WO2016072149A1 - ペリクル用支持枠および製造方法 - Google Patents
ペリクル用支持枠および製造方法 Download PDFInfo
- Publication number
- WO2016072149A1 WO2016072149A1 PCT/JP2015/075550 JP2015075550W WO2016072149A1 WO 2016072149 A1 WO2016072149 A1 WO 2016072149A1 JP 2015075550 W JP2015075550 W JP 2015075550W WO 2016072149 A1 WO2016072149 A1 WO 2016072149A1
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- WIPO (PCT)
- Prior art keywords
- frame
- support frame
- pellicle
- transparent substrate
- bonded
- Prior art date
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/62—Pellicles, e.g. pellicle assemblies, e.g. having membrane on support frame; Preparation thereof
- G03F1/64—Pellicles, e.g. pellicle assemblies, e.g. having membrane on support frame; Preparation thereof characterised by the frames, e.g. structure or material, including bonding means therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/62—Pellicles, e.g. pellicle assemblies, e.g. having membrane on support frame; Preparation thereof
Definitions
- the present invention relates to a pellicle support frame and a manufacturing method.
- the integrated circuit manufacturing process includes a photolithography process in which a circuit pattern drawn on a transparent substrate called a photomask or reticle is transferred to a resist coated on a wafer.
- the pellicle includes a support frame that encloses the entire circuit pattern drawn on the transparent substrate, and a translucent pellicle film that covers the surface of the support frame.
- the back surface of the support frame is bonded to the transparent substrate.
- JP 2009-025562 A Japanese Patent Laid-Open No. 9-068793
- the above-described support frame may be distorted in the front and back direction in a single state, it is pressed against the transparent substrate when bonding to a flat transparent substrate, so the support frame is bonded to the transparent substrate in a flat state.
- the transparent substrate since a restoring force is generated in the support frame to return to the original distorted shape, when the restoring force is large, the transparent substrate is also distorted following the deformation of the support frame.
- the transparent substrate is distorted, there is a problem that the circuit pattern is shifted from the normal position when the circuit pattern on the transparent substrate is transferred to the resist on the wafer.
- the present invention provides a pellicle support frame and a method for manufacturing a pellicle support frame that can solve the problems described above and prevent distortion of the support frame and the transparent substrate after the support frame is bonded to the transparent substrate. This is the issue.
- the pellicle support frame of the present invention includes an aluminum alloy frame, a pellicle film is bonded to the surface of the frame, and a transparent substrate is bonded to the back surface of the frame.
- a plurality of hollow portions are arranged in parallel in the circumferential direction of the frame body, and between the two adjacent hollow portions, the penetration from the outer peripheral surface of the frame body to the inner peripheral surface A hole is formed.
- the support frame becomes less rigid. Accordingly, since the restoring force of the support frame returning to the original distorted shape after the support frame is bonded to the flat transparent substrate is reduced, the support frame can be maintained in a flat shape following the transparent substrate.
- the hollow portion of the support frame does not communicate with the external space, it is possible to prevent foreign matters such as dust and processing liquid during processing from entering the hollow portion.
- the through hole is formed in the frame body, it is possible to prevent a pressure difference from being generated between the internal space and the external space of the support frame in a vacuum after being bonded to the pellicle film and the transparent substrate. .
- the frame body may be formed by joining two frame members.
- a plurality of concave grooves are provided in parallel in the circumferential direction on at least one of the joint surfaces of the two frame members, and the hollow portion is formed by the concave grooves. If it does in this way, the support frame of a hollow structure can be manufactured easily.
- the present invention is a method for manufacturing a support frame for a pellicle comprising two frame members made of an aluminum alloy.
- the present invention includes a step of forming a concave groove on at least one of the joint surfaces of the two frame members, and a step of joining the joint surfaces of the two frame members to form a hollow portion by the concave groove.
- the two frame members can be bonded with high accuracy and the strength of the support frame can be prevented from being lowered.
- bonding methods such as diffusion bonding, vapor deposition using a focused ion beam, and friction stir welding can be used.
- the rigidity of the support frame is reduced. Accordingly, since the restoring force of the support frame returning to the original distorted shape after the support frame is bonded to the flat transparent substrate is reduced, the support frame can be maintained in a flat shape following the transparent substrate.
- the support frame formed by the manufacturing method of the present invention does not communicate with the external space, foreign matter such as dust and processing liquid during processing can be prevented from entering the hollow part.
- the support frame of a hollow structure can be manufactured easily.
