JP5046366B2 - 接着剤組成物及び該接着剤からなる接着層を備えたシート - Google Patents
接着剤組成物及び該接着剤からなる接着層を備えたシート Download PDFInfo
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- JP5046366B2 JP5046366B2 JP2006282285A JP2006282285A JP5046366B2 JP 5046366 B2 JP5046366 B2 JP 5046366B2 JP 2006282285 A JP2006282285 A JP 2006282285A JP 2006282285 A JP2006282285 A JP 2006282285A JP 5046366 B2 JP5046366 B2 JP 5046366B2
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- adhesive
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- silicone
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- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
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- C09J179/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09J161/00 - C09J177/00
- C09J179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09J179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/10—Block or graft copolymers containing polysiloxane sequences
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Description
(A)ポリイミドシリコーン樹脂 5〜60重量%
(B)軟化温度が80℃以下のエポキシ樹脂 5〜60重量%
(C)イミダゾール化合物とジシアンジアミドから選ばれる少なくとも1のエポキシ樹脂硬化触媒 0.001〜20重量%
(D)平均粒径0.1〜10ミクロンの球状シリカ 20〜70重量%
(E)平均粒径0.1〜10ミクロンを有し、表面上にポリオルガノシルセスキオキサン樹脂微小体を備えるシリコーンゴム球状微粒子 5〜30重量%
を含む接着剤組成物、但し、各重量%は組成物総重量に基づく。
(A)ポリイミドシリコーン樹脂は、シロキサン結合を含むポリイミド樹脂であり、式(2)のX及びYの少なくとも一方がシロキサン結合を有する繰り返し単位を含む。
(A)ポリイミドシリコーン樹脂は、本発明の組成物総重量の5〜60重量%、好ましくは20〜50重量%で含有される。
下記式(5)で表されるジアミンとを、
H2N−Y−NH2 (5)
(但し、Yは上記と同様の意味を示す。)
常法に従って、ほぼ等モルで有機溶剤中で反応させる。
式中、R2は互いに独立に水素原子又はフッ素、臭素、よう素などのハロゲン原子、もしくは炭素原子数1〜8のアルキル基、アルケニル基、アルキニル基、トリフルオロメチル基、フェニル基などの非置換又は置換の一価炭化水素基である。nは1〜5の整数である。A,Bはそれぞれ2種以上であってもよい。Rは水素原子、ハロゲン原子又は非置換もしくは置換一価炭化水素基である。
(式中、Rは水素原子、フッ素、臭素、よう素などのハロゲン原子、又は炭素数1〜8の、アルキル基、アルケニル基、アルキニル基、トリフルオロメチル基、フェニル基などの非置換又はハロゲン置換の1価炭化水素基であり、各芳香族環に付いている置換基は全て同じでも異なっていても構わない。Xは単結合、メチレン、プロピレンである。)
還流冷却器、該還流冷却器に連結されたコック付き25mlの水分定量受器、温度計、撹拌器を備えた1Lのセパラブルフラスコに、3,3’,4,4’−ベンゾフェノンテトラカルボン酸二無水物32.2重量部と、溶媒2−メチルピロリドン150重量部とを仕込み、撹拌して酸無水物を分散させた。該分散物中に、下記式
