JP5098411B2 - 感光性樹脂組成物、並びにこれを用いた感光性フィルム及び感光性永久レジスト - Google Patents
感光性樹脂組成物、並びにこれを用いた感光性フィルム及び感光性永久レジスト Download PDFInfo
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- JP5098411B2 JP5098411B2 JP2007110774A JP2007110774A JP5098411B2 JP 5098411 B2 JP5098411 B2 JP 5098411B2 JP 2007110774 A JP2007110774 A JP 2007110774A JP 2007110774 A JP2007110774 A JP 2007110774A JP 5098411 B2 JP5098411 B2 JP 5098411B2
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- photosensitive resin
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- compound
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- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 4
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- 229920000877 Melamine resin Polymers 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 3
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Description
[感光性樹脂組成物]
まず、本実施形態の感光性樹脂組成物において特に特徴的な(c)成分であるポリウレタン化合物について説明する。ポリウレタン化合物は、2つ以上の水酸基及びエチレン性不飽和基を有するエポキシアクリレート化合物と、ジイソシアネート化合物と、カルボキシル基を有するジオール化合物と、を反応させて得られたポリウレタン化合物である。
ここで、式(1)中、R11はエポキシアクリレートの残基、R12はジイソシアネートの残基、R13は炭素数1〜5のアルキル基、R14は水素原子又はメチル基を示す。なお、残基とは、原料成分から結合に供された官能基を除いた部分の構造をいう。また、式中に複数ある基は、それぞれ同一でも異なっていてもよい。
A=10×Vf×56.1/(Wp×I)
(a)成分であるバインダーポリマーは、分子内にカルボキシル基を有するポリマーである。このバインダーポリマーの重量平均分子量(Mw)は、20000〜150000であると好ましく、30000〜120000であるとより好ましい。なお、重量平均分子量(Mw)は、ゲルパーミエーションクロマトグラフィー(GPC)により測定することができる(標準ポリスチレンによる換算)。
(b)成分である光重合性モノマーは、分子内に少なくとも一つ以上のエチレン性不飽和基を有する化合物である。このような光重合性モノマーとしては、例えば、ビスフェノールA系(メタ)アクリレート化合物;多価アルコールにα,β−不飽和カルボン酸を反応させて得られる化合物;グリシジル基含有化合物にα,β−不飽和カルボン酸を反応させて得られる化合物;分子内にウレタン結合を有する(メタ)アクリレート化合物等のウレタンモノマー又はウレタンオリゴマーが挙げられる。また、これら以外にも、ノニルフェノキシポリオキシエチレンアクリレート;γ−クロロ−β−ヒドロキシプロピル−β´−(メタ)アクリロイルオキシエチル−o−フタレート、β−ヒドロキシアルキル−β´−(メタ)アクリロイルオキシアルキル−o−フタレート等のフタル酸系化合物;(メタ)アクリル酸アルキルエステル、EO変性ノニルフェニル(メタ)アクリレート等が例示可能である。これらは単独で又は2種類以上を組み合わせて使用される。
