JP4254177B2 - Positive photosensitive resin composition and semiconductor device - Google Patents

Positive photosensitive resin composition and semiconductor device Download PDF

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Publication number
JP4254177B2
JP4254177B2 JP2002265237A JP2002265237A JP4254177B2 JP 4254177 B2 JP4254177 B2 JP 4254177B2 JP 2002265237 A JP2002265237 A JP 2002265237A JP 2002265237 A JP2002265237 A JP 2002265237A JP 4254177 B2 JP4254177 B2 JP 4254177B2
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group
resin composition
photosensitive resin
positive photosensitive
general formula
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JP2004132996A (en
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裕明 真壁
敏夫 番場
孝 平野
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Sumitomo Bakelite Co Ltd
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Sumitomo Bakelite Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、高感度かつ高解像度の特性を有するポジ型感光性樹脂組成物及び半導体装置に関するものである。
【0002】
【従来の技術】
従来、半導体素子の表面保護膜、層間絶縁膜には、耐熱性に優れ又卓越した電気特性、機械特性等を有するポリイミド樹脂が用いられているが、近年半導体素子の高集積化、大型化、半導体装置の薄型化、小型化、半田リフローによる表面実装への移行等により耐熱サイクル性、耐熱ショック性等の著しい向上の要求があり、更に高性能の樹脂が必要とされるようになってきた。
【0003】
一方、ポリイミド樹脂自身に感光性を付与する技術が注目を集めてきており、例えば下記式(6)に示されるネガ型感光性ポリイミド樹脂が挙げられる。
【化6】

Figure 0004254177
【0004】
これを用いるとパターン作成工程の一部が簡略化でき、工程短縮及び歩留まり向上の効果はあるが、現像の際にN−メチル−2−ピロリドン等の溶剤が必要となるため、安全性、取扱い性に問題がある。そこで最近、アルカリ水溶液で現像ができるポジ型感光性樹脂組成物が開発され、ポリイミド樹脂の前駆体であるポリアミド樹脂と感光材であるジアゾキノン化合物より構成されるポジ型感光性樹脂組成物が開示されている(例えば、特許文献1、特許文献2、特許文献3、特許文献4参照。)。これらのベース樹脂にはカルボキシル基、又はカルボキシル基が適当な保護基でブロックされた基が含まれている。
【0005】
一般的に、g線、i線等の紫外線を光源として用いる半導体用レジストに代表されるポジ型感光性樹脂組成物は、アルカリ水溶液に可溶なフェノール性水酸基を含むベース樹脂と1,2−ベンゾキノンジアジド或いは1,2−ナフトキノンジアジド構造を有する感光性ジアゾキノン化合物から構成されている。このポジ型感光性樹脂組成物の現像メカニズムは以下のようになっている。未露光部のジアゾキノン化合物は現像液であるアルカリ水溶液に不溶であり、ベース樹脂中のフェノール性水酸基と相互作用することで溶解阻止能を発揮し、これに対し耐性を持つようになる。一方、露光することによりジアゾキノン化合物は化学変化を起こし、アルカリ水溶液に可溶となり、ベース樹脂の溶解性を促進させる。この露光部と未露光部との溶解性の差を利用し、露光部を溶解除去することにより未露光部のみの塗膜パターンの作成が可能となるものである。
【0006】
従って、上記各公報に記載のポジ型感光性樹脂組成物のベース樹脂中にあるカルボキシル基は、ジアゾキノン化合物と相互作用することが出来ない、更にフェノール性水酸基よりもアルカリ水溶液に対する溶解性が非常に高いという理由により、未露光部の溶解阻止能が形成されず、目的とする膜厚が得られないばかりかパターンの形成自体が困難になる問題がある。又カルボキシル基が適当な保護基でブロックされた基の場合、未露光部のアルカリ水溶液に対する耐性は十分あるが、露光部の溶解性が劣るために現像後に樹脂の残り(スカム)が見られるという問題がある。
このようなことから、フェノール性水酸基を分岐させたポリアミド樹脂とジアゾキノン化合物より構成されるポジ型感光性樹脂組成物が開示されている(例えば、特許文献5参照。)。しかし、熱で硬化させた際にポリイミドのように脱水縮合して閉環することなく水酸基が残ってしまうために耐湿信頼性が低下するという問題がある。
【0007】
又これらの感光性樹脂組成物を使用する場合、特に重要となるのは感光性樹脂組成物の感度である。低感度であると、露光時間が長くなりスループットが低下する。そこで感光性樹脂組成物の感度を向上させようとして、例えばベース樹脂の分子量を小さくすると、現像時に未露光部の膜減りが大きくなるために、必要とされる膜厚が得られなかったり、パターン形状が崩れるといった問題が生じる。
上記のような、カルボキシル基を有するベース樹脂を用いた感光性樹脂組成物の場合、ベース樹脂の溶解性が高いために結果として高い感度を示すが、未露光部の溶解阻止能が殆どないために目的とする膜厚が得られないという問題を生じる。そのため、例えば現像時間を短縮するといった方法を採る場合、逆に露光部が溶解する時間が十分にないため感度が低下するという問題が生じる。又カルボキシル基が適当な保護基でブロックされた基を有するベース樹脂を用いた感光性樹脂組成物の場合、樹脂全体のアルカリ水溶液に対する溶解性が劣るために感度が極端に低下するという問題が起きる。
【0008】
【特許文献1】
特開平5−204156号公報(第2〜9頁)
【特許文献2】
特開平6−258836号公報(第2〜5頁)
【特許文献3】
特開平10−186658号公報(第2〜4頁)
【特許文献4】
特開平10−307394号公報(第2〜7頁)
【特許文献5】
特開平3−247655号公報(第1〜4頁)
【0009】
【発明が解決しようとする課題】
本発明は、従来の特性を維持しながら、高感度かつ高解像度である特性を有するポジ型感光性樹脂組成物及び半導体装置を提供するものである。
【0010】
【課題を解決するための手段】
本発明は、一般式(1)で示されるポリアミド樹脂(A)100重量部、感光性ジアゾキノン化合物(B)1〜50重量部及び一般式(2)で示されるフェノール化合物(C)1〜30重量部からなるポジ型感光性樹脂組成物である。
【0011】
【化7】
Figure 0004254177
【0012】
【化8】
Figure 0004254177
【0013】
更に好ましい形態としては、一般式(1)で示されるポリアミド樹脂中のXが、式(3)の群より選ばれてなり、Yが式(4)の群より選ばれてなるポジ型感光性樹脂組成物である。
【0014】
【化9】
Figure 0004254177
