JP2004237636A - Method and device for pasting film - Google Patents

Method and device for pasting film Download PDF

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Publication number
JP2004237636A
JP2004237636A JP2003030264A JP2003030264A JP2004237636A JP 2004237636 A JP2004237636 A JP 2004237636A JP 2003030264 A JP2003030264 A JP 2003030264A JP 2003030264 A JP2003030264 A JP 2003030264A JP 2004237636 A JP2004237636 A JP 2004237636A
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Prior art keywords
film
roll
substrate
rear end
pressure roll
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JP2003030264A
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Japanese (ja)
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JP3774701B2 (en
Inventor
Koji Hironaka
浩二 弘中
Fumiaki Numajiri
文晶 沼尻
Katsuyoshi Watanabe
勝義 渡辺
Takeshi Ishida
剛 石田
Takeshi Fujii
健 藤井
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Hitachi Plant Technologies Ltd
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Hitachi Industries Co Ltd
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Priority to JP2003030264A priority Critical patent/JP3774701B2/en
Priority to TW092114756A priority patent/TWI236965B/en
Priority to CNB031466583A priority patent/CN1307033C/en
Priority to KR1020030052640A priority patent/KR100550649B1/en
Publication of JP2004237636A publication Critical patent/JP2004237636A/en
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Publication of JP3774701B2 publication Critical patent/JP3774701B2/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207Heat-activated adhesive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00Ancillary operations in connection with laminating processes
    • B32B38/18Handling of layers or the laminate
    • B32B38/1875Tensioning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B32B2037/1063Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure using an electrostatic force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207Heat-activated adhesive
    • B32B2037/1215Hot-melt adhesive
    • B32B2037/1223Hot-melt adhesive film-shaped
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2310/00Treatment by energy or chemical effects
    • B32B2310/021Treatment by energy or chemical effects using electrical effects
    • B32B2310/025Electrostatic charges

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Non-Metallic Protective Coatings For Printed Circuits (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for evenly pasting a film to the surface of a base without generating a stepped part from the tip part to the rear end part of the film and further, without generating creases and bubbles, and a device using this method. <P>SOLUTION: In this method, the tip part of the film is retained by an electrostatic force working between the tip part and the outer peripheral surface of a pressing roller by applying an electric charge to the tip part of the film; the tip part of the film is made to coincide with a position for starting its pasting to the base by conveying the film to the base by the rotation of the pressing roller and the film is pasted to the surface of the base; the rear end part of the film is also retained by an electrostatic force working between the rear end part and the outer peripheral surface of the pressing roller by applying an electric charge to the rear end part; the entire film is pasted from tip to rear end to the base by the rotation of the roller; and the rotating pressing roller is destaticized at an upstream position of the roller retaining the tip part and the rear end part of the film. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明はフィルム貼付方法およびその装置に係り、特に、基板の表面に貼り付けたい形状のフィルムを圧着ロールによって基板表面へ貼り付ける方法及びその装置に関する。
【0002】
【従来の技術】
従来、フィルムロールからフィルムを繰り出し、連続したフィルムを幅方向に切断して貼り付けたい形状とした枚葉のフィルム(以下、フィルムと略記する。)とし、1対の圧着ロールによってフィルムを基板表面へ貼り付けるにあたっては、下記の特許文献1に記載のように、フィルムの先端部を真空プレートなどの先端保持部材により保持して基板に貼り付け、先端保持部材が退避した後は両圧着ロールでフィルムと基板を挟み、両圧着ロールの回転で基板を複数の搬送ロールで構成している搬送路面上を搬送しつつ基板へのフィルムの貼り合せを行い、貼り付け終了の頃にフィルムの後端部をフィルム吸引部材(バキュームバー)などの終端保持部材で保持し直してフィルムの後端部までを基板上に貼り付けるようにしている。
【0003】
【特許文献1】
特公平3−16906号公報
【0004】
【発明が解決しようとする課題】
上記従来技術によれば、フィルムの先端部や後端部を基板に貼り付ける場合とフィルムの先端部と後端部の間の中間部を基板に貼り付ける場合とでは貼り付ける部材が相違するために加圧力に差を生じやすく、そのために貼り付けたフィルムの先端部や後端部に段差があって、その後の基板への処理に支障を来たしていた。例えば、フィルムがレジストフィルムであれば、露光を行うと段差で光量が変化し、筋が発生する問題などがあった。