(d)成分である光重合開始剤としては、例えば、ベンゾフェノン、N,N’−テトラアルキル−4,4´−ジアミノベンゾフェノン、2−ベンジル−2−ジメチルアミノ−1−(4−モルホリノフェニル)−ブタノン−1、2−メチル−1−[4−(メチルチオ)フェニル]−2−モルホリノ−プロパノン−1等の芳香族ケトン、4,4´−ビス(ジメチルアミノ)ベンゾフェノン(ミヘラーケトン)、4,4´−ビス(ジエチルアミノ)ベンゾフェノン、4−メトキシ−4´−ジメチルアミノベンゾフェノン、2−ベンジル−2−ジメチルアミノ−1−モルホリノフェノン)−ブタノン−1,2−エチルアントラキノン、フェナントレンキノン等の芳香族ケトン、ベンゾインメチルエーテル、ベンゾインエチルエーテル、ベンゾインフェニルエーテル等のベンゾインエーテル、メチルベンゾイン、エチルベンゾイン等のベンゾイン、ベンジルジメチルケタール等のベンジル誘導体、2−(o−クロロフェニル)−4,5−ジフェニルイミダゾール二量体、2−(o−クロロフェニル)−4,5−ジ(m−メトキシフェニル)イミダゾール二量体、2−(o−フルオロフェニル)−4,5−ジフェニルイミダゾール二量体、2−(o−メトキシフェニル)−4,5−ジフェニルイミダゾール二量体、2,4−ジ(p−メトキシフェニル)−5−フェニルイミダゾール二量体、2−(2,4−ジメトキシフェニル)−4,5−ジフェニルイミダゾール二量体等の2,4,5−トリアリールイミダゾール二量体、9−フェニルアクリジン、1,7−ビス(9,9´−アクリジニル)ヘプタン等のアクリジン誘導体、N−フェニルグリシン、N−フェニルグリシン誘導体、クマリン系化合物等などが挙げられる。これらは1種類を単独で又は2種類以上を組み合わせて用いることができる。
好適な実施形態の感光性樹脂組成物は、(e)ブロック型イソシアネートを更に含むことが好ましい。ブロック型イソシアネートは、常温では不活性であるが、加熱するとブロック剤が可逆的に解離してイソシアネート基を再生する化合物である。ブロック剤の解離温度は120〜200℃であると好ましい。
[感光性フィルム]
[レジストパターンの形成方法]
[酸変性ポリエステル樹脂の製造]
まず、攪拌機、還流冷却機、温度計及び窒素ガス導入管を備えたフラスコに、ビスフェノールA型エポキシ樹脂(東都化成(株)製、エポキシ当量479g/eq、商品名エポトートYD‐011)182.7質量部、プロピレングリコールモノメチルエーテルアセテート64.0質量部及びトルエン30.0質量部を仕込み、窒素ガスを吹き込みながら、130℃に加熱した状態で攪拌することにより、エポキシ樹脂に含まれる水分の還流脱水を行った。
[感光性フィルムの作製]
まず、表1に示す成分(1)〜成分(5)及びその他の成分を表中に示す固形分の配合比(質量基準)で混合することにより、感光性樹脂組成物の溶液を得た。なお、表中、成分(1)における樹脂(1)は、上述した製造例1で得られた酸変性エポキシ樹脂であり、樹脂(2)は、カルボキシル基含有アクリルポリマであって、メタクリル酸、メタクリル酸メチル、アクリル酸ブチルの共重合体(メタクリル酸:メタクリル酸メチル:アクリル酸ブチル=17重量%:62重量%:21重量%)で重量平均分子量100000、酸価110mgKOH/gのものである。これらの成分(1)は、上述した実施形態の(a)成分に該当する。
[特性評価]
感光性フィルムに対し、露光を行わずに、感光性樹脂組成物層上のポリエチレンテレフタレートを剥離した。この塗膜表面に指を軽く押し付け、指に対する張り付き程度を以下の基準で評価した。すなわち、指に対する張り付きが認められない、または、ほとんど認められないものは「○」とし、指に対する張り付きが認められるものは「×」とした。
まず、各感光性フィルムを用いて、以下のようにして評価用基板を作製した。すなわち、まず、12μm厚の銅箔をガラスエポキシ基材に積層したプリント配線板用基板(E−679、日立化成工業(株)製、商品名)の銅表面を砥粒ブラシで研磨し、水洗した後、乾燥した。このプリント配線板用基板上に連プレス式真空ラミネータ(名機製作所製、商品名MVLP−500)を用いて、プレス熱板温度70℃、真空引き時間20秒、ラミネートプレス時間30秒、気圧4kPa以下、圧着圧力0.4MPaの条件の下、感光性フィルムのポリエチレンフィルムを剥離して積層し、評価用積層体を得た。
上記と同様にして作製したソルダーレジストを有する評価用基板に対し、−55℃の大気中に15分間晒した後、180℃/分の昇温速度で昇温し、次いで、125℃の大気中に15分間晒した後、180℃/分の降温速度で降温する熱サイクルを1000回繰り返す試験を行った。
まず、12μm厚の銅箔をガラスエポキシ基材に積層したプリント配線板用基板(日立化成工業(株)製、商品名E−679)の銅表面を、エッチングによりライン/スペースが50μm/50μmのくし型電極に加工した。これを、評価用配線板とした。