【0015】
【化10】
Figure 0004254177
【0016】
一般式(1)で示されるポリアミド樹脂が、酸無水物によって末端封止されているものであって、該酸無水物に起因する基が、式(5)の群より選ばれてなるポジ型感光性樹脂組成物である。
【0017】
【化11】
Figure 0004254177
【0018】
又感光性ジアゾキノン化合物が、フェノール化合物と1,2−ナフトキノン−2−ジアジド−5−スルホン酸又は1,2−ナフトキノン−2−ジアジド−4−スルホン酸とのエステル化合物であり、一般式(2)で示されるフェノール化合物中の各水酸基同士が、隣接していないポジ型感光性樹脂組成物である。
又上記のポジ型感光性樹脂組成物を用いて製作された半導体装置であり、上記のポジ型感光性樹脂組成物を加熱脱水閉環後の膜厚が、0.1〜30μmになるように半導体素子上に塗布し、プリベーク、露光、現像、加熱して得られる半導体装置である。
【0019】
【発明の実施の形態】
一般式(1)で示される構造を含むポリアミド樹脂中のXは、2〜4価の環状化合物基を表し、R1は、水酸基、O−R3で、mは0〜2の整数、これらは同一でも異なっていても良い。Yは、2〜6価の環状化合物基を表し、R2は水酸基、カルボキシル基、O−R3、COO−R3で、nは0〜4の整数、これらは同一でも異なっていても良い。ここでR3は炭素数1〜15の有機基である。但し、R1として水酸基がない場合は、R2は少なくとも1つはカルボキシル基でなければならない。又R2としてカルボキシル基がない場合は、R1は少なくとも1つは水酸基でなければならない。
一般式(1)のポリアミド樹脂は、例えばXの構造を有するジアミン或いはビス(アミノフェノール)、2,4−ジアミノフェノール等から選ばれる化合物、必要により配合されるZの構造を有するシリコーンジアミンとYの構造を有するテトラカルボン酸無水物、トリメリット酸無水物、ジカルボン酸或いはジカルボン酸ジクロリド、ジカルボン酸誘導体、ヒドロキシジカルボン酸、ヒドロキシジカルボン酸誘導体等から選ばれる化合物とを反応して得られるものである。なお、ジカルボン酸の場合には反応収率等を高めるため、1−ヒドロキシ−1,2,3−ベンゾトリアゾール等を予め反応させた活性エステル型のジカルボン酸誘導体を用いてもよい。一般式(1)で示される構造を含むポリアミド樹脂において、Xの置換基としてのO−R3、Yの置換基としてのO−R3、COO−R3は、水酸基、カルボキシル基のアルカリ水溶液に対する溶解性を調節する目的で、炭素数1〜15の有機基で保護された基であり、必要により水酸基、カルボキシル基を保護しても良い。R3の例としては、ホルミル基、メチル基、エチル基、プロピル基、イソプロピル基、ターシャリーブチル基、ターシャリーブトキシカルボニル基、フェニル基、ベンジル基、テトラヒドロフラニル基、テトラヒドロピラニル基等が挙げられる。このポリアミド樹脂を約300〜400℃で加熱すると脱水閉環し、ポリイミド、又はポリベンゾオキサゾール或いは両者の共重合という形で耐熱性樹脂が得られる。
【0020】
本発明の一般式(1)で示される構造を含むポリアミド樹脂のXは、例えば、
【化12】
Figure 0004254177
等であるがこれらに限定されるものではない。これら中で特に好ましいものとしては、式(3)の群より選ばれるものであり、又2種以上用いても良い。
【0021】
又一般式(1)で示される構造を含むポリアミド樹脂のYは、例えば、
【化13】
Figure 0004254177
等であるがこれらに限定されるものではない。これらの中で特に好ましいものとしては、式(4)の群より選ばれるものであり、又2種以上用いても良い。
【0022】
又本発明のポジ型感光性樹脂組成物は、保存性という観点から、Yの構造を有するテトラカルボン酸無水物、トリメリット酸無水物、ジカルボン酸或いはジカルボン酸ジクロリド又はジカルボン酸誘導体、ヒドロキシジカルボン酸、ヒドロキシジカルボン酸誘導体等から選ばれる化合物とXの構造を有するジアミン或いはビス(アミノフェノール)、2,4−ジアミノフェノール等から選ばれる化合物、必要により配合されるZの構造を有するシリコーンジアミンを反応させて得られた一般式(1)で示される構造を含むポリアミド樹脂を合成した後、該ポリアミド樹脂中に含まれる末端のアミノ基をアルケニル基又はアルキニル基を少なくとも1個有する脂肪族基又は環式化合物基を含む酸無水物を用いてアミドとしてキャップすることが好ましい。
【0023】
アルケニル基又はアルキニル基を少なくとも1個有する脂肪族基又は環式化合物基を含む酸無水物に起因する基として、例えば、
【化14】
Figure 0004254177
等が挙げられるが、これらに限定されるものではない。
これらの中で特に好ましいものとしては、式(5)の群より選ばれるものであり、又2種以上用いても良い。
【0024】
更に、必要によって用いる一般式(1)で示される構造を含むポリアミド樹脂のZは、例えば
【化15】
Figure 0004254177
等であるがこれらに限定されるものではなく、又2種以上用いても良い。
【0025】
一般式(1)で示される構造を含むポリアミド樹脂のZは、例えば、シリコンウェハーのような基板に対して、特に優れた密着性が必要な場合に用いるが、その使用割合bは最大40モル%までである。40モル%を越えると樹脂の溶解性が極めて低下し、現像残り(スカム)が発生し、パターン加工ができなくなるので好ましくない。
【0026】
本発明のポジ型感光性樹脂組成物においては、更に一般式(2)で示されるフェノール化合物を含有させることが重要である。フェノール化合物をポジ型レジスト組成物に添加する技術としては、例えば特開平3−200251号公報、特開平3−200252号公報、特開平3−200253号公報、特開平3−200254号公報、特開平4−1650号公報、特開平4−11260号公報、特開平4−12356号公報、特開平4−12357号公報等に開示されている。しかし、これらに示されているようなフェノール化合物は、本発明におけるポリアミド樹脂をベース樹脂としたポジ型感光性樹脂組成物に用いた場合、感度向上の効果は小さい。しかし本発明における一般式(2)で示されるフェノール化合物を用いた場合、露光部における溶解速度が速くなり感度が向上する。又分子量を小さくして感度を向上した場合に見られるような未露光部の膜減りも非常に小さい。
【0027】
一般式(2)に示されるフェノール化合物としては、下記のものを挙げることができるがこれらに限定されない。
【化16】
Figure 0004254177
【0028】
【化17】
Figure 0004254177
【0029】
本発明のポジ型感光性樹脂組成物は、感度向上を目的として必要により他のフェノール化合物を添加することができる。例えば下記のものが挙げられるが、これらに限定されるものではない。
【化18】
Figure 0004254177
【0030】
【化19】
Figure 0004254177
【0031】
【化20】
Figure 0004254177
【0032】
【化21】
Figure 0004254177
【0033】
一般式(2)で示されるフェノール化合物(C)の配合量は、一般式(1)で示されるポリアミド樹脂100重量部に対して1〜30重量部である。1重量部未満だと現像時における感度が低下し、30重量部を越えると現像時に著しい残膜率の低下が生じたり、冷凍保存中において析出が起こり実用性に欠ける。
【0034】
本発明で用いる感光性ジアゾキノン化合物(B)は、1, 2−ベンゾキノンジアジド或いは1,2−ナフトキノンジアジド構造を有する化合物であり、米国特許明細書第2,772,975号、第2,797,213号、第3,669,658号により公知の物質である。例えば下記のものが挙げられる。
