JP4488500B2 - Mask deflection correction device - Google Patents

Mask deflection correction device Download PDF

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JP4488500B2
JP4488500B2 JP2004185286A JP2004185286A JP4488500B2 JP 4488500 B2 JP4488500 B2 JP 4488500B2 JP 2004185286 A JP2004185286 A JP 2004185286A JP 2004185286 A JP2004185286 A JP 2004185286A JP 4488500 B2 JP4488500 B2 JP 4488500B2
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mask
deflection
cylinder
pressing
stage
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JP2006010860A (en
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一生 渡辺
謙作 鈴木
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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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
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/70—Microphotolithographic exposure; Apparatus therefor
    • G03F7/70691—Handling of masks or workpieces
    • G03F7/70783—Handling stress or warp of chucks, masks or workpieces, e.g. to compensate for imaging errors or considerations related to warpage of masks or workpieces due to their own weight

Description

本発明は、マスク上方から光を照射してガラス基板にパターンを形成する基板露光装置において、前記マスクの撓みを補正するマスク撓み補正機構に関し、特に、サイズが大型化したマスクの自重による撓みを簡単に補正することができるマスクの撓み補正装置に関する。   The present invention relates to a mask deflection correction mechanism that corrects the deflection of the mask in a substrate exposure apparatus that forms a pattern on a glass substrate by irradiating light from above the mask, and in particular, the deflection due to the weight of the mask whose size is increased. The present invention relates to a mask deflection correction device that can be easily corrected.

図５は、従来のマスクの撓み補正装置の構成を示す図である。
従来のマスクの撓み補正装置が適用される基板露光装置は、ガラス基板３を上面に保持する露光チャック１と、前記ガラス基板３の上方からパターンを転写するマスク２を上面に保持するマスクホルダ４とを備え、前記マスク２とガラス基板３との間に所定の微少間隔をあけてマスク２上方から光を照射してガラス基板３にパターンを形成する。 FIG. 5 is a diagram showing a configuration of a conventional mask deflection correction apparatus.
A substrate exposure apparatus to which a conventional mask deflection correction apparatus is applied includes an exposure chuck 1 for holding a glass substrate 3 on the upper surface, and a mask holder 4 for holding a mask 2 for transferring a pattern from above the glass substrate 3 on the upper surface. And a pattern is formed on the glass substrate 3 by irradiating light from above the mask 2 with a predetermined minute interval between the mask 2 and the glass substrate 3.

前記マスクホルダ４は、マスク２の対向する両側二辺だけを保持するように対向する二つのホルダ部材５ａ，５ｂで構成し、このマスクホルダ４に保持されるマスク２の両側二辺の縁部を上方から押圧してマスク２の撓みを補正するマスク押え部７ａ，７ｂを備える（例えば、特許文献１参照）。   The mask holder 4 is composed of two holder members 5a and 5b facing each other so as to hold only two opposite sides of the mask 2, and edges of both sides of the mask 2 held by the mask holder 4 Are provided with mask pressing portions 7a and 7b for correcting the deflection of the mask 2 by pressing the upper side from above (see, for example, Patent Document 1).

特開２００１−１０９１６０号公報（図１参照）JP 2001-109160 A (see FIG. 1)

しかしながら、従来のマスクの撓み補正装置は上述のように構成されていたため、下記のような課題があった。
液晶用ＴＦＴ（Ｔｈｉｎ Ｆｉｌｍ Ｔｒａｎｓｉｓｔｏｒ）、カラーフィルタ、ＰＤＰ（Ｐｌａｓｍａ Ｄｉｓｐｌａｙ Ｐａｎｅｌ）等のパネルサイズの大型化や、多面付けによる生産効率の向上により、処理基板のサイズは大型化している。そのため、その主たるプロセス装置である露光機も大型化の必要がある。この露光機の大型化における課題の一つは、マスクの大型化に伴うマスクの自重による撓みである。 However, since the conventional mask deflection correction apparatus is configured as described above, it has the following problems.
Due to the increase in panel size such as TFTs for liquid crystals (Thin Film Transistors), color filters, PDPs (Plasma Display Panels) and the like, and the improvement in production efficiency due to multi-face mounting, the size of the processing substrate has been increased. Therefore, it is necessary to increase the size of the exposure apparatus which is the main process apparatus. One of the problems in increasing the size of the exposure apparatus is bending due to the weight of the mask accompanying the increase in the size of the mask.