で示されるジメチルジアミノポリシロキサン(以後、「ジアミノシロキサン−1」という)51.28重量部(上式においてjは、その平均が、平均アミン当量641となる整数である)を2−メチルピロリドン50重量部に分散させた溶液を滴下して、室温にて1時間撹拌反応させることにより、酸無水物リッチのアミック酸オリゴマーを合成した。
合成例1において、3,3’,4,4’−ベンゾフェノンテトラカルボン酸二無水物の代わりに、3,4−ジカルボキシフェニルエーテル酸ニ無水物31.0重量部を、64.1重量部のジアミノシロキサン−1 を、フェノールジアミン−1の代わりに
下記式
に示すフェノール性水酸基を有する芳香族ジアミン(フェノールジアミン−2)12.9重量部を、合計で325重量部の2−メチルピロリドンを用いた以外は、合成例1に準じて、フェノール性水酸基を有するポリイミドシリコーン樹脂−2を得た。分子量は、63,000であった。
合成例1において、3,3’,4,4’−ベンゾフェノンテトラカルボン酸二無水物の代わりに6FDA(2,2−ビス(3,4−ジカルボキシフェニル)ヘキサフルオロプロパン)44.4重量部を、ジアミノシロキサン−1の代わりに、ジアミノシロキサン−1とアミン当量のみ異なる(アミン当量407)ジメチルジアミノポリシロキサン(以降、「ジアミノシロキサン−2」という)56.98重量部を、フェノールジアミン−1の代わりに、BAPP(2,2−ビス[4−(4−アミノフェノキシ)フェニル]プロパン)12.3重量部を、合計で340重量部の2−メチルピロリドンを用いた以外は合成例1に準じて、ポリイミドシリコーン樹脂−3を得た。分子量は、72,000であった。
合成例1において、3,3’,4,4’−ベンゾフェノンテトラカルボン酸二無水物の代わりに6FDA(2,2−ビス(3,4−ジカルボキシフェニル)ヘキサフルオロプロパン)44.4重量部を、ジアミノシロキサン−1に代えて0.51重量部のジメチルジアミノポリシロキサン−2を、 フェノールジアミン−1の代わりに、BAPP(2,2−ビス[4−(4−アミノフェノキシ)フェニル]プロパン)34.44重量部を、合計で290重量部の2−メチルピロリドンを用いた以外は合成例1に準じて、ポリイミドシリコーン樹脂−4を得た。分子量は74,000であった。
合成例1〜4で得られたポリイミド樹脂1〜4の40重量部を、シクロヘキサノン60重量部に溶解し、ポリイミド樹脂溶液を得た。
各ポリイミド樹脂溶液に、下記表1に示すエポキシ樹脂、触媒、シリカ、及び複合シリコーンゴム微粒子を同表に示す配合量で、自転・公転方式の混合機((株)シンキー社製)で混合して、接着剤組成物を調製した。
各接着剤組成物を、フッ素シリコーン離型剤を被覆した厚さ50μmのPETフィルム上に塗布して、120℃で30分間加熱乾燥し、約50μm厚さ及び約25μm厚さの接着層を夫々形成した。
[調製例1]
(CH3)3SiO1/2単位1.1モルとSiO2単位1モルの割合からなるメチルポリシロキサンレジンを60重量%含むトルエン溶液33.33重量部、末端及び側鎖にビニル基を100gr当たり0.002モル有する重合度2,000の生ゴム状のジメチルポリシロキサン80重量部とトルエン172重量部を均一になるまで溶解し、次いで、この混合溶液に、下記構造のケイ素原子結合水素原子を有するオルガノポリシロキサン化合物0.68重量部と反応抑制剤として3−メチル−1−ブチン−3−オール0.24重量部混合し、次いでこの混合物に白金量が40ppmとなるような塩化白金酸の2−エチルヘキサノール変性溶液とを混合し、シリコーン粘着剤組成物−Iを調製した。
調製例1に準じて、(CH3)3SiO1/2単位1.1モルとSiO2単位1モルの割合からなるメチルポリシロキサンレジンを60重量%含むトルエン溶液50重量部、末端及び側鎖にビニル基を100gr当たり0.002モル有する重合度2,000の生ゴム状のジメチルポリシロキサン70重量部、トルエン165.7重量部、上記構造のケイ素原子結合水素原子を有するオルガノポリシロキサン化合物0.64重量部、反応抑制剤として3−メチル−1−ブチン−3−オール0.24重量部と白金量が40ppmとなるような塩化白金酸の2−エチルヘキサノール変性溶液とから、シリコーン粘着剤組成物−IIを調製した。
調製例1に準じて、(CH3)3SiO1/2単位1.1モルとSiO2単位1モルの割合からなるメチルポリシロキサンレジンを60重量%含むトルエン溶液16.66重量部、末端及び側鎖にビニル基を100gr当たり0.002モル有する重合度2,000の生ゴム状のジメチルポリシロキサン90重量部、トルエン180重量部、上記構造のケイ素原子結合水素原子を有するオルガノポリシロキサン化合物0.77重量部、反応抑制剤として3−メチル−1−ブチン−3−オール0.24重量部と白金量が40ppmとなるような塩化白金酸の2−エチルヘキサノール変性溶液とから、シリコーン粘着剤組成物−IIIを調製した。