【0035】
【化22】
Figure 0004254177
【0036】
【化23】
Figure 0004254177
【0037】
これらの内で、特に好ましいのはフェノール化合物と1,2−ナフトキノン−2−ジアジド−5−スルホン酸又は1,2−ナフトキノン−2−ジアジド−4−スルホン酸とのエステル化合物である。用いるフェノール化合物としては、例えば下記のものが挙げられるが、これらに限定されるものではない。又これらは単独で用いても混合して用いてもよい。
【0038】
【化24】
Figure 0004254177
【0039】
【化25】
Figure 0004254177
【0040】
【化26】
Figure 0004254177
【0041】
本発明で用いる感光性ジアゾキノン化合物(B)の配合量は、一般式(1)で示されるポリアミド樹脂100重量部に対して1〜50重量部である。1重量部未満だとポリアミド樹脂のパターニング性が不良となり、50重量部を越えると感度が大幅に低下する。
【0042】
本発明のポジ型感光性樹脂組成物には、必要により感光特性を高めるためにジヒドロピリジン誘導体を添加してもよい。ジヒドロピリジン誘導体としては、例えば2,6−ジメチル−3,5−ジアセチル−4−(2′−ニトロフェニル)−1,4−ジヒドロピリジン、4−(2′−ニトロフェニル)−2,6−ジメチル−3,5−ジカルボエトキシ−1,4−ジヒドロピリジン、4−(2′,4′−ジニトロフェニル)−2,6−ジメチル−3,5−ジカルボメトキシ−1,4−ジヒドロピリジン等を挙げることができる。
【0043】
本発明におけるポジ型感光性樹脂組成物には、必要によりレベリング剤、シランカップリング剤等の添加剤を配合することができる。
本発明においては、これらの成分を溶剤に溶解し、ワニス状にして使用する。溶剤としては、N−メチル−2−ピロリドン、γ−ブチロラクトン、N,N−ジメチルアセトアミド、ジメチルスルホキシド、ジエチレングリコールジメチルエーテル、ジエチレングリコールジエチルエーテル、ジエチレングリコールジブチルエーテル、プロピレングリコールモノメチルエーテル、ジプロピレングリコールモノメチルエーテル、プロピレングリコールモノメチルエーテルアセテート、乳酸メチル、乳酸エチル、乳酸ブチル、メチル−1,3−ブチレングリコールアセテート、1,3−ブチレングリコール−3−モノメチルエーテル、ピルビン酸メチル、ピルビン酸エチル、メチル−3−メトキシプロピオネート等が挙げられ、単独でも混合して用いてもよい。
【0044】
本発明のポジ型感光性樹脂組成物は、まず該樹脂組成物を適当な支持体、例えばシリコンウェハー、セラミック基板、アルミ基板等に塗布する。塗布量は、半導体装置の場合、硬化後の最終膜厚が0.1〜30μmになるように塗布する。膜厚が0.1μm未満だと半導体素子の保護表面膜としての機能を十分に発揮することが困難となり、30μmを越えると、微細な加工パターンを得ることが困難となる。塗布方法としては、スピンナーを用いた回転塗布、スプレーコーターを用いた噴霧塗布、浸漬、印刷、ロールコーティング等がある。次に、60〜130℃でプリベークして塗膜を乾燥後、所望のパターン形状に化学線を照射する。化学線としては、X線、電子線、紫外線、可視光線等が使用できるが、200〜500nmの波長のものが好ましい。
【0045】
次に照射部を現像液で溶解除去することによりレリーフパターンを得る。現像液としては、水酸化ナトリウム、水酸化カリウム、炭酸ナトリウム、ケイ酸ナトリウム、メタケイ酸ナトリウム、アンモニア水等の無機アルカリ類、エチルアミン、n−プロピルアミン等の第1アミン類、ジエチルアミン、ジ−n−プロピルアミン等の第2アミン類、トリエチルアミン、メチルジエチルアミン等の第3アミン類、ジメチルエタノールアミン、トリエタノールアミン等のアルコールアミン類、テトラメチルアンモニウムヒドロキシド、テトラエチルアンモニウムヒドロキシド等の第4級アンモニウム塩等のアルカリ類の水溶液、及びこれにメタノール、エタノールのごときアルコール類等の水溶性有機溶媒や界面活性剤を適当量添加した水溶液を好適に使用することができる。現像方法としては、スプレー、パドル、浸漬、超音波等の方式が可能である。
【0046】
次に、現像によって形成したレリーフパターンをリンスする。リンス液としては、蒸留水を使用する。次に加熱処理を行い、イミド環、オキサゾール環を形成し、耐熱性に富む最終パターンを得る。
本発明によるポジ型感光性樹脂組成物は、半導体用途のみならず、多層回路の層間絶縁やフレキシブル銅張板のカバーコート、ソルダーレジスト膜や液晶配向膜等としても有用である。
【0047】
【実施例】
以下、実施例により本発明を具体的に説明する。
<実施例1>
<ポリアミド樹脂の合成>
4,4’―オキシジフタル酸無水物17.1g(0.055モル)と2−メチル−2−プロパノール8.15g(0.110モル)とピリジン10.9g(0.138モル)とを温度計、攪拌機、原料投入口、乾燥窒素ガス導入管を備えた4つ口のセパラブルフラスコに入れ、N−メチル−2−ピロリドン150gを加えて溶解させた。この反応溶液に1−ヒドロキシ−1,2,3−ベンゾトリアゾール14.9g(0.110モル)をN−メチル−2−ピロリドン30gと共に滴下した後、ジシクロヘキシルカルボジイミド22.7g(0.110モル)をN−メチル−2−ピロリドン50gと共に滴下し、室温で一晩反応させた。その後、この反応溶液にジフェニルエーテル−4,4’−ジカルボン酸1.0モルと1−ヒドロキシ−1,2,3−ベンゾトリアゾール2モルとを反応させて得られたジカルボン酸誘導体(活性エステル)27.1g(0.055モル)とヘキサフルオロ−2,2−ビス(3−アミノ−4−ヒドロキシフェニル)プロパン44.8g(0.122モル)をN−メチル−2−ピロリドン70gと共に添加し、室温で2時間攪拌した。その後オイルバスを用いて75℃にて12時間反応させた。
【0048】
次にN−メチル−2−ピロリドン40gに溶解させた5−ノルボルネン−2,3−ジカルボン酸無水物8.0g(0.049モル)を加え、更に12時間攪拌して反応を終了した。反応混合物を濾過した後、反応混合物を水/メタノール=3/1(体積比)の溶液に投入、沈殿物を濾集し水で充分洗浄した後、真空下で乾燥し、一般式(1)で示され、Xが下記式X−1、Yが下記式Y−1及びY−2で、a=100、b=0からなるポリアミド樹脂(A−1)を合成した。
【0049】
<ポジ型感光性樹脂組成物の作製>
合成したポリアミド樹脂(A−1)100g、下記式(Q−1)の構造を有する感光性ジアゾキノン化合物21g、下記式(C−1)の構造を有するフェノール化合物12gをN−メチル−2−ピロリドン200gに溶解した後、0.2μmのテフロン(R)フィルターで濾過しポジ型感光性樹脂組成物を得た。
【0050】
<特性評価>
このポジ型感光性樹脂組成物をシリコンウェハー上にスピンコーターを用いて塗布した後、ホットプレートにて115℃で5分プリベークし、膜厚約7μmの塗膜を得た。この塗膜に凸版印刷(株)製・マスク(テストチャートNo.1:幅0.88〜50μmの残しパターン及び抜きパターンが描かれている)を通して、i線ステッパー((株)ニコン製・4425i)を用いて、露光量を変化させて照射した。次に1.40%のテトラメチルアンモニウムヒドロキシド水溶液に45秒間2回浸漬することによって露光部を溶解除去した後、純水で10秒間リンスした。その結果、露光量230mJ/cm2で照射した部分よりパターンが成形されていることが確認できた。(感度は230mJ/cm2)。解像度は3μmと非常に高い値を示した。
【0051】
<実施例2>