【0005】
また、フィルム後端部の保持部材は基板と圧着ロール間の空間に入れず、貼り付け終了位置以前にフィルム後端部の保持を停止して自由解放するために、フィルム後端部の貼り付けは乱れ、しわや気泡が発生しがちであった。
【0006】
それゆえ本発明の目的は、フィルムの先端部から後端部まで段差を発生することなく平坦に基板上に貼り付けることができるフィルム貼付方法及びその装置を提供することにある。
【0007】
また、本発明の他の目的はしわや気泡を発生することなくフィルムの先端部から後端部まで基板上に貼り付けることができるフィルム貼付方法及びその装置を提供することにある。
【0008】
【課題を解決するための手段】
上記目的を達成する本発明方法の特徴とするところは、基板の表面に貼り付けたい形状のフィルムを圧着ロールによって基板の表面に貼り付けるフィルム貼付方法において、貼り付けたい形状のフィルムの先端部に電荷を付与して該先端部を該圧着ロールの外周面に両者の間に働く静電力で保持せしめ、該圧着ロールの回転により該貼り付けたい形状のフィルムを基板に搬送して該先端部を基板の貼り付け開始位置に一致せしめるとともに該貼り付けたい形状のフィルムを基板の表面に貼り付けて行き、該貼り付けたい形状のフィルムの後端部も電荷を付与して該後端部を該圧着ロールの外周面に両者の間に働く静電力で保持せしめ、該先端部から該後端部までの該貼り付けたい形状のフィルム全てを該圧着ロールの回転により基板に貼り付け、回転する該圧着ロールは該先端部を該圧着ロールの外周面で保持する該圧着ロールの上流位置において除電していることにある。
【0009】
また上記目的を達成する本発明装置の特徴とするところは、基板の表面に貼り付けたい形状としたフィルムを圧着ロールによって基板の表面に貼り付けるフィルム貼付装置において、該貼り付けたい形状としたフィルムを静電力で保持する機能を有する圧着ロールと、該貼り付けたい形状としたフィルムの先端部を保持して該先端部を該圧着ロールの外周面に受け渡すフィルム先端保持部材と、該貼り付けたい形状としたフィルムの後端部を保持して該後端部を該圧着ロールの外周面に受け渡すフィルム後端保持部材と、該貼り付けたい形状としたフィルムの先端部および後端部に電荷を付与する手段と、該圧着ロールが回転しているときに該先端部そして後端部を該圧着ロールの外周面で保持する該圧着ロールの上流位置で該圧着ロールを除電する手段とを有し、該圧着ロールは除電してあるその外周面で該先端部を静電力で保持し、該圧着ロールの回転により該貼り付けたい形状としたフィルムを基板に搬送して該先端部を基板の貼り付け開始位置に一致せしめるとともに該貼り付けたい形状としたフィルムを基板の表面に貼り付けて行き、該後端部も除電してある該圧着ロールの外周面で静電力により保持して該圧着ロールの回転により該先端部から該後端部までの該貼り付けたい形状としたフィルム全てを基板に貼り付けることにある。
【0010】
本発明によれば、貼り付けたい形状のフィルムを基板に貼り付けるものは圧着ロールだけで圧着部材を切り替えていないので、段差を発生することなく平坦に基板上に貼り付けることができる。
【0011】
さらに圧着ロールは除電しているので、フィルムに電荷を付与してもフィルムに付与する電荷と同種の電荷で圧着ロールが帯電していくことはなく、従って圧着ロールとフィルムの間に静電的な斥力が発生することはなく、フィルム先端部から後端部まで圧着ロールで該貼り付けたい形状のフィルム全てを保持して基板に貼り付けることができて、しわや気泡を発生しない。
【0012】
【発明の実施の形態】
図1は、本発明の一実施形態になるフィルム貼付装置の概略断面図である。 図1において、1はカバーフィルム2a,レジストフィルム2bとベースフィルム2cの3層構成となっているフィルム2Aのフィルムロールであり、フィルム2Aはフィルムロール1に内側からカバーフィルム2a,レジストフィルム2b,ベースフィルム2cの順番で巻き込んである。3はフィルム2Aからセパレーターバー4で剥離するカバーフィルム2aを回収する巻き取りロールである。フィルムロール1及び巻き取りロール3の駆動装置(例えば、モータ)にはフィルムロール1におけるフィルム2Aの残量に応じてモータのトルク調整を行える機能を設けてあり、フィルム2Aの張力を一定にして搬送するようにしている。5は段差ロールで、段差ロール5はカバーフィルム2a剥離後のレジストフィルム2bとベースフィルム2cとで2層構成となったフィルム2Bの張力(バックテンション)の調整を行える位置調整機能を設けてあり、フィルム2Bの張力調整は後述する。
【0013】
6は、フィルム2Bの先端保持部材7,先端保持部材7を上下移動させるエアシリンダ8,フィルム2Bの後端保持部材9,先端保持部材7の上下移動時に後端保持部材9を左右に移動させるエアシリンダ10を有するフィルム搬送部材で、フィルム搬送部材6はサーボモータ11と直結されたボールねじ12の回転で上下移動するようになっている。
【0014】
図2に示すように、先端保持部材7の内部には幾つかに別れた真空室、上面(図1で左側の面)には吸着孔があり、その真空室を中間バルブを介して真空ポンプに連通してあるので上面でフィルム2Bの先端を吸着する。また、真空状態を監視する圧力センサを設け、何らかの原因によりフィルム2Bの吸着位置がずれ、吸着孔の上面にフィルムが位置しない場合は、真空圧が低下することからフィルムの吸着状況を監視することができるようにしてある。
【0015】
後端保持部材9も先端保持部材7と同じように内部に真空室、上面(図1で左側の面)に吸着孔があり、真空状態を監視する圧力センサを設け、何らかの原因によりフィルム2Bの吸着位置がずれ、吸着孔がある上面(図1で左側の面)にフィルム2Bが位置しない場合は、真空圧が低下しフィルム2Bの吸着状態を監視することができる。吸着孔は、フィルム搬送方向に対して直交するように配置されており、吸着孔の大きさは、後述する圧着ロール14側から段差ロール5の方向に対して徐々に小さくなり、フィルム2Bの後端が後端保持部材9の上面を滑って搬送される時は、真空が徐々に切れていくことによりフィルム2Bの後端まで吸着保持することが可能なようにしてある。また、フィルム2Bの搬送方向に直交する幅方向(図1の紙面に垂直な方向)に溝を設けており、カッタ13(図1参照)でフィルム2Bを幅方向に切断するときのカッタ受けとして用いる。また、カッタ13は、フィルム2Bの搬送方向に対し垂直な方向(図1の右左方向)に移動可能となるようにフィルム搬送部材6にエアシリンダ(図示は省略する)を介して取り付けてあり、フィルム2Bの切断をしない時は、図1中の左側に退避できるようになっている。フィルム2Bの切断速度は、フィルム搬送部材6がフィルム保持位置となるフィルム2Bの切断位置からフィルム先端受渡し位置までの移動時間中に完了するように、カッタ13の移動速度を調整することが可能となるようにしてある。
【0016】
後端保持部材9の上面(図1で左側の面)6は図1において圧着ロール14の左側の外周面部分に対する接触平面となり、先端保持部材7の上下移動時に干渉しないようにエアシリンダ10で図1において左右方向に移動する。また、先端保持部材7においてもエアシリンダ8で上下方向の駆動が可能であり、後述する開いた状態にある圧着ロール14との接触位置調整が可能となるようにストッパ部材を設けてある。
【0017】
このように、フィルム搬送部材6は、フィルムロール1から段差ロール5を経て供給されるフィルム2Bを、圧着ロール14の外周に対する接平面と平行してサーボモータ11により圧着ロール14付近まで正確に搬送し(図1の上方向から下方向)、搬送中にカッタ13でフィルム2Bを幅方向に切断する。
【0018】
対をなす各圧着ロール14は、複数の搬送ローラ15で構成する搬送路の上下にあり、搬送ローラ15が図の左から右に向けて搬送する基板PBを上下方向から挟むように移動可能に配置してある。各圧着ロール14の上下方向移動(開閉)は、図示を省略したエアシリンダで行う。図示していないが、搬送中の基板PBの先端を検出するセンサを圧着ロール14より入口側(図1の左側)の搬送ローラ15間に設置する。搬送ローラ15は、搬送中の基板PBの先端を検出した位置から圧着ロール14下の任意の位置へ搬送・停止することが可能である。
【0019】
圧着ロール14は、ロール本体とその外周表面にコーティングしたシリコンゴムからなる。ロール本体の内部にはヒータがある。圧着ロール14はフィルム2Bを基板PBの上面に貼り付けるが、その貼付処理は後述する。
【0020】
圧着ロール14の左方に電極16を設置してあり、静電気発生装置17と接続している。静電気発生装置17から電極16に高電圧を印加した場合、電極16の右側に搬送されてくるフィルム2Bは電荷を付与されて帯電し、フィルム2Bの先端部は静電(クーロン)力で右側の圧着ロール14の表面に密着する。右側の圧着ロール14と電極16を囲むように、防塵カバー18を設けているため、電極で帯電されたフィルム2Bにゴミ等が付着することはない。
【0021】
防塵カバー18の内部における圧着ロール14の右側に、除電装置19を配置してある。電極16からフィルム2Bに電荷(例えば、負電荷)を付与し圧着ロール14で搬送路上の複数の基板PBへフィルム2Bを順次貼り付けることを繰り返すと、圧着ロール14におけるシリコンゴム表面には、電極16からフィルム2Bに付与する電荷と同極性の高い電圧が帯電してくる。そうするとフィルム2Bの先端や後端に付与した電荷と圧着ロール14におけるシリコンゴム表面に溜まった電荷の間に斥力が働き、圧着ロール14(のシリコンゴム)表面にフィルム2Bの先端や後端を密着することができなくなる。
【0022】