調製例1に準じて、(CH3)3SiO1/2単位1.1モルとSiO2単位1モルの割合からなるメチルポリシロキサンレジンを60重量%含むトルエン溶液83.33重量部、末端及び側鎖にビニル基を100gr当たり0.002モル有する重合度2,000の生ゴム状のジメチルポリシロキサン50重量部、トルエン152.4重量部、上記構造のケイ素原子結合水素原子を有するオルガノポリシロキサン化合物0.46重量部、反応抑制剤として3−メチル−1−ブチン−3−オール0.24重量部と白金量が40ppmとなるような塩化白金酸の2−エチルヘキサノール変性溶液とから、シリコーン粘着剤組成物−IVを調製した。
上記シリコーン粘着剤組成物I〜IVを、厚さ100μmの無延伸ポリエチレン(LDP)上に塗布し、100℃で10分間加熱して15μmのシリコーン粘着層を形成させることにより、シリコーン粘着フィルムI〜IVを作製した。
前記で得られたシリコーン粘着フィルムの粘着層面と接着フィルムの接着剤層面を表2に示す組み合わせで、荷重2kg、巾300mmロールにより圧着し、ダイシング・ダイボンドシートI〜XIIIを作製した。
25μm厚の硬化接着フィルムの表面状態(分散性不良による凹凸の有無)を観察した。凹凸の無いものをA、凹凸の有るものをBとした。
前記接着フィルムを175℃で2時間熱処理し、乾燥及び硬化させた。20mm×5mm×50μmのフィルムを切り出して、ガラス転移点を測定した。測定には熱機械測定装置、TMA−2000(アルバック理工製)を用い、引張りモードで、チャック間距離15mm、測定温度25〜300℃、昇温速度5℃/分、測定荷重3gの条件でガラス転移点及び線膨張係数を測定した。
前記で得られた接着フィルムを175℃で2時間加熱して硬化させた。40mm×10mm×50μmのフィルムを切り出し、動的粘弾性測定装置を用い、引張りモードで、チャック間距離10mm、測定温度25℃、測定周波数1Hzの条件でヤング率を測定した。
前記で得られた接着フィルムを175℃で2時間加熱硬化させた。150mm×150mm×50μmのフィルムを切り出し、85℃/85%RHの条件下で168時間保持した後、重量変化により吸湿率を測定した。
各未硬化の厚さ50μmの接着層約20枚を80℃で熱ラミネートし、厚み約1mmの試験片を作成した。この試料を用いてパラレルプレート型粘弾性測定装置(レオロジ社製、MR−300)で、フィルム状の接着剤組成物の溶融粘度を測定した。
ダイシング・ダイボンドシートを450μmの6インチのシリコンウエハーに熱圧着し、次いで2mm×2mmにダイシングした。裏面に接着層が付いたシリコンチップを取りだして、10mm×10mmのレジストAUS303((株)ユニテクノ社製)が塗布硬化されたBT基板とシリコン基板に、夫々、150℃、0.1MPaの条件で2秒熱圧着し、固定した。得られた試験体を175℃で2時間加熱して接着層を硬化させ、接着用試験片を作製した。ボンドテスター(DAGE社製、4000PXY)により、240℃におけるせん断接着力を測定した。
前記の接着用試験片を85℃/60%RHの条件下で168時間保持し、次いで260℃のリフロー炉に3回通した後、前記同様に240℃のせん断接着力を測定した。
前記で得られたダイシング・ダイボンドシートを巾25mmのテープ状に切り出し、接着剤層側の基材フィルムを剥離して、接着剤層側をガラス板(厚さ2.0mm、巾50mm)に80℃、0.01MPaの条件で10秒熱圧着した。この試験体を、25±2℃、50±5%RHの恒温恒湿下に24時間放置した後、粘着フィルムの端を接着剤層から剥離して180°に折り返し、300mm/分の速度で引き剥がしたときの剥離力を測定した。
前記で得られたダイシング・ダイボンドシートの接着剤層側の基材フィルムを剥離し、テクノビジョン社製のフィルム貼り付け装置(FM−114)で150μmの8インチウエハーに80℃で熱圧着した(ロール圧、2kg)。これを10mm角のチップにダイシングし、NECマシナリー社製のダイボンダー装置(BESTEM−D02−TypeC)でチップ取り出しを行った。表2において、ダイシング時にチップが飛ばなかったものをA、飛んだものをBとし、又、チップの取り出しが問題なくできたものをA、取り出しができなかったものをBと表した。