テレフタル酸0.9モルとイソフタル酸0.1モルと1−ヒドロキシ−1,2,3−ベンゾトリアゾール2モルとを反応させて得られたジカルボン酸誘導体(活性エステル)352.4g(0.88モル)とヘキサフルオロ−2,2−ビス(3−アミノ−4−ヒドロキシフェニル)プロパン366.3g(1.0モル)とを温度計、攪拌機、原料投入口、乾燥窒素ガス導入管を備えた4つ口のセパラブルフラスコに入れ、N−メチル−2−ピロリドン3000gを加えて溶解させた。その後オイルバスを用いて75℃にて12時間反応させた。次にN−メチル−2−ピロリドン500gに溶解させたY−4の混合物で、5−ノルボルネン−2,3−ジカルボン酸無水物32.8g(0.2モル)を加え、更に12時間攪拌して反応を終了した。反応混合物を濾過した後、反応混合物を水/メタノール=3/1(体積比)の溶液に投入、沈殿物を濾集し水で充分洗浄した後、真空下で乾燥し、一般式(1)で示され、Xが下記式X−1、Yが下記式Y−3及びY−4の混合物で、a=100、b=0からなる目的のポリアミド樹脂(A−2)を合成した。更に感光性ジアゾキノン化合物(Q−1)とフェノール化合物(C−1)の添加量をそれぞれ表1の様に変えた他は実施例1と同様の評価を行った。
【0052】
<実施例3>
実施例2における感光性ジアゾキノン化合物(Q−1)とフェノール化合物(C−1)の添加量を表1の様に変えた他は実施例2と同様の評価を行った。
<実施例4>
実施例2における感光性ジアゾキノン化合物(Q−1)を(Q−2)に替え、フェノール化合物(C−1)を(C−2)に替え、更にそれぞれの添加量を表1の様に変えた他は実施例2と同様の評価を行った。
【0053】
<実施例5>
実施例2におけるポリアミド樹脂の合成において、テレフタル酸0.9モルとイソフタル酸0.1モルの替わりに、ジフェニルエーテル−4,4’−ジカルボン酸1.0モルを用い、これと1−ヒドロキシ−1,2,3−ベンゾトリアゾール2.0モルとを反応させて得られたジカルボン酸誘導体(活性エステル)523.7g(0.89モル)と、更にヘキサフルオロ−2,2−ビス(3−アミノ−4−ヒドロキシフェニル)プロパン1.0モルの替わりに、2,2−ビス(3−アミノ−4−ヒドロキシフェニル)プロパン219.6g(0.85モル)と2,2−ビス(3−アミノ−4−ヒドロキシフェニル)スルホン58.2g(0.15モル)を用いて、実施例2と同様にして反応し、一般式(1)で示され、Xが下記式X−2、X−3でYが下記式Y−2で、a=100、b=0からなるポリアミド樹脂(A−3)を合成した。
更にフェノール化合物(C−1)を(C−2)に替え、感光性ジアゾキノン化合物(Q−1)とフェノール化合物(C−2)の添加量をそれぞれ表1の様に変えた他は実施例2と同様の評価を行った。
【0054】
<比較例1〜4>
表1の配合割合で、実施例と同様にしてポジ型感光性樹脂組成物を作製し、実施例1と同様にして評価した。なお比較例1に用いたポリアミド樹脂は実施例1、比較例2に用いたポリアミド樹脂は実施例2、比較例3、比較例4に用いたポリアミド樹脂は実施例5のものと同一である。
以下に、実施例及び比較例のX−1、X−2、X−3、Y−1、Y−2、Y−3、Y−4、Q−1、Q−2、C−1〜C―4の構造を示す。
【0055】
【化27】
Figure 0004254177
【0056】
【化28】
Figure 0004254177
【0057】
【化29】
Figure 0004254177
【0058】
【表1】
Figure 0004254177
【0059】
【発明の効果】
本発明のポジ型感光性樹脂組成物は、露光部における溶解速度が速く高感度で、又未露光部の膜減りも非常に小さく、高感度かつ高解像度という優れた特徴を有している。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a positive photosensitive resin composition and a semiconductor device having high sensitivity and high resolution characteristics.
[0002]
[Prior art]
Conventionally, polyimide resin having excellent heat resistance and excellent electrical characteristics, mechanical characteristics, and the like has been used for the surface protection film and interlayer insulating film of the semiconductor element. Due to the thinning and downsizing of semiconductor devices and the shift to surface mounting by solder reflow, there is a demand for significant improvement in heat cycle resistance, heat shock resistance, etc., and higher performance resins have become necessary. .
[0003]
On the other hand, a technique for imparting photosensitivity to the polyimide resin itself has attracted attention, and examples thereof include a negative photosensitive polyimide resin represented by the following formula (6).
[Chemical 6]
Figure 0004254177
[0004]
If this is used, a part of the pattern creation process can be simplified, and there is an effect of shortening the process and improving the yield. However, since a solvent such as N-methyl-2-pyrrolidone is required for development, safety and handling There is a problem with sex. Therefore, a positive photosensitive resin composition that can be developed with an alkaline aqueous solution has recently been developed, and a positive photosensitive resin composition composed of a polyamide resin that is a precursor of a polyimide resin and a diazoquinone compound that is a photosensitive material has been disclosed. (For example, refer to Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4.) These base resins contain a carboxyl group or a group in which the carboxyl group is blocked with a suitable protecting group.