- the rigidity of the support frame can be reduced. Therefore, after the support frame is bonded to a flat transparent substrate, the support frame tries to return to the original distorted shape. The restoring force is reduced. That is, according to the present invention, since the support frame and the transparent substrate can be kept flat, the circuit pattern of the transparent substrate can be accurately transferred to the resist on the wafer.
- FIG. 1 It is the perspective view which showed the pellicle and transparent substrate of embodiment of this invention. It is the sectional side view which showed the pellicle and transparent substrate of embodiment of this invention. It is the typical top view which showed the support frame of embodiment of this invention.
- A) is a schematic side view showing a support frame of an embodiment of the present invention,
- (b) is an AA sectional view, and
- (c) is a BB sectional view.
- each part of the support frame is schematically shown as appropriate in order to easily explain the configuration of the support frame.
- front and rear, right and left and front and back are set for easy understanding of the support frame, and do not specify the structure of the support frame.
- the support frame 1A of this embodiment is used for the pellicle P as shown in FIG.
- the pellicle P is a dustproof cover for preventing dust and the like from adhering to the surface Ma of the transparent substrate M (photomask).
- the pellicle P includes a support frame 1A that surrounds the entire circuit pattern (not shown) drawn on the transparent substrate M, and a pellicle film 2 that covers the surface of the support frame 1A.
- the support frame 1A has a rectangular frame 10 in plan view.
- the frame 10 includes a pair of front and rear horizontal frame portions 11 and 11 and a pair of left and right vertical frame portions 12 and 12. Both horizontal frame portions 11 and 11 are portions that are long sides of the frame body 10, and both vertical frame portions 12 and 12 are portions that are short sides of the frame body 10. As shown in FIG. 2, the axial cross sections of the horizontal frame portion 11 and the vertical frame portion 12 are formed in a rectangle having a height dimension larger than the width dimension.
- the pellicle film 2 is a thin film having translucency, for example, a cellulose polymer such as nitrocellulose, cellulose acetate, and cellulose propionate that is excellent in ultraviolet transmittance, and amorphous It is formed using a fluorine polymer or the like.
- the pellicle film 2 is formed in a rectangular shape in plan view, and has the same shape as the outer shape of the support frame 1A.
- the pellicle film 2 is overlaid on the surface 10 a of the frame body 10, the entire surface 10 a of the frame body 10 is covered with the pellicle film 2.
- the frame 10 is a member obtained by joining the front-side frame member 30 and the back-side frame member 40. Both frame members 30 and 40 are obtained by processing an extruded material made of aluminum alloy. Both the frame members 30 and 40 are members having the same shape, and the both frame members 30 and 40 are arranged in opposite directions. And the back surface 30a of the frame member 30 of the front side and the surface 40a of the frame member 40 of the back side are joined.
- the frame body 10 is formed with a through hole 20, a plurality of hollow portions 51 to 53, and a plurality of jig holes 60.
- the through hole 20 is a cylindrical hole that penetrates from the outer peripheral surface 10 c of the frame body 10 to the inner peripheral surface 10 d.
- the through hole 20 is arranged at the center of the frame body 10 in the height direction.
- the through hole 20 is formed in the center in the left-right direction of the front horizontal frame portion 11, but the arrangement of the through holes 20 is not limited, for example, Alternatively, it may be formed on the rear horizontal frame portion 11 or the left and right vertical frame portions 12 and 12.
- the number of through holes 20 is not limited, and for example, one through hole 20 may be formed in each of the horizontal frame portion 11 and the vertical frame portion 12, or the front and rear horizontal frame portions 11, 11 or both the left and right vertical frame portions 12 and 12 may be formed with through holes 20.
- the jig hole 60 is a bottomed cylindrical hole formed in the outer peripheral surface 10 c of the frame body 10.
- the jig hole 60 is a part for holding the support frame 1A by the jig when the support frame 1A is manufactured or when the pellicle (see FIG. 1) is used.
- a jig pin is inserted into the jig hole 60.
- the jig hole 60 is arranged at the center in the height direction of the frame body 10, but the height of the jig hole 60 is limited. Instead, the height of the jig hole 60 is set according to the jig to be used. As shown in FIG.
- the jig hole 60 is formed near the left and right end portions of the front side horizontal frame portion 11, and is formed near the left and right end portions of the rear side horizontal frame portion 11. That is, left and right jig holes 60 are formed in the front and rear horizontal frame portions 11, 11 of the frame body 10.
- Each of the hollow portions 51 to 53 is a sealed space having a rectangular axial cross section (see FIG. 4B).