そこで、除電装置19として、急激に圧着ロール14の帯電圧を下げるための自己放電型除電ブラシを設置している。また、自己放電型除電ブラシにイオナイザーを併用してもよく、イオナイザーのみを設置してもよい。これらのイオナイザーは、フィルム2Bの先端や後端に付与する電荷とは逆極性(即ち、圧着ロール14におけるシリコンゴム表面に溜まった電荷とは逆極性)の電荷を出すもので、低い帯電圧に対しても有効に除電を行うことが可能となる。イオナイザー使用時には、イオンを放出する際にエアーブロアを取り付けることにより広い範囲を除電することができ、貼付け後の基板表面も同時に除電することが可能となる。除電装置19は、圧着ロール14の回転方向に関してフィルム2Bの先端部および後端部を保持する圧着ロール14における外周面の上流位置に設けることにより、常に同じ圧着ロール表面状態を保ちフィルム2Bを安定して静電吸着することができる。
【0023】
20はフィルム保持バーで、切断されたフィルム2Bの後端部を吸引吸着により保持し圧着ロール14の左方の電極16によりフィルム2Bが圧着ロール14の外周面に密着するまでフィルム後端を保持する。フィルム保持バー20は圧着ロール14の外周に接近して配置され、圧着ロール14の接平面(フィルム2Bが圧着ロール14の接線方向になる面)と平行した形状でよく、圧着ロール外周と基板搬送面との接点から基板搬送方向の上流側近傍における空間とほぼ相似形状である必要はない。また、先端保持部材7との干渉を避けるためフィルム2Bの先端受渡し時には、圧着ロール14の上側に退避するようにしてある。
【0024】
23はフィルム貼付装置をコントロールする制御装置で、フィルム2Bの貼付け長さ等データや装置を駆動させるためのモータ定数等を記憶するメモリ(RAM)さらにはフィルム貼付に関するソフトプログラムを記憶するメモリ(ROM)を内蔵し、フィルム2Bの貼付け長さ等のデータ、装置を駆動させるためのモータ定数等を表示するモニタ画面24、制御装置23のメモリ(RAM)データを入力するためのキーボード25が付属している。
【0025】
また、フィルム貼付に関するソフトプログラムは、本装置の動作ステップを実行するためのプログラム,モニタ画面24にデータを設定するための操作画面プログラムなどである。
【0026】
次に、フィルム貼付装置の動作を図3に示したフローに従って説明する。
動作開始時には、ステップ(以下、「S」と略記する)100に示すフィルム貼付動作準備を行う。
【0027】
フィルム貼付動作準備S100として、手動でフィルムロール1からフィルム2Aを引き出してセパレータバー4,段差ロール5に渡し、カバーフィルム2aを剥離する。剥離したカバーフィルム2aは巻き取りロール3で巻き取る。カバーフィルム2aを剥離し2層となったフィルム2Bは図1のように先端保持部材7と上面位置が並んでいる後端保持部材9の先端まで引き出し、先端保持部材7及び後端保持部材9の上面で真空吸着する。段差ロール5は図1に図示した上側の位置に移動させ、フィルムロール1及び巻き取りロール3は図示していないモータを回転させ、フィルム2Aの張力が一定になるようにしている。
【0028】
後端保持部材9の溝部分にカッタ8が通過するようにしつつカッタ8をフィルム2Bの幅方向に移動させて、フィルム2Bを幅方向に切断する。フィルム2Bを吸着していた後端保持部材9の真空吸着を停止させて、後端保持部材9上におけるフィルム2Bの切れ端は廃棄する。
【0029】
このとき、先端保持部材7上には、フィルム2Bが先端保持部材7の先端から後端保持部材9上に10mm程度はみ出した状態で真空吸着されている。
【0030】
これでフィルム貼付動作準備S100が完了し、次に、フィルム受渡し処理S200に進む。
【0031】
フィルム受渡し処理S200では、フィルム搬送部材6に設けてシリンダ10で駆動し後端保持部材9を図2に示すように右側に退避させる。また、フィルム保持バー20も圧着ロール14の上側に退避させる。その後、サーボモータ11でボールねじ12を回転させて、フィルム搬送部材6を圧着ロール14の外周に対する接平面と平行に移動(図1の下方向に移動)させる。この時、1対の圧着ロール14は開いており、内部のヒータで加熱された状態となっている。そして、フィルム2Bの先端が上側の圧着ロール14の接点位置(フィルム2Bが圧着ロール14の接線方向になる場合におけるフィルム2Bの先端位置)となるように、エアシリンダ8で先端保持部材7を移動させる。ここで、静電気発生装置17から電極16に高電圧を印加して、電極16と圧着ロール14の間にあり先端保持部材7からはみ出している10mm程度のフィルム2Bの先端部分が帯電される。フィルム2Bの先端部分は接地されている圧着ロール14に静電吸着されたら、静電気発生装置17から電極16への高電圧印加を停止し、先端保持部材7の真空吸引を止めてフィルム2Bの吸着保持を開放する。この場合、フィルム2Bの先端を圧着ロール14の接平面(フィルム2Bが圧着ロール14の接線方向になる面)と平行に搬送することにより、皺無く均一な静電吸着力で圧着ロール14へ受け渡すことができる。
【0032】
フィルム2Bの受け渡し後、圧着ロール14は搬送ローラ15で構成している基板PBの搬送路方向に回転を開始し、吸着したフィルム2Bを下側に搬送する。搬送開始と同時にフィルムロール1及び巻き取りロール3の駆動装置のモータトルク力を弱め、また、段差ロール5を下側に移動させる。フィルム搬送速度と同期して段差ロール5を移動させることによりフィルム2Bのバックテンション(張力)を弱め、圧着ロール14によるフィルム2Bの搬送を補助する。
【0033】
一般に、圧着ロール14によるフィルム2Bの静電吸着力は帯電圧に比例し、帯電圧は圧着ロール14とフィルム2Bの吸着面積に比例する。圧着ロール14はフィルム2Bの先端部を吸着しているだけで弱い帯電圧、すなわち弱い静電吸着力になっており、圧着ロール14へのフィルム受渡し直後はフィルム搬送が不安定な状態であり、フィルム2Bのバックテンションを弱め圧着ロール14の回転による基板PB側へのフィルム2Bの搬送をしやすいようにする。
【0034】
逆に圧着ロール14によるフィルム巻き角度が大きくなり、圧着ロール14とフィルム2Bの吸着面積が増大するにつれ、静電吸着力が強くなりフィルム2Bの保持は安定する。段差ロール5は、フィルム2Bのバックテンションを弱めることが可能なフィルムテンション調整手段であり、アクチュエータなど(図示は省略する)により上下移動が可能である。フィルム2Bを基板表面へ貼り付ける時は上側に段差ロール3が位置し、圧着ロール14でフィルム2Bを圧着ロール14の下まで搬送する時は、段差ロール5を下側に移動させる。この時、フィルム2Bの搬送速度と同期して段差ロール5を移動させることによりフィルム2Bのバックテンションを弱め、圧着ロール14によるフィルム2Bの搬送を補助することが出来る。
【0035】
また、段差ロール5に代えて移動することが出来ない固定のガイドロールを用いた時は、フィルムロール1及び巻き取りロール4をその駆動装置(例えば、モータ)により、巻出し方向に回転させてフィルム2Bのバックテンションを弱め、圧着ロール14によるフィルム2Bの搬送を補助してもよい。
【0036】
圧着ロール14の回転でフィルム2Bの先端が上側の圧着ロール14における下面中央に至ったかどうかを圧着ロール14の主軸に具備してあるエンコーダ(図示は省略)からのパルス数で確認しており、確認できたところで圧着ロール14は回転を停止する。
【0037】
また、上側の圧着ロール14によるフィルム2Bの搬送開始直前に先端保持部材7によるフィルム2Bの吸着は止め、上側の圧着ロール14によるフィルム2Bの搬送中に先端保持部材7をエアシリンダ8で上方向に戻したのちに、後端保持部材9を左側に移動させ初期状態に戻し、退避していた後端保持部材9は、先端保持部材7と並ぶようにしてフィルム2Bの搬送位置に戻す。その後、フィルム2Bの切断位置へサーボモータ11によりフィルム搬送部材6を移動させる。
【0038】
フィルム受渡し処理S200中に基板位置決め処理S300を同時に行う。
【0039】
基板位置決め処理S300であるが、基板PBは搬送ロール15で図1の左から右方向に移動して来る。この場合、図示していないセンサで移動量を検知していて、基板PBにおける先端部のフィルム貼付開始位置が上側圧着ロール14における下面中央に位置したフィルム2Bの先端と一致したところで、基板PBの移動を一旦停止するようになっている。その後、フィルム貼付け処理S400を行う。
【0040】
フィルム貼付け処理S400では、上下の圧着ロール14が基板PBの方向に上下動して、両圧着ロール14で基板PBを挟持(ニップ)し、基板PBへフィルム2Bの先端を熱圧着する。また、段差ロール5を初期状態(図1の上側)に戻し、段差ロール5から圧着ロール14までの間でフィルム2Bのたるみを防止する。この時、一旦、フィルムロール1のバックテンションを強め、フィルム2Bのたるみを防止してもよい。次にフィルム保持バー20を圧着ロール14へのフィルム後端受渡し位置となる電極16と圧着ロール14の間まで移動し、移動完了後、フィルム保持バー20の左側に位置するフィルム2Bをフィルム保持バー20で弱く真空吸着する。その後、両圧着ロール14は基板14を挟持(ニップ)したまま回転して、基板14を右方向に搬送し、フィルム保持バー20ではフィルム2Bを滑らしつつ圧着ロール14上のフィルム2Bを基板14に熱圧着していく。フィルム保持バー20はフィルム2Bが滑りやすいように、表面をPTFE(ポリテトラフルオロエチレン)で表面処理をしたものやエンジニアリングプラスチック(MCナイロン)で成形したものを用いると良い。
【0041】
また、フィルム貼付け処理S400のフィルム搬送部材6が圧着ロール14側に移動中にフィルムカット処理S500を行う。
【0042】