[0005]
In general, a positive photosensitive resin composition typified by a semiconductor resist using ultraviolet rays such as g-line and i-line as a light source is composed of a base resin containing a phenolic hydroxyl group soluble in an alkaline aqueous solution and 1,2- It is composed of a photosensitive diazoquinone compound having a benzoquinone diazide or 1,2-naphthoquinone diazide structure. The development mechanism of this positive photosensitive resin composition is as follows. The unexposed portion of the diazoquinone compound is insoluble in an alkaline aqueous solution as a developer, and exhibits a dissolution inhibiting ability by interacting with the phenolic hydroxyl group in the base resin, and has resistance to this. On the other hand, the diazoquinone compound undergoes a chemical change upon exposure, becomes soluble in an aqueous alkali solution, and promotes the solubility of the base resin. By utilizing the difference in solubility between the exposed portion and the unexposed portion to dissolve and remove the exposed portion, a coating film pattern of only the unexposed portion can be created.
[0006]
Accordingly, the carboxyl group in the base resin of the positive photosensitive resin composition described in each of the above publications cannot interact with the diazoquinone compound, and is much more soluble in an alkaline aqueous solution than the phenolic hydroxyl group. Due to the high value, there is a problem that the dissolution inhibiting ability of the unexposed part is not formed, and the target film thickness cannot be obtained, and the pattern formation itself becomes difficult. In addition, when the carboxyl group is a group blocked with an appropriate protective group, the unexposed area is sufficiently resistant to an aqueous alkali solution, but the exposed area is poorly soluble, so that a resin residue (scum) is observed after development. There's a problem.
For this reason, a positive photosensitive resin composition composed of a polyamide resin branched from a phenolic hydroxyl group and a diazoquinone compound has been disclosed (for example, see Patent Document 5). However, when cured by heat, there is a problem that the moisture resistance reliability is lowered because the hydroxyl group remains without dehydration condensation and ring closure like polyimide.
[0007]
When these photosensitive resin compositions are used, the sensitivity of the photosensitive resin composition is particularly important. If the sensitivity is low, the exposure time becomes long and the throughput decreases. Therefore, in order to improve the sensitivity of the photosensitive resin composition, for example, when the molecular weight of the base resin is reduced, the film thickness of the unexposed area is increased during development, so that the required film thickness cannot be obtained, or the pattern There arises a problem that the shape collapses.
In the case of the photosensitive resin composition using the base resin having a carboxyl group as described above, since the base resin has high solubility, it shows high sensitivity as a result, but there is almost no ability to prevent dissolution of unexposed portions. This causes a problem that the desired film thickness cannot be obtained. For this reason, for example, when a method of shortening the development time is employed, there is a problem that the sensitivity is lowered because there is not sufficient time for the exposed portion to dissolve. In the case of a photosensitive resin composition using a base resin having a carboxyl group blocked with an appropriate protecting group, the solubility of the entire resin in an alkaline aqueous solution is poor, resulting in a problem of extremely low sensitivity. .
[0008]
[Patent Document 1]
JP 5-204156 (pages 2-9)
[Patent Document 2]
JP-A-6-258836 (pages 2 to 5)
[Patent Document 3]
JP-A-10-186658 (pages 2 to 4)
[Patent Document 4]
JP-A-10-307394 (pages 2-7)
[Patent Document 5]
JP-A-3-247655 (pages 1 to 4)
[0009]
[Problems to be solved by the invention]
The present invention provides a positive photosensitive resin composition and a semiconductor device having high sensitivity and high resolution while maintaining conventional characteristics.
[0010]
[Means for Solving the Problems]
In the present invention, 100 parts by weight of the polyamide resin (A) represented by the general formula (1), 1 to 50 parts by weight of the photosensitive diazoquinone compound (B), and 1 to 30 of the phenolic compound (C) represented by the general formula (2). It is a positive photosensitive resin composition consisting of parts by weight.
[0011]
[Chemical 7]
Figure 0004254177
[0012]
[Chemical 8]
Figure 0004254177
[0013]
As a more preferable embodiment, positive photosensitive resin in which X in the polyamide resin represented by the general formula (1) is selected from the group of the formula (3) and Y is selected from the group of the formula (4). It is a resin composition.
[0014]
[Chemical 9]
Figure 0004254177
[0015]
[Chemical Formula 10]
Figure 0004254177
[0016]
The polyamide resin represented by general formula (1) is a one that is end-capped with an acid anhydride, a group resulting from the anhydride, comprising selected from the group of the formula (5) positive Type photosensitive resin composition.
[0017]
Embedded image
Figure 0004254177
[0018]
The photosensitive diazoquinone compound is an ester compound of a phenol compound and 1,2-naphthoquinone-2-diazide-5-sulfonic acid or 1,2-naphthoquinone-2-diazide-4-sulfonic acid, and has the general formula (2 ) Is a positive photosensitive resin composition in which the hydroxyl groups in the phenol compound are not adjacent to each other.
Also, a semiconductor device manufactured using the positive photosensitive resin composition described above, wherein the semiconductor film has a thickness of 0.1 to 30 μm after heating and dehydrating and closing the positive photosensitive resin composition. It is a semiconductor device obtained by coating on an element, prebaking, exposing, developing, and heating.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
X in the polyamide resin containing the structure represented by the general formula (1) represents a divalent to tetravalent cyclic compound group, R 1 is a hydroxyl group, O—R 3 , and m is an integer of 0 to 2, May be the same or different. Y represents a divalent to hexavalent cyclic compound group, R 2 is a hydroxyl group, a carboxyl group, O—R 3 , COO—R 3 , n is an integer of 0 to 4, and these may be the same or different. . Here, R 3 is an organic group having 1 to 15 carbon atoms. However, when R 1 has no hydroxyl group, at least one R 2 must be a carboxyl group. When R 2 has no carboxyl group, at least one R 1 must be a hydroxyl group.
The polyamide resin of the general formula (1) is, for example, a diamine having a structure of X or a compound selected from bis (aminophenol), 2,4-diaminophenol and the like, and a silicone diamine having a structure of Z and Y blended as necessary. It is obtained by reacting with a compound selected from tetracarboxylic anhydride, trimellitic anhydride, dicarboxylic acid or dicarboxylic acid dichloride, dicarboxylic acid derivative, hydroxydicarboxylic acid, hydroxydicarboxylic acid derivative, etc. having the structure of . In the case of a dicarboxylic acid, an active ester dicarboxylic acid derivative obtained by reacting 1-hydroxy-1,2,3-benzotriazole or the like in advance may be used in order to increase the reaction yield or the like. In the polyamide resin containing the structure represented by the general formula (1), O-R 3 , COO-R 3 as a substituent of O-R 3, Y as a substituent of X is a hydroxyl group, an alkaline aqueous solution of the carboxyl group Is a group protected with an organic group having 1 to 15 carbon atoms for the purpose of adjusting the solubility in the solvent, and a hydroxyl group and a carboxyl group may be protected as necessary. Examples of R 3 include formyl group, methyl group, ethyl group, propyl group, isopropyl group, tertiary butyl group, tertiary butoxycarbonyl group, phenyl group, benzyl group, tetrahydrofuranyl group, tetrahydropyranyl group and the like. It is done. When this polyamide resin is heated at about 300 to 400 ° C., it is dehydrated and closed, and a heat resistant resin is obtained in the form of polyimide, polybenzoxazole or copolymerization of both.
