JP2015501506A - マイクロキャビティキャリアベルト及びその製造方法 - Google Patents
マイクロキャビティキャリアベルト及びその製造方法 Download PDFInfo
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- JP2015501506A JP2015501506A JP2014530713A JP2014530713A JP2015501506A JP 2015501506 A JP2015501506 A JP 2015501506A JP 2014530713 A JP2014530713 A JP 2014530713A JP 2014530713 A JP2014530713 A JP 2014530713A JP 2015501506 A JP2015501506 A JP 2015501506A
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- belt
- conductive film
- adhesive
- microcavity
- anisotropic conductive
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Abstract
Description
位置変化=[Norm.s.dis (rand ( )×3.2, true)−0.5]×2×X%
Norm.s.disは標準正規分布関数であり、randは乱数関数である。標準正規分布関数Norm.s.dis (rand ( ))は、主な位置の誘導が−1〜1間の純粋なランダム分布とは対照的に両端(例えば多くのデータは1又は−1のいずれかに近い)付近に存在するように、単純な乱数関数に代えて選択される。標準正規分布関数Norm.s.dis (rand ( ))は、Microsoft社のExcelに特有であるが、正規分布関数及び乱数発生器を用いる概念はいずれの統計パッケージにも適用可能である。本発明においては、X%は設計位置内の変数である。一実施形態においては、X%は1〜40%、好ましくは約3〜20%、より好ましくは約5〜10%から選択される。方程式中の3.2の数値は標準正規分布関数における3.2シグマを意味する。X%はキャビティ距離パターン(例えば5−3,5−5等)に基づき選択される。(変動因子が2つの隣接キャビティに対して−1〜1の範囲である)2×X%は2つのキャビティ間の設計方向の最大距離であり、2つの隣接粒子間の最大距離である。用いたキャビティパターンに基づくと、導電性粒子間の距離が計算され、距離が要求される導電性粒子分配に適合するように、X%が選択される。
DuPont社製KaptonポリイミドフィルムVN300に基づくマイクロキャビティフィルム(PIMC)をタングステンカーバイドブレードにより所定の斜角に切断した。2つのPIMC切断側壁を、コロナ−基材間距離1/4インチ、出力40W、速度3インチ/分でコロナ処理した。Gelest社製1%ポリイミド接着促進剤(アミノフェニルトリメトキシシラン混合異性体)溶液を両側壁に塗工し、少なくとも15分間大気乾燥した。マイクロキャビティをひっくり返してPIMCの両端をライトボックスの上部に配置した。ライトボックスは、視覚的に良好に配列するよう平滑で半透明な表面を有する。ループを形成するために真空下両端を連結し、任意に顕微鏡下でスティッチングラインのギャップを可能な限り低減した。Ideal9190テープのようなマスキングテープの帯をスティッチングラインのキャビティ側に配置した。非キャビティ側からスティッチングギャップにDow Corning社製SE9187Lシリコーンシール材のような充填剤を塗工した。ギャップ充填剤を硬化し、非キャビティ側のスティッチング領域全体をコロナ処理した。スティッチングラインを補強するために、12.5ミクロンのPETフィルム上に7.5ミクロンDAP Weldwood Contact Cement(ポリクロリネート化ゴム接着剤)を設けた裏打ちフィルムを非キャビティ側に塗工した。図1に概念的に示された粒子充填転写ステーション上に載置するために、マイクロキャビティ側のマスキングテープを剥がし、スティッチされたPIMCループを用意した。