フィルムカット処理S500では、フィルム搬送部材6は、フィルム2Bの後端となる位置が後端保持部材9のカット溝上を通過する手前から徐々に圧着ロール14方向に移動開始し、圧着ロール14の回転速度に同期する。フィルム熱圧着(貼り付け)中に予め設定したフィルム貼付け量の後端となるフィルム箇所が、後端保持部材9のカット溝上を通過する際に先端保持部材7,後端保持部材9によりフィルム2Bを吸着保持する。フィルム2Bの後端となる位置がカット溝上を通過したか否かの判断は、フィルムロール1や圧着ロール14の主軸などに具備させてあるエンコーダからのパルス数で確認している。フィルムカットは、フィルム搬送部材6がフィルム先端受渡し位置までの移動時間中にカッタ13を幅方向に移動させてフィルム2Bを切断する。フィルム2B(2A)の幅は基板PBに貼り付けたい幅と一致させてあり、カッタ13による切断で基板PBに貼り付けたい長さに一致され、基板の表面に貼り付けたい形状となる。
【0043】
フィルム2Bの切断後、後端保持部材9はフィルム2Bの後端部を吸着保持したまま右側に移動させ退避するが、フィルム2Bは圧着ロール14で基板PB側に搬送されているので、後端保持部材9の上面を滑りつつ離れ、フィルム保持バー20のみにより弱く真空吸着保持される。
【0044】
フィルム2Bの後端がフィルム保持バー20上を滑って離れる手前から、静電気発生装置17より電極16に再び高電圧を印加し、フィルム保持バー20上のフィルム2Bの後端に電荷を付与し、フィルム2Bの後端がフィルム保持バー20上から離れて圧着ロール14へ移った個所から順次圧着ロール14へ静電吸着させる。フィルム2Bの後端が電極16を過ぎた時点で、静電気発生装置17から電極16への高電圧印加を停止し、フィルム保持バー20は圧着ロール14の上側に退避させる。これにより、フィルム2Bの後端を最後まで保持し圧着ロール14へ受け渡すことが可能であり、フィルム2Bの後端が基板PB上に垂れ下がることは無く、フィルム2Bの先端から後端までを一定の引張力を付与しつつ基板PBに貼り付けることができる。
【0045】
基板PBの表面に貼り付けたい形状のフィルムを熱圧着した基板14は、搬送ローラ15が回転し、下流機へ搬送される。
【0046】
そして、終わりかどうかの判断処理S600で次に新たな基板PBが搬入されたかどうかを判断し、次の基板PBがあれば、フィルム受渡し処理S200に戻って、以上説明した処理動作を繰り返す。
【0047】
以上説明したように、貼り付けたい形状のフィルムの先端から後端までの全てを圧着ロール14によって基板PBの表面に貼り付けるので、貼り付けたフィルムに段差などはなく、平坦な仕上がりとなっている。また、圧着ロール14はフィルムの先端部や後端部を確実に吸着しているので、基板PBに貼り付けたフィルムの先端部や後端部にしわや気泡が発生することもない。
【0048】
フィルム貼付装置は、圧着ロール14の回転中に電極16に対して上流側に位置する除電装置19により圧着ロール14のシリコンゴム表面を除電しており、圧着ロール14は電位的に同じ表面状態を保ち、フィルム2Bの先端と後端を静電吸着することが出来る。また、同時に除電装置19によりフィルムが貼り付けられた基板PBの表面を除電しておけば、後で除電処理をしなくてもよい。除電装置19は、フィルム保持バー20が圧着ロール14の上側に位置する時にフィルム保持バー20も除電すると良い。
【0049】
連続して基板PBが搬送されずに、基板待ち状態が生じた時は、圧着ロール14を回転させ、常にシリコンゴム表面を除電していてもよい。
【0050】
以上説明した実施形態においては、基板PBの上面にフィルムを貼り付けるための機構と方法を説明したが、基板PBの下面にもフィルムを貼り付け対場合は、図4に示すように上面貼付けの機構と同様な機構を搬送路の下側に配置することにより、基板下面への貼付けが可能となる。
【0051】
なお、図4において、図1に示したものと同一機能・同様な機能を持つものは同一引用符号で示している。
【0052】
図1や図4における実施形態において、フィルム保持バー20は省略し、フィルム2Bにおける後端の圧着ロール14への受け渡しを圧着ロール14近傍に接近させた後端保持部材9で行うようにしても良い。この場合、後端保持部材9は防塵カバー18の外に位置し、電極16からの電荷付与の影響を殆ど受けないので、除電をしなくても構わない。
【0053】
また、図1や図4における実施形態において、圧着ロール14の表面電位を検出するセンサを圧着ロール14に設け、所望の電位以上になったら除電装置19が作動するようにして、省電力化を図っても良い。
【0054】
【発明の効果】
以上説明したように本発明によれば、フィルムの先端部から後端部まで段差を発生することなく平坦に基板上に貼り付けることができる。
また、本発明によれば、しわや気泡を発生することなくフィルムの先端部から後端部まで基板上に貼り付けることができる。
【図面の簡単な説明】
【図1】本発明の一実施形態であるフィルム貼付装置を示す概略断面図である。
【図2】図1のフィルム後端保持部、先端保持部を説明する図である。
【図3】図1のフィルム貼付装置における動作手順を説明するフローである。
【図4】本発明の他の一実施形態であるフィルム貼付装置を示す概略断面図である。
【符号の説明】
1…フィルムロール
2A,2B…フィルム
2a…カバーフィルム
2b…レジストフィルム
2c…ベースフィルム
3…巻き取りロール
4…セパレータバー
5…段差ロール
6…フィルム搬送部材
7…先端保持部材
8,10…エアシリンダ
9…後端保持部材
11…サーボモータ
12…ボールねじ
13…カッタ
14…圧着ロール
15…搬送ローラ
16…電極
17…静電気発生装置
18…防塵カバー
19…除電装置
20…フィルム保持バー
23…制御装置
24…モニタ
25…キーボード
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for attaching a film, and more particularly to a method and an apparatus for attaching a film having a shape to be attached to the surface of a substrate to a surface of the substrate using a pressure roll.
[0002]
[Prior art]
Conventionally, a film is unwound from a film roll, and a continuous film is cut in the width direction to form a sheet-like film (hereinafter abbreviated as a film) in a shape to be attached. When attaching to the substrate, as described in Patent Document 1 below, the leading end of the film is held by a tip holding member such as a vacuum plate and attached to a substrate, and after the tip holding member is retracted, both pressure rolls are used. The film and the substrate are sandwiched, and the film is bonded to the substrate while the substrate is transported on the transport path surface composed of a plurality of transport rolls by the rotation of both pressure rolls. The portion is held again by an end holding member such as a film suction member (vacuum bar), and the rear end of the film is stuck on the substrate.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 3-16906
[0004]
[Problems to be solved by the invention]
According to the above prior art, the members to be attached are different between the case where the leading end or the rear end of the film is attached to the substrate and the case where the intermediate portion between the leading end and the rear end of the film is attached to the substrate. In this case, the applied pressure tends to be different, so that the front and rear ends of the attached film have steps, which hinders the subsequent processing of the substrate. For example, if the film is a resist film, there is a problem that the amount of light changes due to steps when exposure is performed, and streaks occur.