[0020]
X of the polyamide resin containing the structure represented by the general formula (1) of the present invention is, for example,
Embedded image
Figure 0004254177
However, it is not limited to these. Among these, particularly preferred are those selected from the group of formula (3), and two or more of them may be used.
[0021]
Moreover, Y of the polyamide resin containing the structure represented by the general formula (1) is, for example,
Embedded image
Figure 0004254177
However, it is not limited to these. Among these, particularly preferred are those selected from the group of formula (4), and two or more of them may be used.
[0022]
In addition, the positive photosensitive resin composition of the present invention includes a tetracarboxylic acid anhydride, trimellitic acid anhydride, dicarboxylic acid or dicarboxylic acid dichloride or dicarboxylic acid derivative, hydroxydicarboxylic acid having a Y structure from the viewpoint of storage stability. , A compound selected from hydroxydicarboxylic acid derivatives and the like, a diamine or bis (aminophenol) having the structure of X, a compound selected from 2,4-diaminophenol, etc., and a silicone diamine having the structure of Z blended as necessary After synthesizing a polyamide resin having the structure represented by the general formula (1), the aliphatic amino group or ring having at least one alkenyl group or alkynyl group as the terminal amino group contained in the polyamide resin Capping as an amide with an acid anhydride containing a compound group Masui.
[0023]
As a group derived from an acid anhydride containing an aliphatic group or cyclic compound group having at least one alkenyl group or alkynyl group, for example,
Embedded image
Figure 0004254177
However, it is not limited to these.
Among these, particularly preferred are those selected from the group of formula (5), and two or more of them may be used.
[0024]
Furthermore, Z of the polyamide resin containing the structure represented by the general formula (1) used as necessary is, for example,
Figure 0004254177
However, the present invention is not limited to these, and two or more kinds may be used.
[0025]
Z of the polyamide resin having the structure represented by the general formula (1) is used when particularly excellent adhesion to a substrate such as a silicon wafer is required, for example. Up to%. If it exceeds 40 mol%, the solubility of the resin is extremely lowered, developing residue (scum) is generated, and pattern processing becomes impossible.
[0026]
In the positive photosensitive resin composition of the present invention, it is important to further contain a phenol compound represented by the general formula (2). As a technique for adding a phenol compound to a positive resist composition, for example, Japanese Patent Application Laid-Open No. 3-200251, Japanese Patent Application Laid-Open No. 3-200262, Japanese Patent Application Laid-Open No. 4-1650, JP-A-4-11260, JP-A-4-12356, JP-A-4-12357, and the like. However, when the phenolic compounds as shown in these are used in a positive photosensitive resin composition based on the polyamide resin in the present invention, the effect of improving the sensitivity is small. However, when the phenol compound represented by the general formula (2) in the present invention is used, the dissolution rate in the exposed area is increased and the sensitivity is improved. In addition, the film loss at the unexposed area as seen when the sensitivity is improved by reducing the molecular weight is very small.
[0027]
Examples of the phenol compound represented by the general formula (2) include, but are not limited to, the following compounds.
Embedded image
Figure 0004254177
[0028]
Embedded image
Figure 0004254177
[0029]
The positive photosensitive resin composition of the present invention may contain other phenolic compounds as necessary for the purpose of improving sensitivity. Examples include, but are not limited to, the following.
Embedded image
Figure 0004254177
[0030]
Embedded image
Figure 0004254177
[0031]
Embedded image
Figure 0004254177
[0032]
Embedded image
Figure 0004254177
[0033]
The compounding quantity of the phenol compound (C) shown by General formula (2) is 1-30 weight part with respect to 100 weight part of polyamide resins shown by General formula (1). If it is less than 1 part by weight, the sensitivity at the time of development is lowered, and if it exceeds 30 parts by weight, the remaining film ratio is remarkably lowered at the time of development, or precipitation occurs during frozen storage, resulting in lack of practicality.
[0034]
The photosensitive diazoquinone compound (B) used in the present invention is a compound having a 1,2-benzoquinonediazide or 1,2-naphthoquinonediazide structure. US Pat. Nos. 2,772,975, 2,797, No. 213 and No. 3,669,658 are known substances. For example, the following are mentioned.
[0035]
Embedded image
Figure 0004254177
[0036]
Embedded image
Figure 0004254177
[0037]
Among these, an ester compound of a phenol compound and 1,2-naphthoquinone-2-diazide-5-sulfonic acid or 1,2-naphthoquinone-2-diazide-4-sulfonic acid is particularly preferable. Examples of the phenol compound to be used include the following compounds, but are not limited thereto. These may be used alone or in combination.
[0038]
Embedded image
Figure 0004254177
[0039]
Embedded image
Figure 0004254177
[0040]
Embedded image
Figure 0004254177
[0041]
The compounding quantity of the photosensitive diazoquinone compound (B) used by this invention is 1-50 weight part with respect to 100 weight part of polyamide resins shown by General formula (1). If it is less than 1 part by weight, the patterning property of the polyamide resin becomes poor, and if it exceeds 50 parts by weight, the sensitivity is greatly reduced.
[0042]
If necessary, a dihydropyridine derivative may be added to the positive photosensitive resin composition of the present invention in order to enhance the photosensitive properties. Examples of the dihydropyridine derivative include 2,6-dimethyl-3,5-diacetyl-4- (2′-nitrophenyl) -1,4-dihydropyridine, 4- (2′-nitrophenyl) -2,6-dimethyl- 3,5-dicarboethoxy-1,4-dihydropyridine, 4- (2 ′, 4′-dinitrophenyl) -2,6-dimethyl-3,5-dicarbomethoxy-1,4-dihydropyridine, etc. Can do.
[0043]
If necessary, additives such as a leveling agent and a silane coupling agent can be added to the positive photosensitive resin composition in the present invention.
In the present invention, these components are dissolved in a solvent and used in the form of a varnish. Solvents include N-methyl-2-pyrrolidone, γ-butyrolactone, N, N-dimethylacetamide, dimethyl sulfoxide, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, propylene glycol Monomethyl ether acetate, methyl lactate, ethyl lactate, butyl lactate, methyl-1,3-butylene glycol acetate, 1,3-butylene glycol-3-monomethyl ether, methyl pyruvate, ethyl pyruvate, methyl-3-methoxypropio And the like, and may be used alone or in combination.