この撓みを解決するために、上述の特許文献１記載の発明がなされているが、この露光装置のようにマスクホルダをマスクより下方に設けている場合に、ステージが相直交するＸＹ方向に移動する駆動装置と組み合わせようとすると、ＸＹ方向の双方についてステージの移動ストロークを考慮する必要があり、マスクの下側にマスク支持柱を設置することは、非常に困難であった。さらに、露光ギャップは通常１００μｍ程度であることもあり、マスクの下側にマスク支持柱を設置することは、非常に困難であった。
このため、特許文献１記載の発明のようにマスクの補正機構をマスクの下側に有する構成では、プロキシミティー露光装置の中でも一括露光ステップ露光装置または１軸ステップ露光装置にしか対応できないという課題があった。
マスクのサイズは、700ｍｍ×800ｍｍあるいは800×920ｍｍであるため、液晶ワークの規格サイズである第４世代(680mm×880mmや730mm×920mm)ないし第５世代(1100×1250や1100×1300)に対応するためには、２軸（ＸＹ軸）ステップ露光装置が不可欠であった。 In order to solve this bending, the invention described in Patent Document 1 described above has been made, but when the mask holder is provided below the mask as in this exposure apparatus, the stage moves in the XY directions orthogonal to each other. When combining with the driving device, it is necessary to consider the movement stroke of the stage in both the XY directions, and it is very difficult to install the mask support column below the mask. Furthermore, the exposure gap is usually about 100 μm, and it is very difficult to install a mask support column below the mask.
For this reason, in the configuration having the mask correction mechanism on the lower side of the mask as in the invention described in Patent Document 1, there is a problem that only the batch exposure step exposure apparatus or the uniaxial step exposure apparatus can be handled among the proximity exposure apparatuses. there were.
Because the mask size is 700mm x 800mm or 800 x 920mm, it corresponds to the standard size of liquid crystal workpieces of 4th generation (680mm x 880mm or 730mm x 920mm) to 5th generation (1100 x 1250 or 1100 x 1300) In order to achieve this, a two-axis (XY axis) step exposure apparatus is indispensable.

本発明は、上述のような課題を解決するためになされたものであり、比較的簡単な構成で、２軸露光装置に対応可能で、マスクの自重による撓みを容易かつ確実に補正できるマスクの撓み補正装置を提供することを目的とする。   The present invention has been made in order to solve the above-described problems, and can be used for a biaxial exposure apparatus with a relatively simple configuration and can easily and reliably correct the deflection due to the weight of the mask. An object is to provide a deflection correction apparatus.

本発明のマスクの撓み補正装置は、ステージ上に載置するワークをＸＹ方向に移動させる２軸駆動ステージ装置と、該２軸駆動ステージ装置の上方に吊り下げられる露光装置用の上面四辺形のマスクと、該マスクのエッジ領域を、各辺の中央部において吊り下げる複数の支持部と、前記マスクの四隅の各々において、該マスクの上面側を下側に向けて押圧する押圧手段と、前記２軸駆動ステージ装置のステージの駆動ストロークによって確定される領域よりも外側に配設された、前記押圧手段を保持する保持手段と、前記押圧手段を前記マスクの押圧部に当接させた時点における前記マスクの撓み量を計測すると共に、該撓み量を補正するために前記押圧手段を駆動制御する駆動手段と、を備える。 Deflection correction apparatus of the mask of the present invention, a two-axis driving stage device for moving the workpiece to be placed on a stage in the XY direction, the upper surface quadrilateral for suspended that exposure device above the two-axis stage system A mask , a plurality of support portions that suspend the edge region of the mask at the center of each side , and a pressing unit that presses the upper surface side of the mask downward at each of the four corners of the mask, than the area which is determined by the drive stroke of the stage of the two-axis driving stage device disposed outside, and holding means for holding said pushing means, the time when the pressing means is brought into contact with the pressing portion of the mask together to measure the amount of deflection of the mask in, and a driving means for driving and controlling said pressing means to correct the deflection amount.