裏打ちフィルムを5分間エポキシ混合したLocktite社製の塗膜に代えた以外は実施例1を繰り返した。得られた試料は強い引っ張り強度を示し、ループが600〜1000g/inの張力下で引っ張られた場合においても、スティッチングラインのギャップに変化は見られなかった。
充填材料を98重量%のエポキシ基剥離性塗膜UV9300及び2重量%のカチオン性光開始剤UV9390C(両者ともオハイオ州ColumbusのMomentive社製)を含むUV硬化型組成物に代えた以外は実施例1を繰り返した。Dymax社製の登録商標BlueWave200UVスポットランプを用いて充填剤を硬化させた。
実施例3を繰り返し、図4に示したようにスティッチングラインの端でスティッチされたループの各端部に3M社製の425アルミホイルテープ(2.8milアルミニウム裏打ち及び1.8milアクリル接着剤)を塗工した。得られた試料は強い引っ張り強度を示し、ループが500〜1000g/inの張力下で引っ張られた場合においても、スティッチングラインのギャップに変化は見られなかった。
DuPont社製KaptonポリイミドフィルムVN300に基づくPIMCフィルムをタングステンカーバイドブレードにより60度の傾斜に切断した。マイクロキャビティウェブの両端を接合し、98重量%のエポキシ基剥離性塗膜UV9300及び2重量%のカチオン性光開始剤UV9390Cを含むUV硬化型組成物でギャップを充填することによりマイクロキャビティループを作製した。Dymax社製の登録商標BlueWave200UVスポットランプを用いて充填剤を硬化させた。スティッチングラインの全領域を覆うために、Nitto Denko K.K.社製の1milポリイミドテープP-221AMBを非キャビティ側に積層し、3M社製の425アルミホイルテープでスティッチされたループの両端をさらに補強した。図9はUV硬化型組成物で充填された3ミクロン幅の45度傾斜スティッチングラインを有するループ状のマイクロキャビティを示した写真である。図1に概念的に示された粒子充填転写ステーション上にマイクロキャビティループを載置した。
UV硬化型充填剤の組成を99重量%のUV681(ペンシルバニア州PottstownのPermabond社製)及び1重量%のEbecryl350(ニュージャージー州WoodlandParkのCytec社製)に代え、ポリイミド裏打ち補強テープを0.5mmilUV硬化型アクリレート3922(オハイオ州WestlakeのLoctite社製)でプレコートされた0.5milPET基材に代えた以外は実施例5を繰り返した。登録商標BlueWave200UVスポットランプを用いて充填剤及び裏打ち補強材を硬化した。得られた試料は強い引っ張り強度を示し、ループが500〜1000g/inの張力下で引っ張られた場合においても、スティッチングラインのギャップに変化は見られなかった。粒子転写後のスティッチングラインの平均ギャップは約16ミクロンであり、全スティッチ領域では導電性粒子凝集は見られなかった。
固定アレイパターンPIMCキャリアループベルト上に導電性粒子の層を積層することにより、加熱及び/又は加圧環境下で除去される剥離性塗膜と、加熱及び/加圧環境下で軟化される9〜18ミクロン厚の非導電性接着剤層と、非導電性接着剤層上の導電性粒子層とを備えた剥離性ライナーを有する異方性導電性接着剤フィルムを形成した。非導電性接着剤層は、インライン混合工程を通して混合される樹脂及び硬化剤を含む。非導電性接着剤層はインラインコロナ処理剥離性ライナー上にスロットダイコータから5〜10fpmで塗工される。残留溶媒を除去するために、導電性粒子を積層する前に、塗工速度に応じて20〜55℃に接着剤塗工フィルムを予加熱する。積層後、非導電性接着剤層内に導電性粒子を埋め込み、異方性導電接着剤フィルムを形成し、次いで、残留溶媒を除去するために塗工速度に応じて約75〜80℃にしたポスト乾燥オーブン内にこのフィルムを通過する。保管及び出荷用のロールを形成するために、異方性導電性フィルム及び剥離性ライナーを巻き上げる。図10は約17ミクロン幅の45度傾斜スティッチングラインを作製されたACFを示す写真である。図11A及びBは、45度傾斜の3ミクロンスティッチングラインを有するACFと連結された電子デバイス(図11A)及び60度傾斜の50ミクロンスティッチングラインで連結された電子デバイス(図11B)を示す写真である。