- the front horizontal frame 11 is formed with two left and right first hollow portions 51 and 51 and two left and right second hollow portions 52 and 52. Both the first hollow portion 51 and the second hollow portion 52 extend linearly in the longitudinal direction of the horizontal frame portion 11 (the left-right direction in FIG. 3).
- the left and right first hollow portions 51 and 51 are arranged with the center in the longitudinal direction of the front lateral frame portion 11 interposed therebetween.
- the axial cross section of the first hollow portion 51 is formed in a rectangle having a height dimension larger than the width dimension.
- the first hollow portion 51 is disposed at the center in the lateral direction (front-rear direction in FIG. 3) and the center in the front and back direction of the horizontal frame portion 11. Note that the portion surrounding the first hollow portion 51 in the horizontal frame portion 11 is formed such that the thickness t2 of the left wall portion and the right wall portion is larger than the thickness t1 of the front surface portion and the back surface portion.
- the front half of the first hollow portion 51 is formed by a groove 31 formed in the back surface 30a of the front side frame member 30. Further, the back half of the first hollow portion 51 is formed by a concave groove 41 formed on the surface 40 a of the frame member 40 on the back side. Thus, the 1st hollow part 51 is formed by match
- the left and right second hollow portions 52 and 52 are arranged on both the left and right sides with the two first hollow portions 51 and 51 interposed therebetween. Both the second hollow portions 52 and 52 are disposed at both ends in the longitudinal direction of the horizontal frame portion 11. The length of the second hollow portion 52 in the longitudinal direction is formed to be smaller than the length of the first hollow portion 51 in the longitudinal direction. A jig hole 60 is disposed between the adjacent first hollow portion 51 and second hollow portion 52 (see FIG. 4A).
- the axial cross section of the second hollow portion 52 has the same shape as the axial cross section of the first hollow portion 51 (see FIG. 4B). Further, as shown in FIG. 4A, the second hollow portion 52 is formed by the concave grooves 31 and 41 formed on the joining surfaces of the front and back frame members 30 and 40, similarly to the first hollow portion 51. ing.
- the rear horizontal frame portion 11 has two left and right first hollow portions 51 and 51 and two left and right second hollow portions 52 and 52, as in the front horizontal frame portion 11. , Is formed. Further, a jig hole 60 is disposed between the first hollow portion 51 and the second hollow portion 52 adjacent to each other in the rear lateral frame portion 11.
- the left vertical frame portion 12 is formed with two front and rear third hollow portions 53 and 53.
- the third hollow portion 53 extends linearly in the longitudinal direction of the vertical frame portion 12 (the front-rear direction in FIG. 3).
- the front and rear third hollow portions 53 and 53 are arranged with the center in the longitudinal direction of the left vertical frame portion 12 interposed therebetween.
- the axial cross section of the third hollow portion 53 has the same shape as the axial cross section of the first hollow portion 51 (see FIG. 4B). Further, as shown in FIG. 4A, the third hollow portion 53 is formed by the concave grooves 31 and 41 formed on the joint surfaces of the front and back frame members 30 and 40, similarly to the first hollow portion 51. ing.
- two right and left third hollow portions 53, 53 are formed in the right vertical frame portion 12, as in the left vertical frame portion 12.
- a method for manufacturing the above-described support frame 1A will be described.
- a rectangular tubular aluminum alloy extruded material is cut in a direction orthogonal to the axial direction, and two frame members 30 and 40 are prepared as shown in FIG.
- the groove 31 is formed on the back surface 30 a of the front frame member 30, and the groove 41 is formed on the front surface 40 a of the back frame member 40.
- the front-side frame member 30 and the back-side frame member 40 are overlapped on the front and back. That is, the two frame members 30 and 40 are overlapped so that the concave groove 31 of the front frame member 30 and the concave groove 41 of the rear frame member 40 face each other. Then, the back surface 30a of the front-side frame member 30 and the front surface 40a of the back-side frame member 40 are joined. Thereby, the frame 10 which consists of the two frame members 30 and 40 is formed.
- the joint surfaces of both frame members 30 and 40 are solid-phase joined.
- a bonding method such as diffusion bonding, vapor deposition using a focused ion beam (Focused Ion Beam), friction stir welding (Friction Stir Welding), or the like can be used.
- the concave grooves 31 and 41 of both the frame members 30 and 40 are overlapped, and the hollow portions 51 to 53 (see FIG. 3) are formed by the concave grooves 31 and 41 on the front and back sides.
