moves the Y-axis direction with the substrate P The movement is synchronized, while the mask M is moved in the Y-axis direction relative to the illumination area IR of the illumination system IL, and the first irradiation area S is exposed through the liquid LQ of the projection optical system PL and the liquid immersion space LS on the substrate P for exposure. Light EL. Accordingly, the image of the pattern of the mask M is projected on the first irradiation area S of the substrate P, and the first irradiation area S is exposed by the exposure light EL emitted from the emission surface 12. After the exposure of the first irradiated area S is completed, the control device 6 starts the exposure of the second irradiated area S, and in a state where the liquid immersion space LS is formed, the substrate P intersects the X-axis direction in the XY plane ( For example, the X-axis direction, or a direction inclined in the XY plane with respect to the X-axis and Y-axis directions, etc.) is moved to move the second irradiation area S to the exposure start position. After that, the control device 6 starts the exposure of the second irradiation area S.
In the state where the liquid immersion space LS is formed on the substrate P (substrate stage 2), the control device 6 repeatedly moves the irradiation area to the position (projection area PR) irradiated with the exposure light EL from the emitting surface 12 The operation of exposing the irradiated area while exposing the irradiated area and moving the substrate P in the XY plane and Y in a state where a liquid immersion space LS is formed on the substrate P (substrate stage 2) after the exposure in the irradiated area. A direction in which the axial directions intersect (such as an X-axis direction, or a direction inclined in the XY plane with respect to the X-axis and Y-axis directions) to arrange the next irradiation area at the exposure start position, while making the plurality of irradiation areas of the substrate P Sequential exposure.
In the following description, a position where the liquid immersion space LS is formed on the substrate P (substrate stage 2) in order to expose the irradiation area is exposed to the exposure light EL from the emission surface 12 (projection area PR). The operation of moving the substrate P (irradiated area) in the Y-axis direction is appropriately referred to as a scanning movement operation. After the exposure of a certain irradiation area is completed, the substrate P (substrate stage 2) is exposed. In a state where the liquid immersion space LS is formed thereon, the operation of moving the substrate P in the XY plane during the exposure of the next irradiation region is appropriately referred to as a step movement operation. The control device 6 sequentially exposes the plurality of irradiation areas S of the substrate P while repeating the scanning movement operation and the step movement movement. The scanning movement operation is specialized in constant speed movement in the Y-axis direction. Step motion includes acceleration and deceleration. For example, the step movement between two adjacent irradiation areas in the X-axis direction includes an acceleration / deceleration movement in the Y-axis direction and an acceleration / deceleration movement in the X-axis direction.
In addition, in at least a part of the scan movement operation and the step movement movement, at least a part of the liquid immersion space LS may be formed on the substrate stage 2 (the cover member T).
The control device 6 controls the driving system 15 to move the substrate P (substrate stage 2) according to the exposure conditions of the plurality of irradiation areas S on the substrate P. The exposure conditions of the plurality of irradiated areas S are specified, for example, by exposure control information called an exposure recipe. The exposure control information is stored in the memory device 7. The control device 6 sequentially exposes the plurality of irradiated areas S while moving the substrate P under a predetermined moving condition based on the exposure conditions stored in the memory device 7. The moving conditions of the substrate P (object) include at least one of a moving speed, an acceleration, a moving distance, a moving direction, and a moving track in the XY plane.
The control device 6 moves the substrate stage 2 so that the projection area PR of the projection optical system PL and the substrate P are relatively moved along the movement trajectory indicated by the arrow Sr in FIG. 7, and irradiates the projection area PR with the exposure light EL, The plurality of irradiated areas S of the substrate P are sequentially exposed by the exposure light EL through the liquid LQ.
Thereafter, the above-mentioned processing is repeated to sequentially expose the plurality of substrates P.
In this embodiment, the second member 22 is moved in at least a part of the exposure process of the substrate P. The second member 22 has a substrate P (substrate-mounted) in a state where the liquid immersion space LS is formed. The stage 2) moves so that the relative movement (relative speed, relative acceleration) to the substrate P (substrate stage 2) becomes smaller when the scanning movement operation and step movement movement are performed.
FIG. 8 (A) is a diagram schematically showing an example of the movement trajectory of the substrate P when the irradiation area Sa and the irradiation area Sb are sequentially exposed, and FIG. 8 (B) is a diagram schematically showing the irradiation area Sa and the irradiation An example of the movement trajectory of the second member 22 when the regions Sb are sequentially exposed.
As shown in FIG. 8 (A), when the irradiation area Sa is exposed, the substrate P is under the terminal optical element 13 and sequentially moves from the position d1 to a position d2 adjacent to the position d1 on the −Y axis side. Tp1, the path Tp2 from position d2 to the adjacent position d3 on the -X axis side relative to the position d2, the path Tp3 from position d3 to the position d3 on the + Y axis side adjacent position d4, and the position d4 to the relative This position d4 is a path Tp4 adjacent to the position d5 on the -X axis side. The positions d1, d2, d3, and d4 are positions in the XY plane.