また、前記押圧手段は、下方に向かって延伸することにより前記マスクを押圧可能に配設されたシリンダである。   Moreover, the said press means is a cylinder arrange | positioned so that the said mask can be pressed by extending | stretching below.

本発明のマスクの撓み補正装置は、エッジ領域内の複数の支持部によって２軸駆動ステージ装置の上方に吊り下げられた露光装置のマスクの撓みを補正する装置であって、前記マスクのエッジ領域内において支持部同士の間に設けられ、前記マスクの上面側を下側に向けて押圧する押圧手段と、前記２軸駆動ステージ装置のステージの駆動ストロークによって確定される領域よりも外側に配設され、前記押圧手段を保持する保持手段と、前記押圧手段を前記マスクの押圧部に当接させた時点における前記マスクの撓み量を計測すると共に、この撓み量を補正するために、前記押圧手段を駆動制御する駆動手段とを備えるので、シリンダで調整することにより、撓みを所定量以下にすることができ、特に大型のマスクを用いた場合に露光装置のスループットを向上させることができる。   The mask deflection correction apparatus of the present invention is a device for correcting the mask deflection of an exposure apparatus suspended above a biaxially driven stage device by a plurality of support portions in the edge region, the edge region of the mask Provided between the support portions and disposed outside the region determined by the driving stroke of the stage of the two-axis drive stage device and the pressing means for pressing the upper surface side of the mask downward. And holding means for holding the pressing means, and measuring the amount of deflection of the mask at the time when the pressing means is brought into contact with the pressing portion of the mask, and for correcting the amount of deflection, the pressing means And a drive means for controlling the driving of the exposure apparatus, so that the deflection can be reduced to a predetermined amount or less by adjusting the cylinder, and particularly when a large mask is used, It is possible to improve the throughput.

また、前記押圧手段は、下方に向かって延伸することにより前記マスクを押圧可能に配設されたシリンダであるので、マスクの撓みを自在に補正することができる。   Further, since the pressing means is a cylinder arranged so as to be able to press the mask by extending downward, it is possible to freely correct the bending of the mask.

以下、本発明の最良の形態について図を用いて説明する。
図１は、本発明のマスクの撓み補正装置の構成を概略的に示す斜視図である。
図２は、図１に示すマスクの撓み補正装置の構成を概略的に示す側面図である。
なお、図１ではＸＹステージを省略すると共に、図２では後述する支持装置１２のうちの図中手前側のものを省略する。
図１に示すように、上面四辺形の板状体のマスク１０は、マスク１０の外周部付近のエッジ領域をマスク１０の上面側から固定する枠状のマスクホルダ１１を介して支持装置１２によって吊り下げられている。マスクホルダ１１の四辺の各中央部は支持装置１２のアーム部１２Ａに固定されている。すなわち、このマスク１０は、エッジ領域内の複数の支持部によって吊り下げられている。 Hereinafter, the best mode of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view schematically showing the configuration of a mask deflection correcting apparatus of the present invention.
FIG. 2 is a side view schematically showing the configuration of the mask deflection correction apparatus shown in FIG.
In FIG. 1, the XY stage is omitted, and in FIG. 2, the front side of the support device 12 described later is omitted.
As shown in FIG. 1, a mask 10 having a plate shape having an upper surface quadrilateral is supported by a support device 12 via a frame-shaped mask holder 11 that fixes an edge region near the outer periphery of the mask 10 from the upper surface side of the mask 10. It is suspended. Each central part of the four sides of the mask holder 11 is fixed to the arm part 12 </ b> A of the support device 12. That is, the mask 10 is suspended by a plurality of support portions in the edge region.

マスクホルダ１１の四隅には、マスクホルダ１１の上面側を下方に押圧するための押圧手段であるシリンダ１３が配設されている。このシリンダ１３は、シリンダ保持装置１４によって保持されており、また、マスク１０のエッジ領域（マスク１０の上面のうち、転写パターンを含まない外周付近の領域）内において支持部同士の間に設けられている。   Cylinders 13 serving as pressing means for pressing the upper surface side of the mask holder 11 downward are disposed at the four corners of the mask holder 11. The cylinder 13 is held by a cylinder holding device 14 and is provided between support portions in an edge region of the mask 10 (a region near the outer periphery of the upper surface of the mask 10 that does not include a transfer pattern). ing.