前記で得られたダイシング・ダイボンドシートを幅25mm×長さ200mmに裁断し、これをウエハーの鏡面側に50〜80℃の温度で熱圧着した。次いで、粘着剤層を剥離し、ウエハー面からの接着剤層の剥離の有無を確認した。粘着剤層を剥離する際に、接着剤層も共に剥離されるシートは、ウェハーへの熱圧着性が悪いことを意味する。これは、表2にBで表した。粘着剤層を剥離する際に、接着剤層との界面から剥離されるシートは、チップを取り出す際に接着剤層がチップに付着された状態で取り出すことができるものであり、ダイシング・ダイボンドシートとして好適であることを意味する。これは、表2にAで表した。
ダイシング・ダイボンドシートを、150μmの8インチのシリコンウエハーに熱圧着し、次いでシリコンウエハーを8mm×8mmにダイシングした。250μmの樹脂基板(レジストAUS303が塗布硬化されたBT基板)上に、このシリコンチップをマップ状に、0.1MPa、150℃で、1秒間熱圧着し、次いで、樹脂基板上から600μmの厚さでモールド剤KMC2500VA−T1(信越化学工業社製)で樹脂封止(175℃、封止圧力6.9MPa、90秒間)した後、175℃、4時間で加熱硬化した。得られたパッケージを、超音波画像測定装置で観察して、ボイドの発生とチップ移動の有無を調べた。
前記で樹脂封止したチップを切り離したパッケージ合計20個を30℃/60%RHの条件下で192時間保持し、次いで260℃のリフロー炉に3回通した後、超音波画像測定装置でボイドと剥離の有無を観察した。
実施例
A1:RE−310S:液状エポキシ樹脂、日本化薬社製
A2:RE−600N:エポキシ樹脂、液化温度60℃、日本化薬社製
A3:EOCN−102S:エポキシ樹脂、軟化温度55〜77℃、日本化薬社製
ジシアンジアミド:ジャパンエポキシレジン社製
2PHZ:2−フェニル−4,5−ジヒドロキシメチルイミダゾール(四国化成社製)
D1:SE−2050:球状シリカ、アドマテックス社製、平均粒径0.5μm
D2:SE−1050:球状シリカ、アドマテックス社製、平均粒径0.1μm
E1:X−52−7030:シリコーンゴム複合パウダー、平均粒径0.7μm、信越化学工業社製
E2:KMP−600:シリコーンゴム複合パウダー、平均粒径5μm、信越化学工業社製参考例
エピコートM1003:エポキシ樹脂、軟化温度89℃、ジャパンエポキシレジン社製
KMP−597:シリコーンゴムパウダー、平均粒径5μm、信越化学工業社製
比較例2は、球状シリカを含み、比較例1に比べて溶融粘度は高いが、ダイボンドシート(比較例4)では、チップ移動が見られ、また、ヤング率が高かった。
参考例1は、軟化点の高いエポキシ樹脂を含む組成物である。これは、熱圧着することができず(参考例3)、接着性等の評価を行うことができなかった。
参考例2は、表面上にポリオルガノシルセスキオキサン樹脂微小体を有しないシリコーンゴム微粒子を含む組成物である。該粉末は、樹脂系への分散性が悪く、接着フィルムとして使用できなかった。
参考例5及び6は、本発明の接着剤からなる層を含む。しかし、粘着力が、本発明の範囲外であるため、チップが飛んだり、チップ取出しに問題があるものであった。
これに対して、実施例の接着剤及び該接着剤の層を含むダイボンドフィルムは、いずれの性能においても、良好であった。
2 粘着層
3 接着剤層
4 接着フィルム基材
5 シリコンウエハー
Claims (6)
- (A)ポリイミドシリコーン樹脂 5〜60重量%
(B)軟化温度が80℃以下のエポキシ樹脂 5〜60重量%
(C)イミダゾール化合物とジシアンジアミドから選ばれる少なくとも1のエポキシ樹脂硬化触媒 0.001〜20重量%
(D)平均粒径0.1〜10ミクロンの球状シリカ 20〜70重量%
(E)平均粒径0.1〜10ミクロンを有し、表面上にポリオルガノシルセスキオキサン樹脂微小体を備えるシリコーンゴム球状微粒子 5〜30重量%
を含む接着剤組成物、但し、各重量%は組成物総重量に基づく。 - パラレルプレート型粘弾性測定装置により測定された最低溶融粘度が1000Pa・s以上である請求項1記載の接着剤組成物。
- (A)ポリイミドシリコーン樹脂が、フェノール性の水酸基を有する、請求項1または2記載の接着剤組成物。
- (A)ポリイミドシリコーン樹脂が、テトラカルボン酸二無水物と、下記式(1)で表される構造のジアミン化合物とを反応させて得られるポリイミド樹脂を含む、請求項1〜3のいずれか1項記載の接着剤組成物。
(式中、R3は炭素原子数3〜9の二価の有機基、R4は互いに独立に炭素原子数1〜8の非置換又は置換の一価炭化水素基であり、mは1〜200の整数である。) - 基材上に形成されたシリコーン粘着剤層の上に、請求項1〜4のいずれか1項記載の接着剤からなる層が積層されてなり、該シリコーン粘着剤層と該接着層との間の粘着力が、0.05〜1.0N/25mmであるダイシング・ダイボンド用接着シート。