At least a part of the path Tp1 is a straight line parallel to the Y axis. At least a part of the path Tp3 is a straight line parallel to the Y axis. The path Tp2 contains a curve. The path Tp4 contains a curve. The position d1 includes the start point of the path Tp1, and the position d2 includes the end point of the path Tp1. The position d2 includes the start point of the path Tp2, and the position d3 includes the end point of the path Tp2. The position d3 contains the start point of the path Tp3, and the position d4 contains the end point of the path Tp3. The position d4 includes the start point of the path Tp4, and the position d5 includes the end point of the path Tp4. The path Tp1 is a path in which the substrate P moves in the -Y axis direction. The path Tp3 is a path in which the substrate P moves in the + Y axis direction. The path Tp2 and the path Tp4 are paths in which the substrate P moves in a direction having the -X axis direction as a main component.
When the substrate P moves to the path Tp1 in a state where the liquid immersion space LS is formed, the irradiation area Sa is irradiated with the exposure light EL through the liquid LQ. The operation of moving the substrate P on the path Tp1 includes a scanning movement operation. In addition, the substrate P moves in a state where the liquid immersion space LS is formed. When moving through the path Tp3, the irradiation area Sb is irradiated with the exposure light EL through the liquid LQ. The operation of moving the substrate P on the path Tp3 includes a scanning movement operation. In addition, the operation of moving the substrate P on the path Tp2 and the operation of moving the path Tp4 include a step movement operation.
When the substrate P sequentially moves on the paths Tp1, Tp2, Tp3, and Tp4, as shown in FIG. 8 (B), the second member 22 sequentially moves on the paths Tn1, Tn2, Tn3, and Tn4. The path Tn1 is a path from the position e1 to the position e2. The path Tn2 is a path from the position e2 to the position e3. The path Tn3 is a path from the position e3 to the position e4. The path Tn4 is a path from the position e4 to the position e1. The path Tn1 includes a straight line. The path Tn2 contains a curve. The path Tn3 includes a straight line. The path Tn4 contains a curve. The path Tn1 intersects the path Tn3. The paths Tn1 and Tn3 are inclined with respect to both the X-axis and the Y-axis. The path Tn1 is a path in which the second member 22 moves in the + X axis direction and moves in the -Y axis direction. The path Tn2 is a path in which the second member 22 moves in a direction having the −X axis direction as a main component. The path Tn3 is a path in which the second member 22 moves in the + X axis direction while moving in the + Y axis direction. The path Tn4 is a path in which the second member 22 moves in a direction having the −X axis direction as a main component.
That is, in this embodiment, the second member 22 moves in the XY plane so as to draw the Arabic numeral "8".
FIG. 9 and FIG. 10 show an example of a state in which the second member 22 is moved so as to draw an "8". 9 and 10 are diagrams in which the second member 22 is viewed from the substrate P (object) side. The second member 22 can pass from the state shown in FIG. 9 (A) in order through FIG. 9 (B), FIG. 9 (C), FIG. 9 (D), FIG. 10 (A), FIG. 10 (B), and FIG. The state shown in FIG. 10 (C) moves in a manner of changing to the state shown in FIG. 10 (D).
FIG. 11 and FIG. 12 show sequential exposures of a plurality of adjacent irradiation areas parallel to the X axis by the scanning movement operation and the step movement operation while sequentially moving in the + X axis direction. An example of the relationship between the moving speed of the substrate P (substrate stage 2) at this time and the moving speed of the second member 22 that moves in a "8" pattern in accordance with the movement of the substrate P.
FIG. 11 (A) shows the respective moving speeds of the substrate P (substrate stage 2) and the second member 22 in the X-axis direction. FIG. 11 (B) shows the respective moving speeds of the substrate P (substrate stage 2) and the second member 22 in the Y-axis direction. The line Vxp in FIG. 11 (A) shows the moving speed of the substrate P (substrate stage 2) in the X-axis direction, and the line Vxn shows the moving speed of the second member 22 in the X-axis direction. The line Vyp in FIG. 11 (B) shows the moving speed of the substrate P (substrate stage 2) in the Y-axis direction, and the line Vyn shows the moving speed of the second member 22 in the Y-axis direction.
In FIG. 11, the period Ta represents a period during which the substrate P (substrate stage 2) performs a scanning movement operation. The period Tb represents a period during which the substrate P (substrate stage 2) performs a step movement operation. As shown in FIG. 11, during at least a part of the period Ta of the scanning movement operation of the substrate P (substrate stage 2), the second member 22 faces the same scanning direction (Y-axis direction) as the substrate P (substrate stage 2). Move and move in the direction (-X axis direction) opposite to the step direction (+ X axis direction) of the substrate P (substrate stage 2). In at least a part of the period Tb of the step movement operation of the substrate P (substrate stage 2), the second member 22 moves in the same scanning direction (Y-axis direction) as the substrate P (substrate stage 2), and Move to the same direction (+ X axis direction) as the step direction (+ X axis direction) of the substrate P (substrate stage 2).
FIG. 12 (A) shows the relative speed of the substrate P (substrate stage 2) and the second member 22 in the X-axis direction. FIG. 12 (B) shows the relative speed of the substrate P (substrate stage 2) and the second member 22 in the Y-axis direction. The line ΔVx in FIG. 12 (A) shows the relative speed between the substrate P (substrate stage 2) and the second member 22 in the X-axis direction. The line ΔVy in FIG. 12 (B) shows the relative speed of the substrate P (substrate stage 2) and the second member 22 in the Y-axis direction. In addition, in FIG. 12 (A), X is displayed simultaneously. The moving speed Vxp of the substrate P (substrate stage 2) in the axial direction, and the moving speed Vyp of the substrate P (substrate stage 2) in the Y-axis direction are also shown in FIG. 12 (B).