- the through hole 20 is formed between the adjacent first hollow portions 51, 51 in the front lateral frame portion 11. Further, a jig hole 60 is formed between the adjacent first hollow portion 51 and the second hollow portion 52 in the front and rear horizontal frame portions 11 and 11.
- Fig.4 (a) 1 A of support frames provided with the frame 10 which consists of front and back two frame members 30 and 40 are formed. Note that the through hole 20 and the jig hole 60 may be formed on the joint surfaces of the both frame members 30 and 40 before the both frame members 30 and 40 are joined.
- an adhesive layer 4b made of polybutene resin, polyvinyl acetate resin, acrylic resin, or the like is formed on the back surface 10b of the frame 10. Then, the surface Ma of the transparent substrate M is overlapped on the adhesive layer 4b on the back side, and the support frame 1A is pressed against the transparent substrate M, whereby the support frame 1A is bonded to the surface Ma of the transparent substrate M via the adhesive layer 4b. .
- a plurality of hollow portions 51 to 53 are formed in the frame body 10, as shown in FIG.
- the support frame 1A has a hollow structure
- the cross-sectional secondary moment of the frame 10 is reduced, and the rigidity of the support frame 1A is reduced.
- the restoring force for the support frame 1A to return to the original distorted shape is reduced.
- a flat shape can be maintained following M.
- the circuit pattern of the transparent substrate M can be accurately transferred to the resist on the wafer.
- the support frame 1A since the through hole 20 is formed in the frame body 10, after the pellicle film 2 and the transparent substrate M (see FIG. 2) are bonded to the support frame 1A, the inside of the support frame 1A is vacuumed. It is possible to prevent a pressure difference between the space and the external space.
- the above-mentioned support frame 1A of a hollow structure can be manufactured easily by joining the joining surfaces of the two frame members 30 and 40. FIG. it can. And by joining both the frame members 30 and 40 to a solid phase, both the frame members 30 and 40 can be joined with high accuracy and the strength of the support frame 1A can be prevented from being lowered.
- the frame members 30 and 40 are cut out from a rectangular tube-shaped extruded material, but as shown in FIG.
- the frame members 30 and 40 may be formed.
- the two flat plates 5 and 5 are hollowed out to form the two frame members 30 and 40, and the concave grooves 31 and 41 are formed in both the frame members 30 and 40. 40 is joined.
- Positioning holes 70 are formed in a pair of corners on the diagonal line of the flat plate 5 shown in FIG. When joining the two frame members 30 and 40, the frame members 30 and 40 can be joined with high accuracy by matching the positioning holes 70 of the both frame members 30 and 40.
- the positioning hole 70 is formed in a portion to be cut when the outer peripheral portion of the frame body 10 is cut.
- the two frame members 30 and 40 are solid-phase bonded, but the bonding method is not limited.
- both the frame members 30 and 40 are connected. May be joined by a welding method such as arc welding or resistance welding.
- the support frame 1 ⁇ / b> A having a hollow structure is formed by joining two frame members 30 and 40, but an object can be modeled by the layered modeling method.
- the support frame made of aluminum alloy may be formed by an apparatus such as a 3D printer.
- the frame body of the support frame is configured as one member.
- the front and back frame members 30 and 40 are joined, but the inner frame member 35 is arranged inside the outer frame member 45 as in the support frame 1B shown in FIG.
- the outer peripheral surface of the inner frame member 35 and the inner peripheral surface of the outer frame member 45 may be joined.
- the joint portion is not exposed on the inner and outer peripheral surfaces of the support frame 1B.
- the concave groove 31 is formed on the outer peripheral surface of the inner frame member 35
- the concave groove 41 is formed on the inner peripheral surface of the outer frame member 45, so that the inner and outer frame members 35, 45 are formed.
- the hollow portion 50 is formed by the concave grooves 31 and 41.
- the concave grooves 31, 41 are formed in both of the two frame members 30, 40.
- the groove 41 may be formed only on the surface 40 a of the frame member 40.
- the hollow portion 50 is formed by closing the concave groove 41 of the frame member 40 on the back side with the frame member 30 on the front side.
- the hollow portion 50 may be formed by forming a concave groove only on the back surface 30 a of the front-side frame member 30 and closing the concave groove of the front-side frame member 30 with the rear-side frame member 40.
- a plurality of hollow portions 51 to 53 are formed in the frame 10, but the number and arrangement thereof are not limited. For example, you may form the hollow part bent in the corner
- FIG. 4B the axial cross sections of the hollow portions 51 to 53 (see FIG. 3) are formed in a rectangular shape, but the shape is not limited.