[0005]
In addition, the holding member at the rear end of the film is not put in the space between the substrate and the pressure roll, and the holding of the rear end of the film is stopped before the end position of the pasting and the film is attached to the rear end of the film. Tended to be turbulent, wrinkles and air bubbles.
[0006]
Therefore, an object of the present invention is to provide a film sticking method and a film sticking method capable of sticking flatly on a substrate without generating a step from the leading end to the trailing end of the film.
[0007]
Another object of the present invention is to provide a film sticking method and a film sticking method capable of sticking the film from the leading end to the trailing end on a substrate without generating wrinkles or bubbles.
[0008]
[Means for Solving the Problems]
The feature of the method of the present invention that achieves the above object is that in a film attaching method in which a film of a shape to be attached to the surface of the substrate is attached to the surface of the substrate by a pressure roll, the film has a shape to be attached to a tip portion of the film to be attached. The tip is provided with an electrostatic force acting on the outer peripheral surface of the pressure roll between the two by applying an electric charge, and the film having the desired shape is conveyed to the substrate by rotation of the pressure roll to remove the tip. At the same time as matching the starting position of the substrate, the film of the shape to be attached is attached to the surface of the substrate. The outer peripheral surface of the pressure roll is held by an electrostatic force acting between the two, and all of the film to be bonded from the front end to the rear end is bonded to the substrate by rotating the pressure roll. , Piezoelectric deposition rolls rotating is to have neutralizing upstream position of the piezoelectric deposition roll to hold the tip portion in the outer peripheral surface of the piezoelectric deposition roll.
[0009]
A feature of the apparatus of the present invention that achieves the above object is that in a film sticking apparatus in which a film having a shape to be attached to the surface of the substrate is attached to the surface of the substrate by a pressure roll, the film having the shape to be attached is provided. Roll having the function of holding the film with electrostatic force, a film tip holding member for holding the tip of the film to be pasted and transferring the tip to the outer peripheral surface of the crimp roll, A film rear end holding member that holds the rear end of the film in a desired shape and transfers the rear end to the outer peripheral surface of the pressure roll, and a front end and a rear end of the film in a desired shape. Means for applying a charge, and the pressing roll at an upstream position of the pressing roll holding the leading end and the rear end on the outer peripheral surface of the pressing roll when the pressing roll is rotating. Means for charging, the press roll holds the tip portion with electrostatic force on the outer peripheral surface of which the charge is removed, and transports the film having the shape to be attached to the substrate by rotating the press roll. The front end is made to coincide with the position where the substrate is to be pasted, and the film having the desired shape is adhered to the surface of the substrate. And attaching all the films having the desired shape from the front end to the rear end by rotating the pressure roll.
[0010]
According to the present invention, the film to be pasted on the substrate can be adhered flat to the substrate without generating a step because the pressure member is not switched only by the pressure roll.
[0011]
Furthermore, since the pressure of the pressure roll is eliminated, even if a charge is applied to the film, the pressure of the pressure roll is not charged with the same kind of charge as the charge applied to the film. No repulsive force is generated, and the entire film having the desired shape can be held and adhered to the substrate by a pressure roll from the leading end to the trailing end of the film, and no wrinkles or bubbles are generated.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a schematic sectional view of a film sticking apparatus according to one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a film roll of a film 2A having a three-layer structure including a cover film 2a, a resist film 2b, and a base film 2c. They are wound in the order of the base film 2c. Reference numeral 3 denotes a take-up roll for collecting a cover film 2a that is peeled off from the film 2A by the separator bar 4. The drive device (for example, a motor) for the film roll 1 and the take-up roll 3 is provided with a function capable of adjusting the torque of the motor in accordance with the remaining amount of the film 2A in the film roll 1 so that the tension of the film 2A is kept constant. It is transported. Reference numeral 5 denotes a step roll. The step roll 5 is provided with a position adjusting function capable of adjusting the tension (back tension) of the film 2B having a two-layer structure of the resist film 2b and the base film 2c after the cover film 2a is peeled off. The adjustment of the tension of the film 2B will be described later.
[0013]
Reference numeral 6 denotes a front end holding member 7 of the film 2B, an air cylinder 8 for moving the front end holding member 7 up and down, a rear end holding member 9 of the film 2B, and moving the rear end holding member 9 right and left when the front end holding member 7 moves up and down. In the film transport member having an air cylinder 10, the film transport member 6 moves up and down by the rotation of a ball screw 12 directly connected to a servomotor 11.
[0014]
As shown in FIG. 2, a vacuum chamber is divided into several parts inside the tip holding member 7, and a suction hole is provided on the upper surface (the left surface in FIG. 1). The vacuum chamber is connected to a vacuum pump through an intermediate valve. , The top surface of the film 2B is sucked at the upper surface. Further, a pressure sensor for monitoring the vacuum state is provided, and when the suction position of the film 2B is shifted for some reason and the film is not located on the upper surface of the suction hole, the vacuum pressure is reduced, so that the suction state of the film is monitored. I can do it.
[0015]
Similarly to the front end holding member 7, the rear end holding member 9 has a vacuum chamber inside, a suction hole on the upper surface (the left side surface in FIG. 1), and a pressure sensor for monitoring a vacuum state is provided. When the suction position is shifted and the film 2B is not located on the upper surface (the left surface in FIG. 1) having the suction holes, the vacuum pressure is reduced and the suction state of the film 2B can be monitored. The suction holes are arranged so as to be orthogonal to the film transport direction, and the size of the suction holes gradually decreases in the direction of the step roll 5 from the side of the pressure roll 14, which will be described later. When the edge slides on the upper surface of the rear end holding member 9 and is conveyed, the vacuum is gradually cut so that the film 2B can be suction-held to the rear end. Further, grooves are provided in the width direction perpendicular to the transport direction of the film 2B (the direction perpendicular to the paper surface of FIG. 1), and are used as cutter holders when the film 2B is cut in the width direction by the cutter 13 (see FIG. 1). Used. The cutter 13 is attached to the film transport member 6 via an air cylinder (not shown) so as to be movable in a direction perpendicular to the transport direction of the film 2B (right and left directions in FIG. 1). When the film 2B is not cut, it can be retracted to the left side in FIG. It is possible to adjust the moving speed of the cutter 13 so that the cutting speed of the film 2B is completed during the moving time from the cutting position of the film 2B, which is the film holding position, to the film leading end transfer position. It has become.
[0016]
The upper surface (left surface in FIG. 1) 6 of the rear end holding member 9 is a contact plane with the left outer peripheral surface of the pressure roll 14 in FIG. In FIG. 1, it moves in the left-right direction. Also, the tip holding member 7 can be driven in the vertical direction by the air cylinder 8, and a stopper member is provided so that the contact position with the pressure roller 14 in an open state described later can be adjusted.
[0017]
As described above, the film transport member 6 accurately transports the film 2B supplied from the film roll 1 via the step roll 5 to the vicinity of the pressure roll 14 by the servo motor 11 in parallel with the tangent plane to the outer circumference of the pressure roll 14. Then, the film 2B is cut in the width direction by the cutter 13 during conveyance (from the upper direction to the lower direction in FIG. 1).
[0018]
Each pair of pressure rolls 14 is located above and below a transport path composed of a plurality of transport rollers 15 so that the transport rollers 15 can move so as to sandwich the substrate PB transported from left to right in the figure from above and below. It is arranged. The vertical movement (opening / closing) of each pressure roll 14 is performed by an air cylinder not shown. Although not shown, a sensor for detecting the leading end of the substrate PB being transported is installed between the transport rollers 15 on the entrance side (left side in FIG. 1) of the pressure roll 14. The transport roller 15 can transport and stop from a position where the leading end of the substrate PB being transported is detected to an arbitrary position below the pressure roll 14.