実施例7に記載された方法を用いて、剥離性ライナー上に非導電性接着剤塗工を塗工した。スロットダイコータを用いて塗工し、次いで、予乾燥し、ポリイミドレーザー切断フィルム上にAu粒子を事前分配することにより形成された固定アレイパターンを積層した。積層を通してAu粒子を転写した後、異方性導電性接着剤フィルムを形成し、次いで、溶媒を除去するためにオーブン内でポスト乾燥し、フィルムを細長く切り、巻き戻した。
実施例7を繰り返し、加圧ローラにより長尺ウェブ上に接着剤塗工を積層した。接着剤塗工ウェブはマイクロキャビティウェブよりも僅かに広く、マイクロキャビティウェブ及び接着剤塗工ウェブは積層前に整列された。例えば、接着剤塗工ウェブがマイクロキャビティウェブより1/4インチ広い場合には、2枚のウェブ間のウェブ端差は1/8インチ未満であろう。積層ローラの幅がマイクロキャビティ領域のものより広く、キャリアフィルムよりも強化材の両側分小さいため、各非キャビティ側上に3/8インチ幅アルミホイルテープを備えた4.5インチ幅ポリイミドキャリアフィルム上に3.0インチマイクロキャビティに3.5インチ幅積層ローラを用いた。ACFロールを形成するために、積層ローラ及びマイクロキャビティウェブ上のウェブ速度、積層圧力、温度、転写前の接着剤塗工の残留溶媒濃度を転写効率99%超に調整し、又は、ほとんど全ての充填された導電性粒子を接着剤塗工に転写する。この場合、ウェブ速度7ft/min、積層圧力50psi、室温、接着剤塗工の残留溶媒濃度1.5%を転写のために選択した。
Claims (52)
- 長尺キャリアベルトの表面上に形成されたマイクロキャビティアレイ内に複数の導電性粒子を分配する工程と、
前記ベルトの表面と接触する接着剤層の表面を搬送しつつ、前記導電性粒子を載置する前記ベルトを回転する工程と、
前記ベルト上のマイクロキャビティから、前記ベルト上の前記マイクロキャビティアレイに対応する前記接着剤層の予め定められた位置に、前記導電性粒子を移す工程と、
前記ベルトの表面から前記接着剤層を分離する工程とを備えることを特徴とする電子装置又はコンポーネントの製造方法。 - 前記マイクロキャビティのアレイ内に複数の導電性粒子を配置する工程は、1つのマイクロキャビティ内にそれぞれ導電性粒子を嵌め込む工程を含むことを特徴とする請求項1に記載の方法。
- 前記ベルトは、ベルトの一端からベルトの端部に対して傾斜角度を有する他端にベルトと交差して延在するスティッチングラインを有する選択されたループであることを特徴とする請求項1に記載の方法。
- 前記傾斜角度は、導電性粒子に電極が接触しない確率を低減し、結合後の接触抵抗と整合するために、先記デバイスの前記電極の位置、サイズ又は数に基づいて選択されることを特徴とする請求項3に記載の方法。
- 前記傾斜角度は約30〜80度であることを特徴とする請求項4に記載の方法。
- 前記傾斜角度は約35〜60度であることを特徴とする請求項5に記載の方法。
- 前記スティッチングラインは幅約100ミクロン未満のギャップを有することを特徴とする請求項3に記載の方法。
- 前記ギャップは幅約20ミクロン未満であることを特徴とする請求項7に記載の方法。
- 前記ギャップは前記導電性粒子に付着しない充填組成物で充填されることを特徴とする請求項7に記載の方法。
- 前記スティッチングラインの前記ギャップは、溶媒蒸発、室温加硫(RTV)、UV、熱、湿気又はこれらの組み合わせによりにより硬化可能接着剤又はな塗膜で充填されることを特徴とする請求項9に記載の方法。
- 前記硬化型接着剤又は塗膜は、シリコーン、ポリイソシアネート、ポリウレタン、エポキシ、アクリル、アクリレート、メタクリレート、ビニルエーテル、加硫性熱可塑性エラストマー及び不飽和ゴムから選択されることを特徴とする請求項10に記載の方法。
- 前記充填スティッチングラインは、さらにレーザー除去され、前記充填材料上にマイクロキャビティを形成することを特徴とする請求項9に記載の方法。