As shown in FIG. 12, when the substrate P (substrate stage 2) performs a scanning movement operation and a step movement operation, the second member 22 moves in a manner of drawing an “8” to make the substrate P (substrate stage) 2) The relative speeds (ΔVx, ΔVy) with the second member 22 are at least smaller than the moving speeds (Vxp, Vyp) of the substrate P (substrate stage 2). In addition, the relative speeds (ΔVx, ΔVy) of the substrate P (substrate stage 2) and the second member 22 can be made at least higher than the relative speeds (Vxp, Vyp) of the substrate P (substrate stage 2) and the first member 21. small.
In the period Ta in FIG. 11, the speed (absolute value) when the second member 22 moves at a constant speed in the scanning direction is smaller than the speed (absolute value) when the substrate P (substrate stage 2) moves at a constant speed in the scanning direction. , But it can be the same. In addition, in the period Ta in FIG. 11, there may be no period in which the second member 22 moves in the scanning direction at a constant speed. In the period Tb in FIG. 11, the maximum speed (absolute value) when the second member 22 moves in the step direction is smaller than the maximum speed (absolute value) when the substrate P (substrate stage 2) moves in the step direction. , But it can be the same. In addition, during the period Tb in FIG. 11, the speed (absolute value) when the second member 22 moves in the scanning direction is smaller than the speed (absolute value) when the substrate P (substrate stage 2) moves in the scanning direction, but it may be identical. The maximum speed (absolute value) when the second member 22 moves in the step direction during the period Ta may be the same as or different from the maximum speed (absolute value) when the second member 22 moves in the step direction during the period Tb. . For example, the maximum speed (absolute value) when the second member 22 moves in the step direction during the period Ta can be made greater than the maximum speed (absolute value) when the second member 22 moves in the step direction during the period Tb.
As described above, in the present embodiment, since the second member 22 having a movable recovery port 24 is provided below the first member 21, even when liquid immersion is formed, In the state of the intermediate LS, objects such as the substrate P are moved in the XY plane. For example, the situation where the liquid LQ flows out of the space between the liquid immersion member 5 and the object or the liquid remains on the object is also suppressed. Further, generation of bubbles (gas portions) in the liquid LQ of the liquid immersion space LS is also suppressed.
Moreover, by moving the second member 22 such that the relative movement (relative speed, relative acceleration) with the object becomes smaller, even when the object moves at a high speed in a state where the liquid immersion space LS is formed, the liquid LQ flows out and the liquid LQ Residual or bubble generation in liquid LQ is also suppressed.
Therefore, it is possible to suppress the occurrence of poor exposure and the occurrence of defective elements.
In the present embodiment, the first member 21 is disposed at least a part of the periphery of the terminal optical element 13. Therefore, when the object moves or the second member 22 moves while the liquid immersion space LS is formed, the terminal optical element Changes in the pressure between 13 and the first member 21 or large changes in the shape of the third interface LG3 of the liquid LQ between the first member 21 and the terminal optical element 13 are suppressed. Therefore, for example, generation of air bubbles in the liquid LQ and excessive force acting on the terminal optical element 13 are suppressed. In addition, in this embodiment, since the first member 21 does not substantially move, the pressure between the terminal optical element 13 and the first member 21 changes greatly, or the liquid LQ between the terminal optical element 13 and the first member 21 varies. A situation where the shape of the third interface LG3 is greatly changed is suppressed.
The first member 21 may be movable. The first member 21 may be movable in the X-axis, Y-axis, Z-axis, θX, θY and At least one of the six directions of θZ. For example, to adjust the positional relationship between the terminal optical element 13 and the first member 21, or to adjust the positional relationship between the first member 21 and the second member 22, the first member 21 may be moved. The first member 21 can be moved in parallel with at least a part of the movement of the substrate P (object). For example, it is possible to move a distance shorter than the second member 22 in the XY plane. The first member 21 can move at a lower speed than the second member 22. Alternatively, the first member 21 may move at a lower acceleration than the second member 22.
Moreover, in this embodiment, since the liquid LQ does not exist between the guide surface 21G of the first member 21 and the moving surface 22A of the second member 22, the second member 22 can smoothly move.
A liquid LQ may be present between the guide surface 21G and the moving surface 22A. In addition, the suppression section 30 may be omitted.
In this embodiment, a gas bearing may not be formed between the first member 21 and the second member 22. In the present embodiment, the first member 21 may not include the third portion 213. In this case, the first member 21 may not be disposed above the second member 22. That is, the second member 22 may not be moved below the first member 21. In this embodiment, the first member 21 and the second member 22 are supported by the device frame 8B, but the first member 21 may be supported by another frame different from the device frame 8B. For example, the first member 21 may be supported by the reference frame 8A.
In addition, in this embodiment, the inner surface 22C of the second member 22 is inclined downward and outward with respect to the radiation direction of the optical path K. Therefore, the inner surface 22C moves in a state where the inner surface 22C is in contact with the liquid LQ in the liquid immersion space LS, A situation in which the pressure of the immersion space LS is greatly changed, or an undesired flow of the liquid LQ in the liquid immersion space LS is suppressed.