- the axial cross section of the front frame member 30 and the axial cross section of the back frame member 40 are formed in the same shape.
- the height of the 40 axial cross sections may be different.
- the axial cross section of the frame 10 of this embodiment is formed in the rectangle, the shape is not limited, For example, the axial cross section of the frame 10 may be square.
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Abstract
Description
そして、透明基板に歪みが生じると、透明基板の回路パターンをウエハ上のレジストに転写するときに、回路パターンが正規の位置からずれてしまうという問題がある。
また、枠体に貫通孔が形成されているため、支持枠にペリクル膜および透明基板に接着した後に、真空中において支持枠の内部空間と外部空間とに圧力差が生じるのを防ぐことができる。
なお、固相接合としては、拡散接合、集束イオンビーム(Focused Ion Beam)を用いた蒸着、摩擦攪拌接合(Friction Stir Welding)などの接合方法を用いることができる。
また、本発明の製造方法によって形成された支持枠は、中空部が外部空間に通じていないため、中空部に塵や加工時の処理液などの異物が入るのを防ぐことができる。
また、本発明の製造方法によれば、中空構造の支持枠を容易に製造することができる。
なお、本実施形態の各図面では、支持枠の構成を分かり易く説明するために、支持枠の各部を適宜に模式的に示している。
以下の説明において、前後左右および表裏とは、支持枠を分かり易く説明するために設定したものであり、支持枠の構成を特定するものではない。
ペリクルPは、透明基板Mに描かれた回路パターン(図示せず)の全体を囲う支持枠1Aと、支持枠1Aの表面に覆設されたペリクル膜2と、を備えている。
両横枠部11,11は、枠体10の長辺となる部分であり、両縦枠部12,12は、枠体10の短辺となる部分である。
横枠部11および縦枠部12の軸断面は、図2に示すように、幅寸法よりも高さ寸法が大きい長方形に形成されている。
ペリクル膜2を枠体10の表面10aに重ねたときには、ペリクル膜2によって枠体10の表面10a全体が覆われる。
両枠部材30,40は同一形状の部材であり、両枠部材30,40は表裏逆向きに配置されている。そして、表側の枠部材30の裏面30aと裏側の枠部材40の表面40aとが接合されている。
なお、本実施形態では、図3に示すように、前側の横枠部11の左右方向の中央に貫通孔20が形成されているが、貫通孔20の配置は限定されるものではなく、例えば、後側の横枠部11や左右の縦枠部12,12に形成してもよい。さらに、貫通孔20の数も限定されるものではなく、例えば、横枠部11と縦枠部12とに貫通孔20を一つずつ形成してもよく、または、前後の横枠部11,11の両方または左右の縦枠部12,12の両方に貫通孔20を形成してもよい。
なお、本実施形態では、図4(a)に示すように、枠体10の高さ方向の中央に治具穴60が配置されているが、治具穴60の高さは限定されるものではなく、使用する治具に応じて治具穴60の高さが設定される。
治具穴60は、図3に示すように、前側の横枠部11の左右両端部の近くに形成されるとともに、後側の横枠部11の左右両端部の近くに形成されている。すなわち、枠体10の前後の横枠部11,11には、それぞれ左右二つの治具穴60が形成されている。
なお、横枠部11において第一中空部51を囲む部位は、表面部および裏面部の肉厚t1よりも左壁部および右壁部の肉厚t2が大きく形成されている。
隣り合う第一中空部51と第二中空部52との間には、治具穴60が配置されている(図4(a)参照)。
また、後側の横枠部11には、隣り合う第一中空部51と第二中空部52との間に治具穴60が配置されている。
前後の第三中空部53,53は、左側の縦枠部12の長手方向の中央を挟んで配置されている。
まず、角筒状のアルミニウム合金製の押出材を軸方向に直交する方向で切断して、図5(a)に示すように、二つの枠部材30,40を用意する。
続いて、表側の枠部材30の裏面30aに凹溝31を形成するとともに、裏側の枠部材40の表面40aに凹溝41を形成する。
その後、表側の枠部材30の裏面30aと裏側の枠部材40の表面40aとを接合する。これにより、二つの枠部材30,40からなる枠体10が形成される。
また、前後の横枠部11,11において、隣り合う第一中空部51と第二中空部52との間に治具穴60を形成する。
これにより、図4(a)に示すように、表裏二つの枠部材30,40からなる枠体10を備えた支持枠1Aが形成される。
