JP5944102B2 - 回路接続材料、それを用いた接続構造体 - Google Patents
回路接続材料、それを用いた接続構造体 Download PDFInfo
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- JP5944102B2 JP5944102B2 JP2010548314A JP2010548314A JP5944102B2 JP 5944102 B2 JP5944102 B2 JP 5944102B2 JP 2010548314 A JP2010548314 A JP 2010548314A JP 2010548314 A JP2010548314 A JP 2010548314A JP 5944102 B2 JP5944102 B2 JP 5944102B2
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- C08G59/5073—Amines heterocyclic containing only nitrogen as a heteroatom having two nitrogen atoms in the ring
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/226—Mixtures of di-epoxy compounds
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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Description
(a)エポキシ樹脂としては、ビスフェノールA、F、AD等のビスフェノールのグリシジルエーテルであるビスフェノール型エポキシ樹脂及びフェノールノボラック又はクレゾールノボラックから誘導されるエポキシノボラック樹脂が代表的なエポキシ樹脂である。その他の例として、ナフタレン骨格を有するナフタレン型エポキシ樹脂、グリシジルアミン型エポキシ樹脂、グリシジルエステル型エポキシ樹脂、脂環式エポキシ樹脂及び複素環式エポキシ樹脂が挙げられる。これらは単独又は2種以上混合して用いられる。
(b)潜在性硬化剤としては、エポキシ樹脂を硬化させることができるものであればよい。また、潜在性硬化剤は、エポキシ樹脂と反応して架橋構造中に取り込まれる化合物であってもよいし、エポキシ樹脂の硬化反応を促進する触媒型硬化剤であってもよい。両者を併用することも可能である。
フィルム形成材とは、液状物を固形化し構成組成物をフィルム形状とした場合に、そのフィルムの取扱いを容易とし、容易に裂けたり、割れたり、べたついたりしない機械的特性等を付与するものであり、通常の状態(常温常圧)でフィルムとしての取扱いができるものである。
GPC条件
使用機器:日立L−6000 型((株)日立製作所)
カラム:ゲルパックGL−R420+ゲルパックGL−R430+ゲルパックGL−R
440(計3本)(日立化成工業(株)製商品名)
溶離液:テトラヒドロフラン
測定温度:40℃
流量:1.75mL/分
検出器:L−3300RI((株)日立製作所)
(d)成分である熱可塑性ポリマーとしては、カルボン酸ビニルエステルをモノマー単位として含むものであれば特に限定されない。本発明の回路接続材料は、仮圧着工程における所定の加熱温度において(d)成分が溶融(又は軟化)することで粘着性を示し、被着体へ容易に仮接着することができる。また、後述する(e)有機微粒子を接着性向上の目的で回路接続材料に添加する場合、粘着性がやや低下して仮圧着性が低下することがある。特にこの場合、(d)成分は、回路接続材料の粘着性と接着性とを両立するために有効に機能することができる。
本発明に係る回路接続材料には、必要に応じ有機微粒子を配合してもよい。有機微粒子は、応力緩和性を有する耐衝撃緩和剤としての機能を有するものである。回路接続材料が(E)成分として有機微粒子を含むことで、仮圧着後の本接続における各種接続部材との接着性をより一層向上することができる。特に、(b)成分としてカチオン重合型潜在性硬化剤を用いた回路接続材料の場合、被着体に対する接着強度がアニオン重合型潜在性硬化剤を用いた場合よりもやや劣る傾向があるため、(e)成分を添加することで接着性を改善することができる。