[0044]
In the positive photosensitive resin composition of the present invention, first, the resin composition is applied to an appropriate support such as a silicon wafer, a ceramic substrate, an aluminum substrate, or the like. In the case of a semiconductor device, the coating amount is applied so that the final film thickness after curing is 0.1 to 30 μm. When the film thickness is less than 0.1 μm, it is difficult to sufficiently exhibit the function as a protective surface film of the semiconductor element, and when it exceeds 30 μm, it is difficult to obtain a fine processed pattern. Examples of the coating method include spin coating using a spinner, spray coating using a spray coater, dipping, printing, roll coating, and the like. Next, after prebaking at 60 to 130 ° C. to dry the coating film, actinic radiation is applied to the desired pattern shape. As the actinic radiation, X-rays, electron beams, ultraviolet rays, visible rays and the like can be used, but those having a wavelength of 200 to 500 nm are preferable.
[0045]
Next, a relief pattern is obtained by dissolving and removing the irradiated portion with a developer. Developers include inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, and aqueous ammonia, primary amines such as ethylamine and n-propylamine, diethylamine, and di-n. Secondary amines such as propylamine, tertiary amines such as triethylamine and methyldiethylamine, alcohol amines such as dimethylethanolamine and triethanolamine, quaternary ammonium such as tetramethylammonium hydroxide and tetraethylammonium hydroxide An aqueous solution of an alkali such as a salt and an aqueous solution to which an appropriate amount of a water-soluble organic solvent such as methanol or ethanol or a surfactant is added can be preferably used. As a developing method, methods such as spraying, paddle, dipping, and ultrasonic waves are possible.
[0046]
Next, the relief pattern formed by development is rinsed. Distilled water is used as the rinse liquid. Next, heat treatment is performed to form an imide ring and an oxazole ring, thereby obtaining a final pattern rich in heat resistance.
The positive photosensitive resin composition according to the present invention is useful not only for semiconductor applications, but also as interlayer insulation for multilayer circuits, cover coats for flexible copper-clad plates, solder resist films, liquid crystal alignment films, and the like.
[0047]
【Example】
Hereinafter, the present invention will be described specifically by way of examples.
<Example 1>
<Synthesis of polyamide resin>
A thermometer containing 17.1 g (0.055 mol) of 4,4′-oxydiphthalic anhydride, 8.15 g (0.110 mol) of 2-methyl-2-propanol and 10.9 g (0.138 mol) of pyridine. Into a four-necked separable flask equipped with a stirrer, a raw material inlet, and a dry nitrogen gas inlet tube, 150 g of N-methyl-2-pyrrolidone was added and dissolved. 14.9 g (0.110 mol) of 1-hydroxy-1,2,3-benzotriazole was added dropwise to this reaction solution together with 30 g of N-methyl-2-pyrrolidone, and then 22.7 g (0.110 mol) of dicyclohexylcarbodiimide. Was added dropwise together with 50 g of N-methyl-2-pyrrolidone and allowed to react overnight at room temperature. Thereafter, a dicarboxylic acid derivative (active ester) 27 obtained by reacting 1.0 mol of diphenyl ether-4,4′-dicarboxylic acid and 2 mol of 1-hydroxy-1,2,3-benzotriazole with this reaction solution. 0.1 g (0.055 mol) and 44.8 g (0.122 mol) hexafluoro-2,2-bis (3-amino-4-hydroxyphenyl) propane with 70 g N-methyl-2-pyrrolidone, Stir at room temperature for 2 hours. Thereafter, the mixture was reacted at 75 ° C. for 12 hours using an oil bath.
[0048]
Next, 8.0 g (0.049 mol) of 5-norbornene-2,3-dicarboxylic anhydride dissolved in 40 g of N-methyl-2-pyrrolidone was added, and the mixture was further stirred for 12 hours to complete the reaction. After filtering the reaction mixture, the reaction mixture was poured into a solution of water / methanol = 3/1 (volume ratio), the precipitate was collected by filtration, washed thoroughly with water, and then dried under vacuum to obtain the general formula (1) And X is the following formula X-1, Y is the following formulas Y-1 and Y-2, and a polyamide resin (A-1) having a = 100 and b = 0 was synthesized.
[0049]
<Preparation of positive photosensitive resin composition>
100 g of the synthesized polyamide resin (A-1), 21 g of a photosensitive diazoquinone compound having the structure of the following formula (Q-1), and 12 g of a phenol compound having the structure of the following formula (C-1) were mixed with N-methyl-2-pyrrolidone. After dissolving in 200 g, it was filtered through a 0.2 μm Teflon (R) filter to obtain a positive photosensitive resin composition.
[0050]
<Characteristic evaluation>
This positive photosensitive resin composition was applied onto a silicon wafer using a spin coater, and then prebaked on a hot plate at 115 ° C. for 5 minutes to obtain a coating film having a thickness of about 7 μm. Through this coating film, a mask made by Toppan Printing Co., Ltd. (test chart No. 1: a remaining pattern and a blanking pattern with a width of 0.88 to 50 μm are drawn), and an i-line stepper (Nikon Corporation 4425i) ) And changed the exposure amount. Next, the exposed portion was dissolved and removed by immersing in a 1.40% tetramethylammonium hydroxide aqueous solution twice for 45 seconds, and then rinsed with pure water for 10 seconds. As a result, it was confirmed that a pattern was formed from the portion irradiated with an exposure amount of 230 mJ / cm 2 . (Sensitivity is 230 mJ / cm 2 ). The resolution was as high as 3 μm.
[0051]
<Example 2>
352.4 g (0.88) of a dicarboxylic acid derivative (active ester) obtained by reacting 0.9 mol of terephthalic acid, 0.1 mol of isophthalic acid and 2 mol of 1-hydroxy-1,2,3-benzotriazole Mol) and 366.3 g (1.0 mol) of hexafluoro-2,2-bis (3-amino-4-hydroxyphenyl) propane were equipped with a thermometer, stirrer, raw material inlet, and dry nitrogen gas inlet tube. It put in the separable flask of 4 necks, and 3000 g of N-methyl-2-pyrrolidone was added and dissolved. Thereafter, the mixture was reacted at 75 ° C. for 12 hours using an oil bath. Next, 32.8 g (0.2 mol) of 5-norbornene-2,3-dicarboxylic acid anhydride was added to the mixture of Y-4 dissolved in 500 g of N-methyl-2-pyrrolidone, and the mixture was further stirred for 12 hours. The reaction was terminated. After filtering the reaction mixture, the reaction mixture was poured into a solution of water / methanol = 3/1 (volume ratio), the precipitate was collected by filtration, washed thoroughly with water, and then dried under vacuum to obtain the general formula (1) Where X is a mixture of the following formula X-1, Y is a mixture of the following formulas Y-3 and Y-4, and the target polyamide resin (A-2) having a = 100 and b = 0 was synthesized. Further, the same evaluation as in Example 1 was performed except that the addition amounts of the photosensitive diazoquinone compound (Q-1) and the phenol compound (C-1) were changed as shown in Table 1.