- 前記ベルトは、ポリエチレンテレフタレート(PET)、ポリエチレンナフタレート(PEN)、ポリカーボネート、ポリアミド、ポリアクリレート、ポリスルホン、ポリエーテル、ポリイミド、液晶ポリマー及びコポリマー、並びに、これらの混合物、複合物、積層物又はサンドイッチフィルムから選択されたウェブ材料から形成されることを特徴とする請求項1に記載の方法。
- マイクロキャビティアレイは、制御様式で変更される距離まで互いに分離されるキャビティを含み、周期的欠陥の効果を低減又は防止することを特徴とする請求項1に記載の方法。
- 前記マイクロキャビティ間の距離は乱数発生関数を含むアルゴリズムに基づき変更されることを特徴とする請求項14に記載の方法。
- 前記アルゴリズムは正規分布関数を追加的に含むことを特徴とする請求項15に記載の方法。
- 前記マイクロキャビティ間の距離は約1〜40%変更されることを特徴とする請求項16に記載の方法。
- 前記アルゴリズムは下記方程式を満たすことを特徴とする請求項17に記載の方法。
位置変化=[Norm.s.dis (rand ( )×3.2, true)−0.5]×2×X%
Xは約1〜40%である。 - 前記方法は、前記導電性粒子を載置する前記回転ベルトの表面に前記接着剤層を接触する前に、前記接着剤層をアニールする追加的なステップを含むことを特徴とする請求項1に記載の方法。
- 前記接着剤層はポリマーを含み、前記アニールステップは、前記接着剤の軟化又は加熱ひずみ温度よりも高く、前記接着剤層が硬化し始める開始温度未満の温度に前記接着剤層を加熱する工程を含むことを特徴とする請求項19に記載の方法。
- 前記ポリマーは、アクリル、エポキシ又はフェノール樹脂であることを特徴とする請求項20に記載の方法。
- マイクロキャビティの非ランダムアレイを形成する工程と、
前記マイクロキャビティ内に導電性粒子を配置する工程とを備え、
前記マイクロキャビティのアレイ内に複数の導電性粒子を配置する工程は、1つのマイクロキャビティ内に前記導電性粒子のそれぞれを嵌め込むための粒子分配工程を含み、
前記マイクロキャビティ間の距離は、乱数発生関数を含むアルゴリズムを用いて制御されることを特徴とする電子デバイス又はコンポーネントの製造方法。 - 前記アルゴリズムは正規分布関数を追加的に含むことを特徴とする請求項22に記載の方法。
- 前記マイクロキャビティ間の距離は約1〜40%変更されることを特徴とする請求項23に記載の方法。
- 接着剤層内又は接着剤上の非ランダムアレイとして予め決められた非ランダム粒子位置に配置される複数の導電性粒子を備えた異方性導電性フィルムであって、
前記非ランダム粒子位置は、
乱数発生関数を用いるアルゴリズムを用いて決定された制御様式で変更されることを特徴とする異方性導電性フィルム。 - 前記導電性粒子は前記接着剤層内に部分的に埋め込まれることを特徴とする請求項25に記載の異方性導電性フィルム。
- 前記アルゴリズムは正規分布関数を追加的に含むことを特徴とする請求項25に記載の異方性導電性フィルム。
- 前記マイクロキャビティ間の距離は約1〜40%変更されることを特徴とする請求項27に記載の異方性導電性フィルム。
- 接着剤層内又は接着剤上の非ランダムアレイとして予め決められた非ランダム粒子位置に配置される複数の導電性粒子を備えた異方性導電性フィルムであって、
前記異方性フィルムは、前記異方性導電性フィルムと交差して延在する斜角ラインに対応する導電性粒子を実質的に含まない領域を備えることを特徴とする異方性導電性フィルム。 - 前記導電性粒子は前記接着剤層内に部分的に埋め込まれることを特徴とする請求項29に記載の異方性導電性フィルム。
- 前記異方性導電性フィルムは請求項3に記載の方法により製造されることを特徴とする請求項29に記載の異方性導電性フィルム。
- 前記傾斜ラインは約30〜80度であることを特徴とする請求項31に記載の異方性導電性フィルム。
- 前記傾斜ラインは約35〜60度であることを特徴とする請求項32に記載の異方性導電性フィルム。
- 前記傾斜ラインは幅約100ミクロンであることを特徴とする請求項29に記載の異方性導電性フィルム。
- 前記傾斜ラインは幅約20ミクロンであることを特徴とする請求項34に記載の異方性導電性フィルム。
- 前記接着剤はアクリル、エポキシ又はフェノール樹脂を含むことを特徴とする請求項29に記載の異方性導電性フィルム。