In the example shown in FIG. 8 and the like, the second member 22 is moved when the irradiation area Sa is exposed after exposure to the irradiation area Sa, and the irradiation area Sb disposed in the X-axis direction is exposed. However, for example, FIG. 13 may be used. As shown in (A), after sequentially irradiating the irradiation region Sc, the irradiation region Sd, and the irradiation region Se arranged in the Y-axis direction, the irradiation region Sf is arranged in the X-axis direction with respect to the irradiation regions Se, Sd, and Sc. When the irradiation area Sg and the irradiation area Sh are sequentially exposed, as shown in FIG. 13 (B), the second member 22 is moved. In the example shown in FIG. 13, the second member 22 may be used as an example. Move like drawing the number "8".
In the above embodiment, the second member 22 may not draw the Arabic numeral "8" when the substrate P performs a scanning movement operation and a stepping movement operation. For example, the second member 22 can be moved only in the Y-axis direction, and when the substrate P (substrate stage 2) performs a scanning movement operation, it can be moved in the same Y-axis direction as the substrate P.
Moreover, in the above-mentioned embodiment, although the second member 22 is continuously moved so that the guide surface 21G and the moving surface 22A face each other, the second member 22 may project at least a part of the moving surface 22A to the outside of the guide surface 21G. Way to move. In addition, the second member 22 may be moved so as to be in contact with at least a part of the first member 21.
In the above embodiment, the second member 22 may be moved in a manner that the moving distance in the X-axis direction is longer than the moving distance in the Y-axis direction while the liquid immersion space LS is formed, or the moving distance in the Y-axis direction is longer. Move in a way that the movement distance in the X axis direction is long. In addition, the second member 22 can move in the X-axis direction by a longer distance, a shorter distance, or an equivalent distance than the size of the opening 21H. In addition, the second member 22 can move a longer distance, a shorter distance, or an equivalent distance than the size of the irradiation area S. Furthermore, the second member 22 can move a distance that is longer than the size of the lower surface 21B, a short distance, or an equivalent distance.
Next, a second embodiment will be described. In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and descriptions thereof are simplified or omitted.
FIG. 14 is a diagram showing an example of the second member 222 of the present embodiment. As shown in FIG. 14, the outer surface 22D of the second member 222 may be inclined outward and upward in the radiation direction with respect to the optical path K. In this way, even if, for example, the first interface LG1 is moved outside the lower surface 22B, it can be borrowed. The inclined outer surface 22D suppresses the outflow of the liquid LQ. For example, in FIG. 14, when the substrate P (object) moves in the -Y axis direction, the first interface LG1 may move in the -Y axis direction. Since the inclined outer surface 22D is provided, the movement of the first interface LG1 in the -Y axis direction between the outer surface 22D and the upper surface of the substrate P (object) is suppressed.
Moreover, even if the second member 222 moves, the outflow of the liquid LQ can be suppressed by tilting the outer surface 22D.
In this embodiment, a gas bearing may not be provided, or the first member 21 may not include the third portion 213. The same applies to the following embodiments.
Next, a third embodiment will be described. In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and descriptions thereof are simplified or omitted.
FIG. 15 is a diagram showing an example of the second member 223 of the third embodiment. In the present embodiment, the second member 223 includes a mesh plate 253 and a base member 254 that supports the mesh plate 253. A space 223S is formed between the mesh plate 253 and the base member 254. The mesh plate 253 has a lower surface 253B facing the substrate P (object), an upper surface 253A facing the space 223S, and a plurality of holes (openings) formed to connect the upper surface 253A and the lower surface 253B. The recovery port 24 includes a hole (opening) of the mesh plate 253. At least a part of the liquid LQ in contact with the lower surface 253B can flow into the space 223S through the recovery port 24.
In the example shown in FIG. 15, the space 223S is connected to a liquid recovery device (not shown). The liquid recovery device includes a vacuum system (not shown). In this embodiment, the difference between the pressure on the upper side 253A and the lower side 253B is adjusted so that only the liquid LQ between the mesh plate 253 and the object is recovered through the recovery port 24, and no gas is recovered. In addition, substantially only the liquid is recovered through the porous member. An example of a technique for restricting gas recovery is disclosed in, for example, US Pat. No. 7,292,313.
In this embodiment, the second member 223 may recover the liquid LQ while moving. In this embodiment, the second member 223 can also be used to suppress the occurrence of poor exposure.
Next, a fourth embodiment will be described. In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and descriptions thereof are simplified or omitted.
FIG. 16 is a diagram showing an example of the second member 224 of this embodiment. The second member 224 has an opening 264 in which at least a part of the first member 21 is arranged. The size of the opening 264 in the X-axis direction is different from that of the opening 264 in the Y-axis direction. In the example shown in FIG. 16, the size of the opening 264 in the X-axis direction is smaller than the size of the opening 264 in the Y-axis direction. Of course, the size of the opening 264 in the X-axis direction may be larger than the size of the opening 264 in the Y-axis direction. In the example shown in FIG. 16, the shape of the opening 264 of the second member 224 is oval.
In the examples shown in Figs. 3 and 16, the openings (26, etc.) of the second member (22, etc.) do not have corner portions, but may have corner portions. For example, the opening (26, etc.) of the second member (22, etc.) may be a polygon such as a triangle, a quadrangle, a pentagon, a hexagon, a heptagon, an octagon, or the like.