上記「はんだ耐熱性」試験と同様にして、ソルダーレジストを形成した評価用基板を準備し、これに、市販の無電解ニッケル/金めっき液を用いて、ニッケルめっき厚5μm、金めっき厚0.1μmとなるようにめっきを行った。そして、ソルダーレジストの外観を観察し、次の基準で評価した。すなわち、ソルダーレジストに白化が認められないものは「○」とし、認められるものは「×」とした。
各実施例又は比較例の感光性フィルムを、室温(23℃)で20日間放置した後、これに、上記「はんだ耐熱性」試験と同様の露光、現像、UV照射、加熱を経てパターン形成を行った。そして、このようにして形成されたパターンを、実体顕微鏡で観察し、以下の基準にて判定した。表2において、○は、未露光部分に樹脂残りがないもの、×は未露光部分に樹脂残りがあるものを示す。
Claims (4)
- (a)カルボキシル基を有するバインダーポリマー、(b)少なくとも一つ以上のエチレン性不飽和基を有する光重合性モノマー、(c)ポリウレタン化合物、(d)光重合開始剤、及び、(e)ブロック型イソシアネートを含有し、
前記(a)バインダーポリマーが、(メタ)アクリル酸及び(メタ)アクリル酸アルキルエステルを共重合成分として得られるビニル系共重合化合物を含有し、
前記(c)ポリウレタン化合物が、エチレン性不飽和基及び2つ以上の水酸基を有するエポキシアクリレート化合物と、ジイソシアネート化合物と、カルボキシル基を有するジオール化合物と、を反応させて得られたものである、感光性樹脂組成物。 - 支持体と、該支持体上に形成された請求項1記載の感光性樹脂組成物からなる層と、を備える感光性フィルム。
- 基板上に、請求項1記載の感光性樹脂組成物からなる感光性樹脂組成物層を形成する工程と、
前記感光性樹脂組成物層に活性光線を照射し、所定領域を光硬化させる工程と、
前記感光性樹脂組成物層における未硬化部分を除去してレジストパターンを形成する工程と、
を含むレジストパターンの形成方法。 - プリント配線板用の基板上に塗布された請求項1記載の感光性樹脂組成物の光硬化物からなる、感光性永久レジスト。
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| JP5050815B2 (ja) | 2007-11-30 | 2012-10-17 | アイシン・エィ・ダブリュ株式会社 | 施設情報出力装置、施設情報出力方法、施設情報出力プログラム |
| JP5319132B2 (ja) * | 2008-02-06 | 2013-10-16 | 太陽ホールディングス株式会社 | 光硬化性・熱硬化性樹脂組成物及びその硬化物 |
| JP5417716B2 (ja) * | 2008-02-20 | 2014-02-19 | 日立化成株式会社 | 感光性樹脂組成物、並びにこれを用いた感光性フィルム、レジストパターンの形成方法及び永久レジスト |
| WO2009119821A1 (ja) * | 2008-03-28 | 2009-10-01 | 太陽インキ製造株式会社 | 硬化性樹脂組成物とその硬化物、およびプリント配線板 |
| JP2009251585A (ja) * | 2008-04-11 | 2009-10-29 | Hitachi Chem Co Ltd | 感光性樹脂組成物及びそれを用いた感光性エレメント |
| JP5218828B2 (ja) * | 2008-05-15 | 2013-06-26 | 日立化成株式会社 | 感光性樹脂組成物、並びにこれを用いた感光性フィルム、レジストパターンの形成方法及び永久レジスト |
| JP5224119B2 (ja) * | 2008-11-18 | 2013-07-03 | 日立化成株式会社 | 感光性樹脂組成物、並びにこれを用いた感光性フィルム及び永久マスクレジスト |
| JP5370727B2 (ja) * | 2008-11-28 | 2013-12-18 | 日立化成株式会社 | 感光性樹脂組成物、これを用いた感光性フィルム及び永久レジスト |
| JP5472692B2 (ja) * | 2009-07-06 | 2014-04-16 | 日立化成株式会社 | アルカリ現像可能な感光性樹脂組成物及びそれを用いた感光性フィルム |
| JP5472693B2 (ja) * | 2009-07-06 | 2014-04-16 | 日立化成株式会社 | 感光性樹脂組成物及びそれを用いた感光性フィルム |
| JP2011060892A (ja) * | 2009-09-08 | 2011-03-24 | Renesas Electronics Corp | 電子装置、電子装置の製造方法 |
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