- 前記異方性導電性フィルムは、前記異方性導電性フィルムと交差して延在する傾斜ラインに対応する導電性粒子を本質的に含まない領域を含むことを特徴とする請求項25に記載された異方性導電性フィルム。
- 前記傾斜ラインは約30〜80度であることを特徴とする請求項37に記載の異方性導電性フィルム。
- 前記傾斜ラインは約35〜60度であることを特徴とする請求項38に記載の異方性導電性フィルム。
- 前記傾斜ラインは幅約100ミクロンであることを特徴とする請求項37に記載の異方性導電性フィルム。
- 前記傾斜ラインは幅約20ミクロンであることを特徴とする請求項40に記載の異方性導電性フィルム。
- 前記接着剤はアクリル、エポキシ又はフェノール樹脂を含むことを特徴とする請求項25に記載の異方性導電性フィルム。
- 少なくとも2つの切断面を形成するために、表面上のマイクロキャビティの非ランダムアレイを有する少なくとも1枚のウェブを切断する工程と、
前記切断面を当接する工程と、
スティッチングラインを形成するために、前記当接切断面に充填組成物又は接着剤を塗工する工程とを備えることを特徴とする電子デバイス又はコンポーネントの製造に有用な表面上のマイクロキャビティを有するキャリアベルトの形成方法。 - 前記方法は、前記スティッチングラインの領域内に追加的なマイクロキャビティを形成する追加的なステップを含むことを特徴とする請求項43に記載の方法。
- 前記マイクロキャビティを有する表面に対向する前記ウェブの表面に接着剤又は塗膜を塗工する追加的なステップを含むことを特徴とする請求項44に記載の方法。
- 前記切断端面に塗工された前記硬化充填組成物又は接着剤は導電性粒子に付着しないことを特徴とする請求項43に記載の方法。
- 前記充填組成物又は接着剤は、
アクリル、シリコーン、ポリイソシアネート、ポリウレタン、エポキシ、アクリレート、メタクリレート、ビニルエーテル、ビニルエステル、加硫性熱可塑性エラストマー及び不飽和ゴムから選択された硬化型接着剤又は塗膜であることを特徴とする請求項46に記載の方法。 - 前記方法は、前記接着剤を塗工する前に切断端面をコロナ処理するステップを含むことを特徴とする請求項43に記載の方法。
- 前記スティッチングラインは、その両端で構造テープによりさらに補強されることを特徴とする請求項43に記載の方法。
- クレーム43の方法により調製されたマイクロキャビティベルト又はループ。
- 長尺キャリアベルト又はループの主要表面上のマイクロキャビティのアレイと、
前記ベルト又はループの一端から他端に前記ベルト又はループと交差して延在するスティッチングラインとを備えることを特徴とする電子デバイス又はコンポーネントの製造に有用なベルト又はループ。 - 前記スティッチングラインは、前記ベルト又はループと交差して延在する斜角ラインであることを特徴とする請求項51に記載のベルト又はループ。
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US9102851B2 (en) | 2015-08-11 |
CN103814094A (zh) | 2014-05-21 |
KR20140069139A (ko) | 2014-06-09 |
TW201614685A (en) | 2016-04-16 |
TWI613679B (zh) | 2018-02-01 |
KR101661128B1 (ko) | 2016-09-29 |
TWI521550B (zh) | 2016-02-11 |
WO2013039809A3 (en) | 2013-08-29 |
TW201330013A (zh) | 2013-07-16 |
WO2013039809A2 (en) | 2013-03-21 |
US20130071636A1 (en) | 2013-03-21 |
EP2756048A2 (en) | 2014-07-23 |
CN103814094B (zh) | 2017-02-15 |
SG2014014518A (en) | 2014-07-30 |
JP6072803B2 (ja) | 2017-02-01 |
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