In the examples shown in FIG. 3 and FIG. 16, the openings (26, etc.) of the second member (22, etc.) and the outer shape of the second member 22 are substantially the same shape (similar), but they may not be the same shape.
Next, a fifth embodiment will be described. In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and descriptions thereof are simplified or omitted.
FIG. 17 is a diagram showing an example of the second member 225 in this embodiment. As shown As shown in FIG. 17, the second member 225 in the XY plane is substantially quadrangular in shape. The opening 265 of the second member 225 is circular. Of course, the opening 265 may be a polygon, an ellipse, for example, a quadrangle, a hexagon, an octagon, or the like.
In this embodiment, the second member 225 does not have a porous member. In FIG. 17, a plurality of recovery ports 24 are arranged below the second member 225 around the optical path K. The recovery port 24 can recover the liquid LQ together with the gas. The first interface LG1 of the liquid LQ in the liquid immersion space LS is disposed at the recovery port 24.
In this embodiment, it is also possible to suppress the occurrence of the exposure failure by the movement of the second member 225.
In the above embodiment, the second member (22, etc.) is a ring-shaped member that surrounds the optical axis of the terminal optical element 13, but the second member may be arranged around the optical axis. The plurality of second members may be independently movable. In addition, among the plurality of second members, some of the second members may be moved, and some of the second members may not be moved.
In the above-mentioned embodiment, the control device 6 includes a computer system including a CPU and the like. The control device 6 includes an interface capable of performing communication between the computer system and an external device. The storage device 7 includes, for example, a memory such as a RAM, a recording medium such as a hard disk, and a CD-ROM. An operating system (OS) for controlling the computer system is installed in the memory device 5, and a program for controlling the exposure device EX is stored therein.
In addition, an input device capable of inputting an input signal may be connected to the control device 6. The input device includes an input device such as a keyboard or a mouse, or a communication device that can input data from an external device. In addition, a display device such as a liquid crystal display may be installed.
Various information including programs recorded in the memory device 7 can be controlled by the control device (Computer system) 6 to read. The memory device 7 stores therein a first liquid that causes the control device 6 to pass through the light path that is filled with the exposure light between the exit surface of the optical member that emits the exposure light and the substrate, and the liquid that immerses the substrate with the exposure light. Program for controlling the exposure device.
In addition, the program stored in the memory device 7 can be implemented by the control device 6 according to the above-mentioned embodiment: forming the liquid immersion space in which the light path of the exposure light emitted from the exit surface of the optical member is filled with the liquid; A movement of the liquid in the liquid immersion space to expose the substrate with the exposure light emitted from the exit surface; and a movement of a second member, the second member being related to at least a portion of the first member arranged around the optical member The recovery port is disposed below the first member through a gap and recovers at least a portion of the liquid in the liquid immersion space.
By reading the programs stored in the memory device 7 to the control device 6, the substrate stage 2, the measurement stage 3, and the exposure device EX such as the liquid immersion member 5 and various cooperative operations, a first liquid immersion is formed In the state of the space LS, various processes such as liquid immersion exposure of the substrate P are performed.
In each of the above embodiments, although the light path K system on the exit surface 12 side (image plane side) of the terminal optical element 13 of the projection optical system PL is filled with the liquid LQ, the projection optical system PL may be, for example, International Publication No. 2004 The projection optical system in which the light path of the incident side (object surface side) of the terminal optical element 13 disclosed in / 019128 is also filled with the liquid LQ.
In each of the above embodiments, the liquid LQ for exposure uses water, but may be a liquid other than water. The liquid LQ is preferably a film having a penetrating property to the exposure light EL, a high refractive index to the exposure light EL, and a photosensitive material (photoresist) forming a surface of the projection optical system PL or the substrate P. For example, the liquid LQ may be a hydrofluoroether (HFE), a perfluorinated polyether (PFPE), a fluorine lubricating oil (fomblin (registered trademark) oil), or the like. In addition, the liquid LQ may be various fluids, such as a supercritical fluid.
In addition, the substrate P in each of the above embodiments includes a semiconductor wafer for manufacturing a semiconductor element, a glass substrate for a display element, a ceramic wafer for a thin film magnetic head, or a mask or a reticle used in an exposure device. The original version of the film (synthetic quartz, silicon wafer), etc.
In each of the above embodiments, although the exposure device EX is a scanning type exposure device (scanning step) of a step & scan method that synchronously moves the mask M substrate P to scan and expose the pattern of the mask M Step), for example, a step & repeat method in which the pattern of the mask M is exposed once and the substrate P is sequentially moved in a state where the mask M and the substrate P are stationary. Projection exposure device (stepper).
Furthermore, in the exposure method of the exposure system EX series step-and-repeat method, the reduced image of the first pattern can be transferred to the substrate P by using the projection optical system PL while the first pattern is substantially stationary with the substrate P. In a state where the second pattern and the substrate P are substantially stationary, the reduced image of the second pattern is partially overlapped with the first pattern using the projection optical system PL and exposed on the substrate P at a time (a single exposure device of a bonding method). In addition, the exposure device of the bonding method may also be an exposure device of the step & stitch method in which at least two patterns are partially transferred on the substrate P and the substrate P is sequentially moved.
In addition, the exposure device EX may be, for example, disclosed in U.S. Patent No. 6611316, which combines the patterns of two photomasks on the substrate P through the projection optical system, and makes one irradiation area on the substrate P substantially double at the same time with one scanning exposure. Exposure device for exposure. In addition, the present invention can also be applied to a proximity exposure device, a mirror projection aligner, and the like.