なお、両枠部材30,40を接合する前に、両枠部材30,40の接合面に貫通孔20および治具穴60を形成してもよい。
そして、表側の接着層4aにペリクル膜2を重ねることで、ペリクル膜2が接着層4aを介して枠体10の表面10aに接着される。
そして、裏側の粘着層4bに透明基板Mの表面Maを重ねて、支持枠1Aを透明基板Mに押し付けることで、支持枠1Aが粘着層4bを介して透明基板Mの表面Maに接着される。
これにより、図2に示すように、支持枠1Aを平坦な透明基板Mに接着した後に、支持枠1Aが元の歪んだ形状に戻ろうとする復元力が小さくなるため、支持枠1Aを透明基板Mに倣って平坦な形状に保つことができる。
このように、支持枠1Aおよび透明基板Mを平坦な状態に保つことできるため、透明基板Mの回路パターンをウエハ上のレジストに精度良く転写することができる。
例えば、本実施形態では、角筒状の押出材から枠部材30,40(図5(a)参照)を切り出しているが、図6に示すように、一枚のアルミニウム合金製の平板5から枠部材30,40を形成してもよい。
この構成では、二枚の平板5,5を中抜き加工して二つの枠部材30,40を形成し、両枠部材30,40に凹溝31,41を形成した後に、両枠部材30,40を接合する。
図6に示す平板5の対角線上の一対の角部には位置決め孔70,70が形成されている。二つの枠部材30,40を接合するときには、両枠部材30,40の位置決め孔70を合わせることで、両枠部材30,40を精度良く接合することができる。なお、位置決め孔70は、枠体10の外周部を切削加工するときに、切削される部位に形成されている。
また、支持枠1Bでは、内側の枠部材35の外周面に凹溝31を形成するとともに、外側の枠部材45の内周面に凹溝41が形成されており、内外の枠部材35,45の凹溝31,41によって中空部50が形成されている。
この構成では、裏側の枠部材40の凹溝41が表側の枠部材30によって塞がれることで中空部50が形成されている。
なお、表側の枠部材30の裏面30aのみに凹溝を形成し、表側の枠部材30の凹溝を裏側の枠部材40によって塞ぐことで中空部50を形成してもよい。
また、本実施形態では、図4(b)に示すように、各中空部51~53(図3参照)の軸断面が長方形に形成されているが、その形状は限定されるものではない。
また、本実施形態の枠体10の軸断面は長方形に形成されているが、その形状は限定されるものではなく、例えば、枠体10の軸断面が正方形でもよい。
2 ペリクル膜
4a 接着層
4b 粘着層
5 平板
10 枠体
11 横枠部
12 縦枠部
20 貫通孔
30 表側の枠部材
30a 裏面
31 凹溝
40 裏側の枠部材
40a 表面
41 凹溝
51 第一中空部
52 第二中空部
53 第三中空部
60 治具穴
M 透明基板
P ペリクル
Claims (4)
- アルミニウム合金製の枠体を備え、
前記枠体の表面にペリクル膜が接着され、前記枠体の裏面に透明基板が接着されるペリクル用支持枠であって、
前記枠体の内部には、複数の中空部が前記枠体の周方向に並設されており、
隣り合う二つの前記中空部の間に、前記枠体の外周面から内周面に至る貫通孔が形成されていることを特徴とするペリクル用支持枠。 - 前記枠体は、二つの枠部材を接合して形成されており、
前記両枠部材の接合面の少なくとも一方に複数の凹溝が周方向に並設され、
前記凹溝によって前記中空部が形成されていることを特徴とする請求項1に記載のペリクル用支持枠。 - アルミニウム合金製の二つの枠部材からなるペリクル用支持枠の製造方法であって、
前記両枠部材の接合面の少なくとも一方に凹溝を形成する段階と、
前記両枠部材の接合面同士を接合し、前記凹溝によって中空部を形成する段階と、
を備えていることを特徴とするペリクル用支持枠の製造方法。 - 前記両枠部材を固相接合することを特徴とする請求項3に記載のペリクル用支持枠の製造方法。
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US15/524,234 US10642151B2 (en) | 2014-11-04 | 2015-09-09 | Pellicle support frame and production method |
EP15856945.9A EP3217221B1 (en) | 2014-11-04 | 2015-09-09 | Pellicle support frame and production method |
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EP3217221B1 (en) | 2022-04-27 |
KR20170080582A (ko) | 2017-07-10 |
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US20170343894A1 (en) | 2017-11-30 |
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