[0052]
<Example 3>
The same evaluation as in Example 2 was performed except that the addition amounts of the photosensitive diazoquinone compound (Q-1) and the phenol compound (C-1) in Example 2 were changed as shown in Table 1.
<Example 4>
The photosensitive diazoquinone compound (Q-1) in Example 2 was changed to (Q-2), the phenolic compound (C-1) was changed to (C-2) , and the respective addition amounts were changed as shown in Table 1. Otherwise, the same evaluation as in Example 2 was performed.
[0053]
<Example 5>
In the synthesis of the polyamide resin in Example 2, instead of 0.9 mol of terephthalic acid and 0.1 mol of isophthalic acid, 1.0 mol of diphenyl ether-4,4′-dicarboxylic acid was used, and this was combined with 1-hydroxy-1 , 2,3-benzotriazole (2.0 mol) obtained by reacting with 2.0 mol of dicarboxylic acid derivative (active ester) and hexafluoro-2,2-bis (3-amino) Instead of 1.0 mole of -4-hydroxyphenyl) propane, 219.6 g (0.85 mole) of 2,2-bis (3-amino-4-hydroxyphenyl) propane and 2,2-bis (3-amino) The reaction was conducted in the same manner as in Example 2 using 58.2 g (0.15 mol) of -4-hydroxyphenyl) sulfone, and X was represented by the following general formula (1). 3 and Y is the following formula Y-2, and a polyamide resin (A-3) comprising a = 100 and b = 0 was synthesized.
Further, except that the phenol compound (C-1) was replaced with (C-2), and the addition amounts of the photosensitive diazoquinone compound (Q-1) and the phenol compound (C-2) were changed as shown in Table 1, respectively. Evaluation similar to 2 was performed.
[0054]
<Comparative Examples 1-4>
A positive photosensitive resin composition was produced in the same manner as in the Example at the blending ratio in Table 1, and evaluated in the same manner as in Example 1. The polyamide resin used in Comparative Example 1 is the same as that in Example 1, the polyamide resin used in Comparative Example 2 is the same as that in Example 2, Comparative Example 3 and Comparative Example 4 are the same.
Below, X-1, X-2, X-3, Y-1, Y-2, Y-3, Y-4, Q-1, Q-2, C-1 to C of Examples and Comparative Examples Shows the structure of -4.
[0055]
Embedded image
Figure 0004254177
[0056]
Embedded image
Figure 0004254177
[0057]
Embedded image
Figure 0004254177
[0058]
[Table 1]
Figure 0004254177
[0059]
【The invention's effect】
The positive photosensitive resin composition of the present invention has excellent characteristics such as high dissolution rate in the exposed area and high sensitivity, and very little film loss in the unexposed area, high sensitivity and high resolution.

Claims (9)

一般式(1)で示されるポリアミド樹脂(A)100重量部、感光性ジアゾキノン化合物(B)1〜50重量部及び一般式(2)で示されるフェノール化合物(C)1〜30重量部を含むことを特徴とするポジ型感光性樹脂組成物。
Figure 0004254177
Figure 0004254177
100 parts by weight of polyamide resin (A) represented by general formula (1), 1 to 50 parts by weight of photosensitive diazoquinone compound (B) and 1 to 30 parts by weight of phenolic compound (C) represented by general formula (2) A positive photosensitive resin composition characterized by the above.
Figure 0004254177
Figure 0004254177
一般式(1)で示されるポリアミド樹脂中のXが、式(3)の群より選ばれてなる請求項1記載のポジ型感光性樹脂組成物。
Figure 0004254177
The positive photosensitive resin composition according to claim 1, wherein X in the polyamide resin represented by the general formula (1) is selected from the group of the formula (3).
Figure 0004254177
一般式(1)で示されるポリアミド樹脂中のYが、式(4)の群より選ばれてなる請求項1又は2記載のポジ型感光性樹脂組成物。
Figure 0004254177
The positive photosensitive resin composition according to claim 1 or 2, wherein Y in the polyamide resin represented by the general formula (1) is selected from the group of the formula (4).
Figure 0004254177
一般式(1)で示されるポリアミド樹脂が、酸無水物によって末端封止されているものであって、
該酸無水物は、脂肪族基又は環式化合物基を含む酸無水物であって、
該脂肪族基又は該環式化合物基は、アルケニル基又はアルキニル基を少なくとも1個有する基である請求項1〜3のいずれかに記載のポジ型感光性樹脂組成物。
The polyamide resin represented by the general formula (1) is end-capped with an acid anhydride,
The acid anhydride is an acid anhydride containing an aliphatic group or a cyclic compound group,
The positive photosensitive resin composition according to claim 1, wherein the aliphatic group or the cyclic compound group is a group having at least one alkenyl group or alkynyl group.
一般式(1)で示されるポリアミド樹脂が、酸無水物によって末端封止されているものであって、該酸無水物に起因する基が、式(5)の群より選ばれてなる請求項1〜3いずれかに記載のポジ型感光性樹脂組成物。
Figure 0004254177
Claim polyamide resin represented by general formula (1) is a one that is end-capped with an acid anhydride, a group resulting from the anhydride, comprising selected from the group of the formula (5) The positive photosensitive resin composition in any one of 1-3 .
Figure 0004254177
感光性ジアゾキノン化合物が、フェノール化合物と1,2−ナフトキノン−2−ジアジド−5−スルホン酸又は1,2−ナフトキノン−2−ジアジド−4−スルホン酸とのエステル化合物である請求項1〜5のいずれかに記載のポジ型感光性樹脂組成物。  The photosensitive diazoquinone compound is an ester compound of a phenol compound and 1,2-naphthoquinone-2-diazide-5-sulfonic acid or 1,2-naphthoquinone-2-diazide-4-sulfonic acid. The positive photosensitive resin composition according to any one of the above. 一般式(2)で示されるフェノール化合物中の各水酸基同士が、隣接していない請求項1〜6のいずれかに記載のポジ型感光性樹脂組成物。  The positive photosensitive resin composition in any one of Claims 1-6 in which each hydroxyl group in the phenol compound shown by General formula (2) is not adjacent. 請求項1〜7のいずれかに記載のポジ型感光性樹脂組成物を用いて製作された半導体装置。  A semiconductor device manufactured using the positive photosensitive resin composition according to claim 1. 請求項1〜7のいずれかに記載のポジ型感光性樹脂組成物を加熱脱水閉環後の膜厚が、0.1〜30μmになるように半導体素子上に塗布し、プリベーク、露光、現像、加熱して得られる半導体装置。  The positive photosensitive resin composition according to any one of claims 1 to 7 is applied onto a semiconductor element so that the film thickness after heat dehydration and ring closure is 0.1 to 30 μm, and prebaking, exposure, development, A semiconductor device obtained by heating.
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