In each of the above embodiments, the exposure device EX may be, for example, U.S. Patent No. 6,341,007, U.S. Patent No. 6,208,407 or U.S. Patent No. 6,262,796. A double-stage type exposure apparatus including a plurality of substrate stages disclosed in the manual and the like. For example, as shown in FIG. 18, when the exposure apparatus EX includes two substrate stages 2001 and 2002, the object facing the emission surface 12 may be disposed, including one substrate stage and the first substrate stage. At least one of a substrate held by the holding portion, a substrate stage of the other side, and a substrate held by the first holding portion of the other substrate stage.
In addition, the exposure device EX may be an exposure device having a plurality of substrate stages and measurement stages.
The exposure device EX may be an exposure device for manufacturing a semiconductor element that exposes a semiconductor element pattern to a substrate P, or an exposure device for manufacturing a liquid crystal display element or a display, or a thin film magnetic head or a photographic element (CCD). , Micro-machine, MEMS, DN chip, reticle or photomask.
In the above-mentioned embodiment, although a light-transmitting photomask having a predetermined light-shielding pattern (or a phase pattern or a light-reduction pattern) formed on a light-transmitting substrate is used, it is also possible to replace the photomask with, for example, US Patent No. According to the publication No. 6778257, a variable-shaped photomask (electronic photomask, active photomask, or image generator) that forms a transmission pattern or a reflection pattern, or forms a light-emitting pattern according to the electronic data of the pattern to be exposed. In addition, instead of a variable-shaped photomask having a non-emission type image display element, a pattern forming device including a self-emission type image display element may be provided.
Although the exposure apparatus EX includes the projection optical system PL in each of the above embodiments, the constituent elements described in the above embodiments may be applied to an exposure apparatus and an exposure method that do not use the projection optical system PL. For example, the constituent elements described in the above embodiments can be applied to an exposure device and an exposure method for forming a liquid immersion space between an optical member such as a lens and a substrate, and irradiating the substrate with exposure light through the optical member.
Also, the exposure device EX may be, for example, an exposure device disclosed in International Publication No. 2001/035168 pamphlet by forming interference fringes on the substrate P, thereby exposing line and space patterns on the substrate ( Lithography system).
The exposure apparatus EX of the above embodiment is manufactured by assembling various sub-systems (including each constituent element) so as to maintain predetermined mechanical accuracy, electrical accuracy, and optical accuracy. To ensure these various precisions, before and after assembly, various optical systems are adjusted to achieve optical accuracy, various mechanical systems are adjusted to achieve mechanical accuracy, and various electrical systems are used to achieve electrical accuracy. Adjustment. The assembly process from various sub-systems to the exposure device EX includes mechanical connections, wiring connections for circuits, and piping connections for pneumatic circuits. Of course, before the assembly steps from the various sub-systems to the exposure device EX, there are individual assembly steps for each sub-system. After the steps of assembling various sub-systems to the exposure device EX are completed, comprehensive adjustment is performed to ensure various accuracy of the entire exposure device EX. In addition, it is preferable to manufacture the exposure device EX in a clean room where temperature and cleanliness are managed.
As shown in FIG. 19, micro-elements such as semiconductor elements are subjected to step 201 of functional and performance design of the micro-elements, and step 202 of making a photomask M (reticle) according to this design step to manufacture a substrate of the element base material Step 203 includes a substrate processing step 204 including performing substrate processing (exposure processing, including the operation of exposing the substrate with the exposure light EL using the pattern of the photomask M, and the operation of developing the substrate after the exposure) according to the above embodiment. It is manufactured by assembling steps (processing processes including cutting steps, bonding steps, packaging steps, etc.) 205, and inspection steps 206 and the like.
In addition, the requirements of each of the above embodiments can be appropriately combined. There are also cases where some constituent elements are not used. In addition, within the scope permitted by laws and regulations, the above-mentioned embodiments are invoked. The disclosures of all publications and exposures to the exposure apparatus and the like cited in the modified examples and U.S. patents are part of the description herein.
A liquid immersion member is a liquid immersion space formed on an object capable of moving under the optical member in such a manner that a light path of exposure light emitted from an exit surface of the optical member is filled with a liquid. The liquid immersion member includes: The member is at least a part disposed around the optical member, the first member has a first surface, and the second member is movable relative to the first member and has a recovery of at least a part of the liquid recovered in the liquid immersion space. The second member has a second face facing the first face of the first member with a gap between the first face and the second face; and an air supply port facing the first member In the gap between the second member and the second member, gas is supplied from the air supply port to the gap, and the air supply port is disposed in at least one of the first surface and the second surface.
For example, the liquid immersion member of item 1 of the patent application scope, wherein the second member can move substantially parallel to a predetermined surface perpendicular to the optical axis of the optical member.
For example, the liquid immersion member of item 1 or 2 of the patent application scope, wherein the second member can move between the first member and the object.
For example, the liquid immersion member of item 1 or 2 of the patent application scope, wherein the second member is in a state where at least a part of the space between the second member and the object exists in the liquid, and the movement of the object At least a portion moves in parallel.
For example, the liquid immersion member of item 1 or 2 of the patent application scope, wherein the second member can move while recovering the liquid from the recovery port.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope, wherein the recovery port is configured to face the object.