[0019]
The pressure roll 14 is composed of a roll body and silicon rubber coated on the outer peripheral surface thereof. There is a heater inside the roll body. The pressure roll 14 sticks the film 2B to the upper surface of the substrate PB, and the sticking process will be described later.
[0020]
An electrode 16 is provided on the left side of the pressure roll 14 and is connected to a static electricity generator 17. When a high voltage is applied to the electrode 16 from the static electricity generator 17, the film 2 </ b> B conveyed to the right side of the electrode 16 is charged and charged, and the leading end of the film 2 </ b> B is charged by electrostatic (Coulomb) force. It is in close contact with the surface of the pressure roll 14. Since the dustproof cover 18 is provided so as to surround the right-hand pressure roll 14 and the electrode 16, dust and the like do not adhere to the film 2B charged by the electrode.
[0021]
On the right side of the pressure roll 14 inside the dustproof cover 18, a static eliminator 19 is arranged. When a charge (for example, a negative charge) is applied to the film 2B from the electrode 16 and the film 2B is sequentially attached to the plurality of substrates PB on the transport path by the pressure roll 14, the silicon rubber surface of the pressure roll 14 has an electrode. From 16, a high voltage having the same polarity as the charge applied to the film 2 </ b> B is charged. Then, a repulsive force acts between the charge applied to the leading end or the trailing end of the film 2B and the charge accumulated on the surface of the silicone rubber in the pressing roll 14, and the leading end or the trailing end of the film 2B adheres to the surface of the pressing roll 14 (silicon rubber). You can't do that.
[0022]
Therefore, a self-discharge type static elimination brush for rapidly lowering the charged voltage of the pressure bonding roll 14 is installed as the static eliminator 19. Further, an ionizer may be used in combination with the self-discharge type static elimination brush, or only the ionizer may be provided. These ionizers generate charges of the opposite polarity to the charges applied to the leading and trailing ends of the film 2B (that is, the charges of the opposite polarity to the charges accumulated on the surface of the silicon rubber in the pressure roll 14). Also, it is possible to effectively perform static elimination. When an ionizer is used, a wide range can be neutralized by attaching an air blower when releasing ions, and the substrate surface after the application can be simultaneously neutralized. The static eliminator 19 is provided at the upstream position of the outer peripheral surface of the pressure roll 14 that holds the leading end and the rear end of the film 2B with respect to the rotation direction of the pressure roll 14, so that the same pressure roll surface state is always maintained and the film 2B is stabilized. To perform electrostatic attraction.
[0023]
Reference numeral 20 denotes a film holding bar, which holds the rear end of the cut film 2B by suction suction and holds the rear end of the film 2B by the electrode 16 on the left side of the pressure roll 14 until the film 2B comes into close contact with the outer peripheral surface of the pressure roll 14. I do. The film holding bar 20 is disposed close to the outer circumference of the pressure roll 14 and may have a shape parallel to the tangent plane of the pressure roll 14 (the surface where the film 2B is in the tangential direction of the pressure roll 14). It is not necessary that the shape be substantially similar to the space near the upstream side in the substrate transfer direction from the contact point with the surface. Further, in order to avoid interference with the leading end holding member 7, when the leading end of the film 2B is delivered, the film 2B is retracted above the pressure roll 14.
[0024]
Reference numeral 23 denotes a control device for controlling the film sticking device, a memory (RAM) for storing data such as the sticking length of the film 2B, a motor constant for driving the device, and a memory (ROM) for storing a software program related to the film sticking. ), A monitor screen 24 for displaying data such as the length of the film 2B to be attached, a motor constant for driving the apparatus, and a keyboard 25 for inputting memory (RAM) data of the controller 23. ing.
[0025]
The software programs related to film sticking include a program for executing the operation steps of the present apparatus, an operation screen program for setting data on the monitor screen 24, and the like.
[0026]
Next, the operation of the film sticking apparatus will be described according to the flow shown in FIG.
At the start of the operation, preparation for a film sticking operation shown in step (hereinafter abbreviated as “S”) 100 is performed.
[0027]
As a film sticking operation preparation S100, the film 2A is manually pulled out from the film roll 1 and passed to the separator bar 4 and the step roll 5, and the cover film 2a is peeled off. The peeled cover film 2 a is wound up by the winding roll 3. The two-layer film 2B obtained by peeling the cover film 2a is pulled out to the front end of the rear end holding member 9 whose upper surface position is aligned with the front end holding member 7 as shown in FIG. Vacuum suction on the upper surface of. The step roll 5 is moved to the upper position shown in FIG. 1, and the film roll 1 and the take-up roll 3 rotate a motor (not shown) so that the tension of the film 2A becomes constant.
[0028]
The cutter 8 is moved in the width direction of the film 2B while allowing the cutter 8 to pass through the groove portion of the rear end holding member 9, and the film 2B is cut in the width direction. The vacuum suction of the rear end holding member 9 that has held the film 2B is stopped, and the cut end of the film 2B on the rear end holding member 9 is discarded.
[0029]
At this time, the film 2 </ b> B is vacuum-adsorbed on the front end holding member 7 so as to protrude from the front end of the front end holding member 7 onto the rear end holding member 9 by about 10 mm.
[0030]
This completes the film sticking operation preparation S100, and then proceeds to film delivery processing S200.
[0031]
In the film transfer processing S200, the rear end holding member 9 is provided on the film transport member 6 and driven by the cylinder 10 to retract to the right as shown in FIG. Also, the film holding bar 20 is retracted above the pressure roll 14. Thereafter, the ball screw 12 is rotated by the servomotor 11 to move the film transport member 6 parallel to the tangent plane to the outer periphery of the pressure roll 14 (downward in FIG. 1). At this time, the pair of pressure bonding rolls 14 is open and is in a state of being heated by the internal heater. Then, the tip holding member 7 is moved by the air cylinder 8 so that the tip of the film 2B is at the contact position of the upper pressure roll 14 (the tip position of the film 2B when the film 2B is tangential to the pressure roll 14). Let it. Here, a high voltage is applied from the static electricity generator 17 to the electrode 16, and the tip of the film 2 </ b> B, which is between the electrode 16 and the pressure roll 14 and protrudes from the tip holding member 7, is charged by about 10 mm. When the leading end portion of the film 2B is electrostatically attracted to the grounded pressure roll 14, the application of the high voltage from the static electricity generator 17 to the electrode 16 is stopped, and the vacuum suction of the leading end holding member 7 is stopped to attract the film 2B. Release the hold. In this case, the tip of the film 2B is conveyed in parallel with the tangential plane of the pressure roll 14 (the surface where the film 2B is in the tangential direction of the pressure roll 14), so that the film 2B is received on the pressure roll 14 with uniform electrostatic attraction without wrinkles. You can pass.
[0032]
After the delivery of the film 2B, the pressure roll 14 starts rotating in the direction of the transport path of the substrate PB constituted by the transport roller 15, and transports the sucked film 2B downward. Simultaneously with the start of the conveyance, the motor torque of the driving device for the film roll 1 and the winding roll 3 is reduced, and the step roll 5 is moved downward. By moving the step roll 5 in synchronization with the film transport speed, the back tension (tension) of the film 2B is reduced, and the transport of the film 2B by the pressure roller 14 is assisted.
[0033]
Generally, the electrostatic attraction force of the film 2B by the pressure roll 14 is proportional to the charged voltage, and the charged voltage is proportional to the suction area between the pressure roll 14 and the film 2B. The crimping roll 14 has a weak charged voltage, that is, a weak electrostatic attraction force only by adsorbing the front end portion of the film 2B, and the film conveyance is unstable immediately after the film is transferred to the crimping roll 14, The back tension of the film 2B is reduced so that the film 2B can be easily transported to the substrate PB side by the rotation of the pressure bonding roll 14.