「EP−4010S」:プロピレンオキサイド変成エポキシ樹脂(エポキシ当量330〜390、ADEKA製)
「YL983U」:ビスフェノールF型エポキシ樹脂(エポキシ当量165〜175、ジャパンエポキシレジン製)
「BPA328」:アクリル微粒子分散型エポキシ樹脂(アクリル微粒子を17質量%含有、エポキシ当量220〜240、日本触媒製)
「EP−1032H60」:クレゾールノボラック型エポキシ樹脂(エポキシ当量163〜175)
「HX3941HP」:アニオン重合型潜在性硬化剤含有エポキシ樹脂(イミダゾール系マイクロカプセル型硬化剤を35質量%含有ビスフェノールF型及びA型エポキシ樹脂混合タイプ、エポキシ当量160〜190、旭化成ケミカルズ製)
「ZX1356−2」:ビスフェノールA・F共重合型フェノキシ樹脂(Mw50000、東都化成製)
「PKHC」:ビスフェノールA型フェノキシ樹脂(Mw45000、インケム・コーポレーション製)
「アクリルゴムA」:ブチルアクリレート40質量部−エチルアクリレート30質量部―アクリロニトリル30質量部―グリシジルメタクリレート3質量部の共重合体(Mw約85万)
「EXL−2655」:有機微粒子(ブタジエン−スチレン−メタクリレート共重合体から形成されたコアシェルポリマー、ローム・アンド・ハース社製)
「EV40W」:エチレン−酢酸ビニル共重合体(酢酸ビニル含有率41%、Mw80000、融点40℃、メルトフローレート65g/10分、三井・デュポンポリケミカル製)
「EV150」:エチレン−酢酸ビニル共重合体(酢酸ビニル含有率33%、融点61℃、メルトフローレート30g/10分、Mw120000、三井・デュポンポリケミカル製)
「AUL−704」:平均粒径4μmのポリスチレン球状粒子の表面に0.1μmのNi層及びAu層を設けた導電性粒子(積水化学製)
「SH6040」:シランカップリング剤(γ−グリシドキシプロピルトリメトキシシラン、東レ・ダウコーニング・シリコーン(株)製)
「SI−60LA」:カチオン重合型潜在性硬化剤(芳香族スルホニウム塩、三新化学製)
「EP−4010S」30質量部、「YL983U」15質量部、「ZX1356−2」のトルエン/酢酸エチル(=50/50)40質量%溶液50質量部(不揮発分換算で20質量部)、「PKHC」のトルエン/酢酸エチル(=50/50)40質量%溶液50質量部(不揮発分換算で20質量部)、「EXL−2655」15質量部、「EV40W」の20質量%トルエン溶液10質量部(不揮発分換算で2質量部)、「AUL−704」4質量部、「SH6040」(γ−グリシドキシプロピルトリメトキシシラン、東レ・ダウコーニング・シリコーン(株)製)1質量部及び「SI−60LA」3質量部を配合して混合溶液を得た。得られた混合溶液をアプリケータでPETフィルム上に塗布し、70℃10分間の熱風乾燥により、接着剤層の厚み20μmであるフィルム状の回路接続材料を得た。
「YL983U」20質量部、「BPA328」30質量部、「PKHC」のトルエン/酢酸エチル(=50/50)40質量%溶液125質量部(不揮発分換算で50質量部)、「EV40W」の20質量%トルエン溶液10質量部(不揮発分換算で2質量部)、「AUL−704」4質量部、「SH6040」1質量部及び「SI−60LA」3質量部となるように各成分を配合した以外は実施例1と同様にして、フィルム状の回路接続材料を得た。
「EV40W」に変えて、「EV150」を用いた以外は、実施例1と同様にして、フィルム状の回路接続材料を得た。
「EP−1032H60」5質量部、「HX3941HP」35質量部、「PKHC」のトルエン/酢酸エチル(=50/50)40質量%溶液50質量部(不揮発分換算で20質量部)、「アクリルゴムA」のトルエン/酢酸エチル(=50/50)10質量%溶液200質量部(不揮発分換算で20質量部)、「EXL−2655」20質量部、「EV40W」の20質量%トルエン溶液10質量部(不揮発分換算で2質量部)、「AUL−704」4質量部及び「SH6040」1質量部となるように各成分を配合した以外は実施例1と同様にして、フィルム状の回路接続材料を得た。