For example, the liquid immersion member of item 1 or 2 of the patent application scope, wherein the first member is immovable relative to the optical member.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope, wherein the second member is supported to be movable.
For example, the liquid immersion member according to item 8 of the scope of patent application, wherein the first surface of the first member is substantially parallel to a predetermined surface perpendicular to the optical axis of the optical member; and the second surface of the second member Move along this first surface.
For example, the liquid immersion member according to item 9 of the scope of patent application, wherein there is no liquid between the first surface and the second surface.
For example, the liquid immersion member according to item 9 of the application, wherein at least a part of the interface of the liquid in the liquid immersion space is formed between the inner edge of the first surface and the inner edge of the second surface.
For example, the liquid immersion member according to item 9 of the patent application scope, wherein the liquid-repellent film is arranged on at least one of the first surface and the second surface.
For example, the liquid immersion member according to item 9 of the patent application scope, wherein a gas bearing is formed between the first surface and the second surface.
For example, the liquid immersion member according to item 13 of the patent application scope further has an exhaust port that discharges at least a part of the gas in the gap, and is arranged on at least one of the first surface and the second surface; The gas supply from the gas supply port and the gas exhaust from the exhaust port form the gas bearing.
For example, the liquid immersion member according to item 9 of the patent application, wherein the first member has a lower surface, and the lower surface is disposed around an opening through which the exposure light emitted from the exit surface can pass and can be located between the first member and the object. The liquid is held between them; and the first surface is arranged around the lower surface and is arranged above the lower surface.
For example, the liquid immersion member of the scope of application for patent No. 15, wherein the second member has a lower surface that can face the object; and the lower surface of the second member is disposed above the lower surface of the first member.
For example, the liquid immersion member according to item 15 of the application, wherein the first member has an outer surface connecting the outer edge of the lower surface with the inner edge of the first surface; and the second member moves in a space around the outer surface.
For example, the liquid immersion member according to item 17 of the patent application scope, wherein the inner surface of the second member disposed around the outer surface is inclined outward and downward with respect to the radiation direction of the optical path.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope, wherein the first member is disposed at least a part of the periphery of the optical member with a second gap therebetween.
For example, the liquid immersion member of item 1 or 2 of the patent application scope, wherein the second member includes a porous member; and the recovery port includes a hole of the porous member.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope further has a supply port for supplying a liquid for forming the liquid immersion space.
For example, the liquid immersion member according to the scope of application for patent No. 21, wherein the supply port is arranged inside the recovery port in a radiation direction with respect to the optical path.
For example, the liquid immersion member according to the scope of patent application No. 21, wherein the supply port is arranged on the first member.
For example, the liquid immersion member of item 1 or 2 of the patent application scope, wherein the liquid is restricted to the gap between the first surface and the second surface.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope, wherein at least a part of the interface of the liquid in the liquid immersion space is formed between the first surface and the second surface.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope, wherein at least one of the first surface and the second surface has a liquid-repellent surface.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope, wherein a gas bearing is formed between the first surface and the second surface by supplying gas from the air supply port.
For example, the liquid immersion member according to item 1 or 2 of the patent application scope further includes an exhaust port for exhausting at least a part of the gas in the gap, and the exhaust port is arranged on at least one of the first surface and the second surface.
For example, the liquid immersion member according to claim 29, wherein the first member has a liquid supply port, and the liquid is supplied to the second gap through the liquid supply port.
The invention relates to an exposure device which exposes a substrate through exposure liquid with exposure light. The exposure device is provided with a liquid immersion member according to any one of claims 1 to 30.
For example, the exposure device according to item 31 of the patent application, wherein the second member moves in such a manner that the relative speed with the object becomes smaller.
For example, the exposure device according to item 31 of the patent application, wherein the second member moves in a manner that the relative speed with the object is smaller than the relative speed between the first member and the object.
For example, the exposure device according to any one of claims 31 to 33, wherein the second member moves synchronously with the object.
For example, the exposure device according to any one of claims 31 to 33, wherein the second member sequentially moves in a first path from the first position to the second position in the predetermined plane, including the second path from the second position. The second path of the curve from the position to the third position, the third path from the third position to the fourth position crossing the first path, and the fourth path including the curve from the fourth position to the first position path.
For example, in the exposure device of the scope of patent application No. 35, in the state in which the liquid immersion space is formed, the object sequentially moves at least a part of a fifth path parallel to the first axis in the predetermined plane from the first path. The sixth position at the end of the first path is in a direction parallel to the second axis orthogonal to the first axis to the sixth position adjacent to one side of the fifth position. The seventh path from the sixth position to the seventh position whose axes are parallel, and the eighth position from the seventh position in a direction parallel to the second axis to the eighth position adjacent to one side of the seventh position Paths; the first and third paths are inclined with respect to both the first axis and the second axis; and when the object moves on the fifth, sixth, seventh, and eighth paths, the second member moves at The first, second, third, and fourth paths.
For example, the exposure device of the 36th aspect of the patent application further includes a substrate stage capable of holding the substrate moving; the object includes at least one of the substrate and the substrate stage.
For example, the exposure device according to any one of claims 31 to 33, further includes a drive system for moving the second member.
A device manufacturing method includes: an operation of exposing a substrate using an exposure device according to any one of claims 31 to 38; and an operation of developing the substrate after exposure.