[0034]
Conversely, as the film winding angle of the pressure roll 14 increases and the suction area between the pressure roll 14 and the film 2B increases, the electrostatic attraction force increases and the holding of the film 2B is stabilized. The step roll 5 is a film tension adjusting means capable of weakening the back tension of the film 2B, and can be moved up and down by an actuator or the like (not shown). When the film 2B is attached to the substrate surface, the step roll 3 is positioned on the upper side. When the film 2B is transported below the pressure roll 14 by the pressure roll 14, the step roll 5 is moved downward. At this time, by moving the step roll 5 in synchronization with the transport speed of the film 2B, the back tension of the film 2B can be reduced, and the transport of the film 2B by the pressure roll 14 can be assisted.
[0035]
When a fixed guide roll that cannot move is used instead of the step roll 5, the film roll 1 and the take-up roll 4 are rotated in the unwinding direction by a driving device (for example, a motor). The back tension of the film 2B may be weakened to assist the conveyance of the film 2B by the pressure roll 14.
[0036]
Whether the leading end of the film 2B has reached the center of the lower surface of the upper pressure roll 14 by the rotation of the pressure roller 14 is confirmed by the number of pulses from an encoder (not shown) provided on the main shaft of the pressure roller 14; When it is confirmed that the pressure roller 14 stops rotating.
[0037]
In addition, the suction of the film 2B by the leading end holding member 7 is stopped immediately before the conveyance of the film 2B by the upper pressing roll 14 is started, and the leading end holding member 7 is moved upward by the air cylinder 8 during the transfer of the film 2B by the upper pressing roll 14. Then, the rear end holding member 9 is moved leftward to return to the initial state, and the retracted rear end holding member 9 is returned to the transport position of the film 2B so as to be aligned with the front end holding member 7. Thereafter, the film transport member 6 is moved by the servo motor 11 to the cutting position of the film 2B.
[0038]
The substrate positioning process S300 is performed simultaneously during the film delivery process S200.
[0039]
In the substrate positioning process S300, the substrate PB is moved from left to right in FIG. In this case, the amount of movement is detected by a sensor (not shown), and when the film sticking start position of the leading end of the substrate PB coincides with the leading end of the film 2B located at the center of the lower surface of the upper pressure roll 14, the substrate PB The movement is temporarily stopped. Thereafter, a film sticking process S400 is performed.
[0040]
In the film sticking process S400, the upper and lower pressure rolls 14 move up and down in the direction of the substrate PB, and the substrate PB is sandwiched (nip) by the two pressure rolls 14 to thermally press the front end of the film 2B to the substrate PB. In addition, the step roll 5 is returned to the initial state (upper side in FIG. 1), and the slack of the film 2B is prevented between the step roll 5 and the pressure roll 14. At this time, the back tension of the film roll 1 may be increased once to prevent the film 2B from sagging. Next, the film holding bar 20 is moved to a position between the electrode 16 which is a position for transferring the rear end of the film to the pressing roll 14 and the pressing roll 14, and after the movement is completed, the film 2 </ b> B located on the left side of the film holding bar 20 is moved to the film holding bar. Vacuum adsorption is weak at 20. Thereafter, the two pressure rolls 14 rotate while holding (nip) the substrate 14, and convey the substrate 14 to the right. The film 2 </ b> B on the pressure roller 14 slides on the film holding bar 20 while sliding the film 2 </ b> B on the substrate 14. Thermocompression bonding. As the film holding bar 20, it is preferable to use a material whose surface is treated with PTFE (polytetrafluoroethylene) or molded with engineering plastic (MC nylon) so that the film 2B can slide easily.
[0041]
Further, the film cutting process S500 is performed while the film transport member 6 in the film sticking process S400 is moving to the pressure roll 14 side.
[0042]
In the film cutting process S500, the position of the rear end of the film 2B is gradually moved toward the pressure roll 14 before the rear end of the film 2B passes over the cut groove of the rear end holding member 9, and the rotation of the pressure roll 14 is started. Synchronize with speed. When a film portion, which becomes the rear end of the predetermined amount of the film to be attached during the film thermocompression bonding (pasting), passes over the cut groove of the rear end holding member 9, the film 2B is formed by the front end holding member 7 and the rear end holding member 9. Is held by suction. Whether the rear end position of the film 2B has passed over the cut groove is determined by the number of pulses from an encoder provided on the main shaft of the film roll 1 or the pressure roll 14. In the film cutting, the cutter 13 is moved in the width direction while the film transport member 6 is moving to the film leading end delivery position to cut the film 2B. The width of the film 2B (2A) matches the width desired to be attached to the substrate PB, and the length of the film 2B (2A) matches the length desired to be attached to the substrate PB by cutting with the cutter 13, so that the film 2B (2A) has a shape desired to be attached to the surface of the substrate.
[0043]
After cutting the film 2B, the rear end holding member 9 is moved rightward and retracted while holding the rear end of the film 2B by suction, but the rear end of the film 2B is conveyed to the substrate PB side by the pressure roll 14. The upper surface of the holding member 9 is slid away from the upper surface, and is weakly vacuum-sucked and held only by the film holding bar 20.
[0044]
Before the rear end of the film 2B slips on the film holding bar 20, the high voltage is again applied to the electrode 16 from the static electricity generator 17 to apply a charge to the rear end of the film 2B on the film holding bar 20, The rear end of the film 2B is separated from the film holding bar 20 and moved to the pressure roll 14 to be electrostatically attracted to the pressure roll 14 sequentially. When the rear end of the film 2B passes the electrode 16, the application of the high voltage from the static electricity generator 17 to the electrode 16 is stopped, and the film holding bar 20 is retracted above the pressure roll 14. This makes it possible to hold the rear end of the film 2B to the end and transfer it to the pressure roll 14, so that the rear end of the film 2B does not hang down on the substrate PB, and the constant distance from the front end to the rear end of the film 2B is maintained. Can be attached to the substrate PB while applying a tensile force.
[0045]
The substrate 14 on which a film having a shape to be attached to the surface of the substrate PB is thermocompression-bonded is transported to a downstream machine by rotation of a transport roller 15.
[0046]
Then, it is determined whether or not a new substrate PB has been carried in next in a determination process S600 of whether or not it is over, and if there is a next substrate PB, the process returns to the film delivery process S200 to repeat the processing operation described above.
[0047]
As described above, since the entire film from the front end to the rear end of the film to be pasted is adhered to the surface of the substrate PB by the pressure roll 14, the adhered film has no steps and has a flat finish. I have. Further, since the pressure roll 14 securely sucks the leading end and the trailing end of the film, no wrinkles and bubbles are generated at the leading end and the trailing end of the film attached to the substrate PB.
[0048]
In the film sticking apparatus, the silicon rubber surface of the pressure bonding roll 14 is neutralized by the static elimination device 19 located on the upstream side with respect to the electrode 16 during the rotation of the pressure bonding roll 14, and the pressure bonding roll 14 keeps the same surface state in terms of potential. The front and rear ends of the film 2B can be electrostatically attracted and held. In addition, if the surface of the substrate PB to which the film is attached is neutralized by the neutralization device 19 at the same time, the neutralization processing may not be performed later. The static eliminator 19 may also neutralize the film holding bar 20 when the film holding bar 20 is positioned above the pressure roll 14.
[0049]
When the substrate PB is not continuously transported and a substrate waiting state occurs, the pressure roller 14 may be rotated to constantly remove the static electricity from the silicon rubber surface.
[0050]
In the embodiment described above, the mechanism and the method for attaching the film to the upper surface of the substrate PB have been described. However, in the case where the film is also attached to the lower surface of the substrate PB, as shown in FIG. By arranging a mechanism similar to the mechanism below the transport path, it is possible to attach the mechanism to the lower surface of the substrate.