ここで、図２に示すＸＹ駆動ワークステージ装置１６は、ステージ１６Ａ上にワーク１７を載置しており、ステージ１６Ａは、図中において左右及び図面を垂直に貫く方向に移動するように構成されている。支持装置１２及びシリンダ保持装置１４は、ステージ１６Ａの移動ストロークを考慮した領域より外側に配置されている。   Here, the XY drive work stage device 16 shown in FIG. 2 has a work 17 placed on a stage 16A, and the stage 16A is configured to move in the direction that penetrates right and left in the drawing and the drawing vertically. ing. The support device 12 and the cylinder holding device 14 are disposed outside the region in consideration of the moving stroke of the stage 16A.

また、このシリンダ１３は、コンピュータ制御される駆動手段である駆動装置１５に接続されており、駆動装置１５からの駆動指令に基づき、シリンダ１３を延伸してマスクホルダ１１の四隅の上面側を下方に押圧すると共に、押圧力を零にした状態においてマスクホルダ１１の変形量（すなわちマスク１０の変形量（撓み量））を計測できるように構成されている。
なお、図２に示す状態では、マスク１０は撓んでいる。 The cylinder 13 is connected to a drive device 15 that is a computer-controlled drive means. Based on a drive command from the drive device 15, the cylinder 13 is extended and the upper surface sides of the four corners of the mask holder 11 are moved downward. The deformation amount of the mask holder 11 (that is, the deformation amount (deflection amount) of the mask 10) can be measured in a state where the pressing force is zero.
In the state shown in FIG. 2, the mask 10 is bent.

マスクホルダ１１の四辺の中央部が支持装置１２のアーム部１２Ａによって吊り下げられているため、シリンダ１３をフリーにした状態における板状体のマスク１０の撓みは、板状体の中央部が下側に反ると共に、四隅が上側に反るようにして生じる。このとき、駆動装置１５でシリンダ１３を駆動し、シリンダ１３の先端がマスクホルダ１１の四隅に当接した時点（シリンダ１３がマスクホルダ１１に押圧力を与えていない状態）でのマスク１０の変形量を計測すれば、マスク１０の撓みを無くすために必要なシリンダ１３の駆動量を把握することができる。   Since the central part of the four sides of the mask holder 11 is suspended by the arm part 12A of the support device 12, the bending of the plate-like mask 10 in the state in which the cylinder 13 is free is performed at the central part of the plate-like body. It is caused to warp to the side and warp the four corners to the upper side. At this time, the cylinder 13 is driven by the driving device 15, and the mask 10 is deformed when the tip of the cylinder 13 comes into contact with the four corners of the mask holder 11 (the cylinder 13 does not apply pressure to the mask holder 11). If the amount is measured, the driving amount of the cylinder 13 necessary for eliminating the bending of the mask 10 can be grasped.

図３は、本発明のマスクの撓み補正装置の駆動装置１５内における処理手順を示すフローチャートである。
図２に示すように、まず、マスク１０を設置し、固定した後に、ステップＳ１としてマスク１０の撓み量を測定すべくシリンダ１３を延伸させ、シリンダ１３の先端がマスクホルダ１１の四隅に当接した時点（シリンダ１３がマスクホルダ１１に押圧力を与えていない状態）でのマスク１０の撓み量を計測する。 FIG. 3 is a flowchart showing a processing procedure in the driving device 15 of the mask deflection correcting apparatus of the present invention.
As shown in FIG. 2, first, after the mask 10 is installed and fixed, the cylinder 13 is extended to measure the amount of deflection of the mask 10 in step S <b> 1, and the tip of the cylinder 13 contacts the four corners of the mask holder 11. The amount of deflection of the mask 10 at the time (when the cylinder 13 does not apply a pressing force to the mask holder 11) is measured.