「BPA328」10質量部、「HX3941HP」40質量部、「PKHC」のトルエン/酢酸エチル(=50/50)40質量%溶液37.5質量部(不揮発分換算で15質量部)、「アクリルゴムA」のトルエン/酢酸エチル(=50/50)10質量%溶液350質量部(不揮発分換算で35質量部)、「EV40W」の20質量%トルエン溶液10質量部(不揮発分換算で2質量部)、「AUL−704」4質量部及び「SH6040」1質量部となるように各成分を配合した以外は実施例1と同様にして、フィルム状の回路接続材料を得た。
「EV40W」を添加しなかった以外は、実施例1と同様にして、フィルム状の回路接続材料を得た。
「EV40W」を添加しなかった以外は、実施例2と同様にして、フィルム状の回路接続材料を得た。
「EV40W」を添加しなかった以外は、実施例4と同様にして、フィルム状の回路接続材料を得た。
「EV40W」を添加しなかった以外は、実施例5と同様にして、フィルム状の回路接続材料を得た。
上記フィルム状の回路接続材料の接着剤層面を、全面に酸化インジウム(ITO)の薄層を有する厚み0.7mmのガラス板に、それぞれ60℃、70℃、80℃で1MPaの条件で、1秒間又は3秒間仮接着した後PETフィルムを剥離することで、仮圧着性を評価した。接着剤層が均一にITO上に転写されている状態を「A」、接着剤層が部分的にITO上に転写されている状態を「B」、接着剤層がITO上に全く転写されない状態を「C」とした。実施例及び参考例の評価結果を表3に、比較例の評価結果を表4に示す。
Claims (9)
- 対向する回路電極同士を電気的に接続する回路接続材料であって、
(a)エポキシ樹脂と、
(b)芳香族スルホニウム塩を含むカチオン重合型潜在性硬化剤と、
(c)前記エポキシ樹脂とは異なる、フィルム形成材と、
(d)前記フィルム形成材とは異なり、カルボン酸ビニルエステルをモノマー単位として含む熱可塑性ポリマーと、
有機微粒子と、
を含有する回路接続材料。 - 前記カルボン酸ビニルエステルが酢酸ビニルである、請求項1記載の回路接続材料。
- 前記熱可塑性ポリマーがオレフィンをモノマー単位として更に含む、請求項1又は2記載の回路接続材料。
- 前記オレフィンがエチレン又はプロピレンである、請求項3記載の回路接続材料。
- 前記カルボン酸ビニルエステルの割合が、前記熱可塑性ポリマーを構成する全モノマー100質量%を基準として、20質量%以上60質量%未満である、請求項1〜4のいずれか一項に記載の回路接続材料。
- 前記熱可塑性ポリマーの重量平均分子量が、40000〜150000である、請求項1〜5のいずれか一項に記載の回路接続材料。
- 前記熱可塑性ポリマーの配合量が、前記エポキシ樹脂及び前記フィルム形成材の合計100質量部に対して、0.5〜5質量部である、請求項1〜6のいずれか一項に記載の回路接続材料。
- 前記フィルム形成材が、フェノキシ樹脂、ポリビニルホルマール樹脂、ポリスチレン樹脂、ポリビニルブチラール樹脂、ポリエステル樹脂、ポリアミド樹脂、キシレン樹脂及びポリウレタン樹脂からなる群より選ばれる少なくとも一種を含む、請求項1〜7のいずれか一項に記載の回路接続材料。
- 第一の基板及び該基板の主面上に形成された第一の回路電極を有する第一の回路部材と、
第二の基板及び該基板の主面上に形成された第二の回路電極を有し、該第二の回路電極と前記第一の回路電極とが対向するように配置され、該第二の回路電極が前記第一の回路電極と電気的に接続されている第二の回路部材と、
前記第一の回路部材及び前記第二の回路部材の間に介在する接続部と、を備え、
前記接続部が、請求項1〜8のいずれか一項に記載の回路接続材料の硬化物である、接続構造体。
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