[0051]
In FIG. 4, components having the same or similar functions as those shown in FIG. 1 are denoted by the same reference numerals.
[0052]
In the embodiment shown in FIGS. 1 and 4, the film holding bar 20 is omitted, and the delivery of the rear end of the film 2 </ b> B to the pressure roll 14 may be performed by the rear end holding member 9 that is close to the vicinity of the pressure roll 14. good. In this case, since the rear end holding member 9 is located outside the dust cover 18 and is hardly affected by the application of electric charge from the electrode 16, it is not necessary to eliminate the charge.
[0053]
In the embodiment shown in FIGS. 1 and 4, a sensor for detecting the surface potential of the pressure-bonding roll 14 is provided on the pressure-bonding roll 14, and when the potential becomes higher than a desired potential, the static eliminator 19 is activated to save power. You can try it.
[0054]
【The invention's effect】
As described above, according to the present invention, the film can be stuck flatly on the substrate from the front end portion to the rear end portion without any step.
Further, according to the present invention, the film can be stuck on the substrate from the leading end to the trailing end without wrinkles or bubbles.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a film sticking apparatus according to one embodiment of the present invention.
FIG. 2 is a diagram illustrating a film rear end holding unit and a front end holding unit of FIG. 1;
FIG. 3 is a flowchart illustrating an operation procedure in the film sticking apparatus of FIG. 1;
FIG. 4 is a schematic sectional view showing a film sticking apparatus according to another embodiment of the present invention.
[Explanation of symbols]
1: Film roll
2A, 2B ... film
2a ... Cover film
2b: Resist film
2c: Base film
3 ... take-up roll
4: Separator bar
5 ... Step roll
6. Film transport member
7. Tip holding member
8,10 ... Air cylinder
9: Rear end holding member
11 ... Servo motor
12 ... Ball screw
13 ... Cutter
14 ... Crimping roll
15 ... Conveying roller
16 ... electrodes
17. Static electricity generator
18 ... Dustproof cover
19 ... static eliminator
20 ... Film holding bar
23 ... Control device
24 ... Monitor
25 ... Keyboard

Claims (4)

基板の表面に貼り付けたい形状のフィルムを圧着ロールによって基板の表面に貼り付けるフィルム貼付方法において、
貼り付けたい形状のフィルムの先端部に電荷を付与して該先端部を該圧着ロールの外周面に両者の間に働く静電力で保持せしめ、該圧着ロールの回転により該貼り付けたい形状のフィルムを基板に搬送して該先端部を基板の貼り付け開始位置に一致せしめるとともに該貼り付けたい形状のフィルムを基板の表面に貼り付けて行き、該貼り付けたい形状のフィルムの後端部も電荷を付与して該後端部を該圧着ロールの外周面に両者の間に働く静電力で保持せしめ、該先端部から該後端部までの該貼り付けたい形状のフィルム全てを該圧着ロールの回転により基板に貼り付け、回転する該圧着ロールは該先端部および該後端部を該圧着ロールの外周面で保持する該圧着ロールの上流位置において除電していることを特徴とするフィルム貼付方法。
In a film sticking method of sticking a film of a shape to be attached to the surface of the substrate to the surface of the substrate by a pressure roll,
An electric charge is applied to the tip of the film to be attached, the tip is held on the outer peripheral surface of the pressure roll by electrostatic force acting between the two, and the film of the shape to be attached is rotated by rotation of the pressure roll. To the substrate so that the leading end of the film matches the starting position of the substrate, and the film of the desired shape is attached to the surface of the substrate. To allow the rear end portion to be held on the outer peripheral surface of the pressure roll by electrostatic force acting between them, and all the films of the shape to be attached from the front end portion to the rear end portion of the pressure roll are A film sticking method, wherein the press roll, which is attached to a substrate by rotation and rotates, is neutralized at an upstream position of the press roll in which the front end and the rear end are held on the outer peripheral surface of the press roll. .
上記請求項1に記載のものにおいて、貼り付けたい形状のフィルムの先端部を該圧着ロールの外周面で保持し該圧着ロールの回転により該貼り付けたい形状のフィルムを基板に搬送する間は貼り付けたい形状のフィルムに掛かる張力を弱めていることを特徴とするフィルム貼付方法。2. The method according to claim 1, wherein the tip of the film to be attached is held on the outer peripheral surface of the pressure roll, and the film of the shape to be attached is transported to the substrate by rotating the pressure roll. A film sticking method, wherein the tension applied to a film of a desired shape is reduced. 基板の表面に貼り付けたい形状としたフィルムを圧着ロールによって基板の表面に貼り付けるフィルム貼付装置において、
該貼り付けたい形状としたフィルムを静電力で保持する機能を有する圧着ロールと、該貼り付けたい形状としたフィルムの先端部を保持して該先端部を該圧着ロールの外周面に受け渡すフィルム先端保持部材と、該貼り付けたい形状としたフィルムの後端部を保持して該後端部を該圧着ロールの外周面に受け渡すフィルム後端保持部材と、該貼り付けたい形状としたフィルムの先端部および後端部に電荷を付与する手段と、該圧着ロールが回転しているときに該先端部そして後端部を該圧着ロールの外周面で保持する該圧着ロールの上流位置で該圧着ロールを除電する手段とを有し、
該圧着ロールは除電してあるその外周面で該先端部を静電力で保持し、該圧着ロールの回転により該貼り付けたい形状としたフィルムを基板に搬送して該先端部を基板の貼り付け開始位置に一致せしめるとともに該貼り付けたい形状としたフィルムを基板の表面に貼り付けて行き、該後端部も除電してある該圧着ロールの外周面で静電力により保持して該圧着ロールの回転により該先端部から該後端部までの該貼り付けたい形状としたフィルム全てを基板に貼り付けることを特徴とするフィルム貼付装置。
In a film sticking device that sticks a film with a shape to be attached to the surface of the substrate to the surface of the substrate by a pressure roll,
A pressure roll having a function of holding the film to be pasted by electrostatic force, and a film for holding the tip of the film to be pasted and transferring the tip to the outer peripheral surface of the pressure roll A front end holding member, a film rear end holding member for holding a rear end of the film to be pasted and transferring the rear end to the outer peripheral surface of the pressure roll, and a film having the shape to be pasted Means for applying a charge to the leading end and the trailing end of the pressing roll at an upstream position of the pressing roll for holding the leading end and the trailing end on the outer peripheral surface of the pressing roll when the pressing roll is rotating. Means for neutralizing the pressure roller,
The crimping roll holds the leading end with electrostatic force on the outer peripheral surface from which the charge has been removed, and transports the film having the desired shape to the substrate by rotating the crimping roll, and attaches the leading end to the substrate. The film having the shape desired to be adhered is adhered to the surface of the substrate at the same time as the start position, and the rear end portion is also held by the electrostatic force on the outer peripheral surface of the pressure-bonding roll from which the charge has been removed. A film sticking apparatus, wherein all the films having the desired shape from the front end to the rear end are rotated and attached to a substrate.
上記請求項3に記載のものにおいて、上記除電する手段は、除電ブラシおよびイオナイザーの少なくとも1種であることを特徴とするフィルム貼付装置。4. A film sticking apparatus according to claim 3, wherein said means for removing electricity is at least one of a removing brush and an ionizer.
JP2003030264A 2003-02-07 2003-02-07 Film sticking method and apparatus Expired - Fee Related JP3774701B2 (en)

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TW092114756A TWI236965B (en) 2003-02-07 2003-05-30 Film adhering method and device
CNB031466583A CN1307033C (en) 2003-02-07 2003-07-10 Thin film sticking method and device thereof
KR1020030052640A KR100550649B1 (en) 2003-02-07 2003-07-30 A method for adhesion of film and an apparatus thereof

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