次にステップＳ２において、マスク１０の撓み量を演算する。マスク１０の撓みが無いと判定した場合は、フローはステップＳ３に進行し、シリンダ１３を固定する。すなわち、この場合、シリンダ１３はマスク１０に押圧力を与えることなく当接した状態で固定される。固定後は露光を行うことができる。   Next, in step S2, the amount of deflection of the mask 10 is calculated. If it is determined that the mask 10 is not bent, the flow proceeds to step S3 and the cylinder 13 is fixed. That is, in this case, the cylinder 13 is fixed in contact with the mask 10 without applying a pressing force. After fixing, exposure can be performed.

一方、ステップＳ２において撓みが有ると判定した場合は、フローはステップＳ１にリターンし、シリンダ１３を延伸させる。このときは、ステップＳ２において測定した撓み量分だけシリンダ１３を延伸させればよい。
このステップＳ２が終了するとフローはステップＳ２に再び進行し、撓みが無くなるまでこのステップＳ１及びＳ２を繰り返し行うことになる。 On the other hand, when it determines with there being bending in step S2, a flow returns to step S1 and the cylinder 13 is extended. At this time, the cylinder 13 may be extended by the amount of deflection measured in step S2.
When step S2 ends, the flow proceeds to step S2 again, and steps S1 and S2 are repeated until there is no deflection.

すなわち、撓みが無くなった時点でフローはステップＳ３に進行し、シリンダ１３を固定できるようになる。
図４は、ステップＳ３のフローが終了した時点における本発明のマスクの撓み補正装置の構成を概略的に示す側面図である。
図２に比べるとシリンダ１３が延伸され、マスク１０のたわみが少なくなっているのが分かる。
なお、ステップＳ２における撓みの有無の判定に際しては、撓み量が零であるか否かを判定する方法に限らず、撓み量が所定量以下であるかを判定するようにしてもよい。 That is, when the deflection disappears, the flow proceeds to step S3, and the cylinder 13 can be fixed.
FIG. 4 is a side view schematically showing the configuration of the mask deflection correction apparatus of the present invention at the time when the flow of step S3 is completed.
As compared with FIG. 2, it can be seen that the cylinder 13 is extended and the deflection of the mask 10 is reduced.
Note that the determination of whether or not there is a bend in step S2 is not limited to a method of determining whether or not the bend amount is zero, and it may be determined whether the bend amount is a predetermined amount or less.

以上、本発明のマスクの撓み補正装置によれば、マスク１０の設置時にマスク１０の撓み量を測定し、シリンダ１３で調整することにより、撓みを所定量以下にすることができるので、特に大型のマスクを用いた場合に露光装置のスループットを向上させることができる。   As described above, according to the mask deflection correction apparatus of the present invention, the deflection amount of the mask 10 is measured when the mask 10 is installed and adjusted by the cylinder 13, so that the deflection can be made to be a predetermined amount or less. When the mask is used, the throughput of the exposure apparatus can be improved.

なお、以上では、マスク１０が上面四辺形の板状体であり、各辺の中央部を支点として吊り下げられている場合について説明したが、マスク１０の形状は上面四辺形の板状対に限られず、板状対であれば上面は多角形や円形等の任意の形状であっても構わない。そして、アーム部１２Ａによる支点は３点以上有ればよく、シリンダ１３も３点以上あればよい。ただし支点とシリンダ１３の押圧点（シリンダ１３の押圧力の作用点となる点）とは、シリンダ１３がマスクホルダ１１の上面を下方に押圧する場合にマスク１０の撓みが無くなるように構成されていればよい。   In the above description, the mask 10 is an upper surface quadrangular plate-like body and is suspended from the center of each side as a fulcrum. However, the shape of the mask 10 is an upper quadrilateral plate-like pair. The upper surface may be any shape such as a polygon or a circle as long as it is a plate-like pair. And the fulcrum by arm part 12A should just be three or more points, and cylinder 13 should just be three or more points. However, the fulcrum and the pressing point of the cylinder 13 (the point serving as the point of action of the pressing force of the cylinder 13) are configured such that the bending of the mask 10 is eliminated when the cylinder 13 presses the upper surface of the mask holder 11 downward. Just do it.