- シリコーン粘着剤層が、白金触媒による付加硬化型のシリコーン粘着剤からなるものである請求項5記載のダイシング・ダイボンド用接着シート。
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| DE200660006262 DE602006006262D1 (de) | 2005-10-20 | 2006-10-20 | Klebstoffzusammensetzung und Schicht mit einer Haftschicht von der Zusammensetzung. |
| EP20060076924 EP1777278B1 (en) | 2005-10-20 | 2006-10-20 | Adhesive composition and sheet having an adhesive layer of the composition |
| US11/583,699 US7488539B2 (en) | 2005-10-20 | 2006-10-20 | Adhesive composition and sheet having an adhesive layer of the composition |
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| JP4019254B2 (ja) | 2002-04-24 | 2007-12-12 | 信越化学工業株式会社 | 導電性樹脂組成物 |
| US6881786B2 (en) | 2002-05-20 | 2005-04-19 | Ppg Industries Ohio, Inc. | One-component, waterborne film-forming composition |
| JP3901615B2 (ja) * | 2002-08-21 | 2007-04-04 | 信越化学工業株式会社 | シリコーン接着剤及び接着フイルム |
| JP4344912B2 (ja) * | 2002-10-04 | 2009-10-14 | 信越化学工業株式会社 | シリコーン接着剤及びシリコーン接着フイルム |
| JP4219660B2 (ja) * | 2002-11-18 | 2009-02-04 | 信越化学工業株式会社 | ウエハダイシング・ダイボンドシート |
| JP4171898B2 (ja) * | 2003-04-25 | 2008-10-29 | 信越化学工業株式会社 | ダイシング・ダイボンド用接着テープ |
| JP4235808B2 (ja) * | 2003-09-19 | 2009-03-11 | 信越化学工業株式会社 | 接着剤組成物及び接着フィルム |
| JP4530125B2 (ja) * | 2003-10-17 | 2010-08-25 | 信越化学工業株式会社 | 接着剤組成物及び接着フイルム並びにダイシング・ダイボンド用接着テープ |
| TWI460249B (zh) * | 2006-02-16 | 2014-11-11 | Shinetsu Chemical Co | 黏合組成物、黏合膜及製造半導體元件的方法 |
-
2006
- 2006-10-17 JP JP2006282285A patent/JP5046366B2/ja not_active Expired - Fee Related
- 2006-10-20 US US11/583,699 patent/US7488539B2/en not_active Expired - Fee Related
- 2006-10-20 DE DE200660006262 patent/DE602006006262D1/de active Active
- 2006-10-20 EP EP20060076924 patent/EP1777278B1/en not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| DE602006006262D1 (de) | 2009-05-28 |
| EP1777278B1 (en) | 2009-04-15 |
| EP1777278A1 (en) | 2007-04-25 |
| US7488539B2 (en) | 2009-02-10 |
| US20070090299A1 (en) | 2007-04-26 |
| JP2007138149A (ja) | 2007-06-07 |
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