An exposure method is to expose a substrate with exposure light through a liquid, including: forming an liquid immersion space in which a light path of the exposure light emitted from an exit surface of an optical member is filled with the liquid; and a liquid passing through the liquid immersion space An operation of exposing the substrate with the exposure light emitted from the emitting surface; an operation of moving a second member relative to the first member; the first member is arranged at least a part of the periphery of the optical member; and the second member has A recovery port for recovering at least a part of the liquid in the liquid immersion space, the first member has a first surface, the second member has a second surface, and the second surface is interposed between the first surface and the second surface. The air gap faces the first surface of the first member; and the action of supplying gas from the air supply port to the gap between the first surface and the second surface, the air supply port facing the gap, the air supply The air port is arranged on at least one of the first surface and the second surface.
For example, in the exposure method of claim 40, in at least a part of a scanning movement operation for exposing an irradiation area on the substrate, the second member moves in the same scanning direction as the substrate, and The substrate moves in opposite directions.
For example, the exposure method of the patent application No. 40 or 41, wherein, in at least a part of the step movement operation period after the exposure of one irradiation area on the substrate is ended and the exposure of the next irradiation area is started, the first The two members move in the same scanning direction as the substrate, and move in the same stepping direction as the substrate.
For example, the exposure method according to item 40 or 41 of the patent application scope, wherein the second member can move substantially parallel to a predetermined plane perpendicular to the optical axis of the optical member.
For example, the exposure method according to item 40 or 41 of the patent application scope, wherein the second member can be moved between the first member and the substrate.
For example, the exposure method of the patent application No. 40 or 41, wherein the second member can be parallel to at least a part of the movement of the substrate in a state where at least a part of the space between the second member and the substrate is present in the liquid. mobile.
For example, the exposure method according to item 40 or 41 of the patent application scope, wherein the second member can move while recovering the liquid from the recovery port.
For example, the exposure method according to item 40 or 41 of the patent application scope, wherein the recovery port is configured to face the substrate.
For example, the exposure method according to item 40 or 41 of the patent application range, wherein the second member is moved in such a manner that the relative speed with the substrate becomes smaller.
For example, the exposure method according to item 40 or 41 of the patent application scope, wherein the second member moves in a manner that the relative speed with the substrate is smaller than the relative speed between the first member and the substrate.
For example, the exposure method according to item 40 or 41 of the patent application scope, wherein the second member moves synchronously with the substrate.
A device manufacturing method includes an operation of exposing a substrate using an exposure method according to any one of claims 40 to 50, and an operation of developing the substrate after exposure.
TW106132812A 2012-04-10 2013-03-19 Liquid immersion member, exposure apparatus, exposure method, device fabricating method, program, and recording medium TWI658335B (en)
US61/622,235 2012-04-10
US13/793,667 2013-03-11
TW201804261A TW201804261A (en) 2018-02-01
TWI658335B true TWI658335B (en) 2019-05-01
TW108109504A TW201928530A (en) 2012-04-10 2013-03-19 Liquid immersion member, exposure apparatus, exposure method, device fabricating method, program, and recording medium
JP (3) JP6245179B2 (en)
CN (2) CN104350425B (en)
TW (3) TW201928530A (en)
TW200727087A (en) * 2005-11-16 2007-07-16 Asml Netherlands Bv Lithographic apparatus
TW200947145A (en) * 2008-03-27 2009-11-16 Nikon Corp Immersion system, exposure apparatus, exposing method, and device fabricating method
CN1965389B (en) 2004-06-09 2011-08-10 尼康股份有限公司 Substrate holding device, exposure device having the same, exposure method, method for producing element
CN102566317B (en) 2006-01-19 2014-08-06 株式会社尼康 Exposure method, exposure device, and device manufacturing method
2013-03-15 CN CN201711011972.0A patent/CN107728434B/en active IP Right Grant
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2018-10-24 US US16/169,210 patent/US10520828B2/en active Active
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US9323160B2 (en) 2016-04-26
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US10520828B2 (en) 2019-12-31
TW201928530A (en) 2019-07-16
CN107728434B (en) 2020-04-03
US10444634B2 (en) 2019-10-15 Exposure apparatus, exposing method, method for manufacturing device, program, and recording medium
JP2019219686A (en) 2019-12-26 Exposure apparatus, exposure method, method for manufacturing device, program, and recording medium
CN104350425B (en) 2017-11-28 Liquid immersion member and exposure device
TWI671599B (en) 2019-09-11 Liquid immersion member, exposure apparatus, exposing method, method for manufacturing device
US9927724B2 (en) 2018-03-27 Liquid immersion member, exposure apparatus, exposing method, method for manufacturing device, program, and recording medium
JP5239337B2 (en) 2013-07-17 Exposure method, exposure apparatus, and device manufacturing method
JPWO2007132862A1 (en) 2009-09-24 Projection optical system, exposure method, exposure apparatus, and device manufacturing method
US9223225B2 (en) 2015-12-29 Liquid immersion member, exposure apparatus, exposure method, and device manufacturing method
US20120162619A1 (en) 2012-06-28 Liquid immersion member, immersion exposure apparatus, exposing method, device fabricating method, program, and storage medium
JP2009239286A (en) 2009-10-15 Liquid immersion system, exposure apparatus, exposure method and device manufacturing method