本発明のマスクの撓み補正装置の構成を概略的に示す図である。It is a figure which shows schematically the structure of the bending correction apparatus of the mask of this invention. 図１に示すマスクの撓み補正装置の構成を概略的に示す側面図である。It is a side view which shows schematically the structure of the bending correction apparatus of the mask shown in FIG. 本発明のマスクの撓み補正装置の駆動装置内における処理手順を示すフローチャートである。It is a flowchart which shows the process sequence in the drive device of the bending correction apparatus of the mask of this invention. ステップＳ３のフローが終了した時点における本発明のマスクの撓み補正装置の構成を概略的に示す側面図である。It is a side view which shows roughly the structure of the bending correction apparatus of the mask of this invention at the time of complete | finishing the flow of step S3. 従来のマスクの撓み補正装置の構成を示す図である。It is a figure which shows the structure of the bending correction apparatus of the conventional mask.

符号の説明Explanation of symbols

１０ マスク、１１ マスクホルダ、１２ 支持装置、１２Ａ アーム部、１３ シリンダ、１４ シリンダ保持装置、１５ 駆動装置、１６ ＸＹ駆動ワークステージ装置、１６Ａ ステージ、１７ ワーク。   DESCRIPTION OF SYMBOLS 10 Mask, 11 Mask holder, 12 Support apparatus, 12A Arm part, 13 Cylinder, 14 Cylinder holding apparatus, 15 Drive apparatus, 16 XY drive work stage apparatus, 16A stage, 17 Workpieces.

Claims (2)

ステージ上に載置するワークをＸＹ方向に移動させる２軸駆動ステージ装置と、
該２軸駆動ステージ装置の上方に吊り下げられる露光装置用の上面四辺形のマスクと、
該マスクのエッジ領域を、各辺の中央部において吊り下げる複数の支持部と、
前記マスクの四隅の各々において、該マスクの上面側を下側に向けて押圧する押圧手段と、
前記２軸駆動ステージ装置のステージの駆動ストロークによって確定される領域よりも外側に配設された、前記押圧手段を保持する保持手段と、
前記押圧手段を前記マスクの押圧部に当接させた時点における前記マスクの撓み量を計測すると共に、該撓み量を補正するために前記押圧手段を駆動制御する駆動手段と、
を備えることを特徴とするマスクの撓み補正装置。 A two-axis drive stage device for moving a workpiece placed on the stage in the XY directions;
A mask of the upper surface quadrilateral for suspended that exposure device above the two-axis driving stage device,
A plurality of support portions that suspend the edge region of the mask at the center of each side;
In each of the four corners of the mask, and pressing means for pressing the upper surface of the mask on the lower side,
Than the area which is determined by the drive stroke of the stage of the two-axis driving stage device disposed outside, and holding means for holding said pushing means,
Together to measure the amount of deflection of the mask at the time of said pressing means is in contact with the pressing portion of the mask, and driving means for driving and controlling said pressing means to correct the deflection amount,
A mask deflection correction apparatus comprising: 前記押圧手段は、下方に向かって延伸することにより前記マスクを押圧可能に配設されたシリンダであることを特徴とする請求項１記載のマスクの撓み補正装置。   2. The mask deflection correcting device according to claim 1, wherein the pressing means is a cylinder arranged to be able to press the mask by extending downward.
JP2004185286A 2004-06-23 2004-06-23 Mask deflection correction device Active JP4488500B2 (en)

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JP5493279B2 (en) * 2008-03-17 2014-05-14 凸版印刷株式会社 Exposure equipment
JP5262265B2 (en) * 2008-04-21 2013-08-14 凸版印刷株式会社 Substrate exposure equipment
JP2010032942A (en) * 2008-07-31 2010-02-12 Panasonic Corp Exposure method, exposure apparatus and method for manufacturing flat panel display
JP5523206B2 (en) * 2010-05-31 2014-06-18 株式会社トプコン Exposure equipment
CN104635429B (en) * 2013-11-14 2017-01-04 上海微电子装备有限公司 Mask gravity-compensated device for lithographic equipment
CN106444294B (en) * 2016-10-17 2018-05-11 上海华力集成电路制造有限公司 A kind of mask plate fixed system

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