JP2008520100A - 多孔性低k誘電体フィルムの紫外線に補助された細孔シーリング - Google Patents
多孔性低k誘電体フィルムの紫外線に補助された細孔シーリング Download PDFInfo
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- JP2008520100A JP2008520100A JP2007541278A JP2007541278A JP2008520100A JP 2008520100 A JP2008520100 A JP 2008520100A JP 2007541278 A JP2007541278 A JP 2007541278A JP 2007541278 A JP2007541278 A JP 2007541278A JP 2008520100 A JP2008520100 A JP 2008520100A
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- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
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Abstract
【解決手段】多孔性低k誘電体フィルムをシールする方法であって、炭化、酸化及び/又は高密度化の手段により、多孔性誘電体の表面をシールするために有効な強度、時間、波長及び雰囲気中において、多孔性低k誘電体フィルムの多孔性表面を紫外線(UV)照射に暴露することから一般的になる方法。表面の多孔性低k材料の表面は、紫外線暴露後に該表面に実質的に開孔が存在しないよう約20ナノメーター未満又は約20ナノメーターに等しい深さでシールされる。
【選択図】図1
Description
とからなる。
、高密度PECVD、フォトンアシストCVD、プラズマ−フォトンアシストCVD、極低温CVD、化学補助蒸着、ホット−フィラメントCVD、液体ポリマー前駆物質のCVD、超臨界液体からの被着、又はトランスポート(transport )重合(“TP”)を含む。フィルムを形成するために使用することができる他の方法は、スピンコーティング法、ディップコーティング法、ラングミュア- ブロジェット セルフ−アセンブリ法又はミスティングデポジション法を含む。
(前記両式中、Rは有機置換基を表わす)を有する有機的に変性されたシリケート、及び(iv)オルトシリケート、好ましくは、組成Si(OR)4 を有する部分的に縮合されたオルトシリケートを含む。
他の実施態様においては2.5未満、そして更に他の実施態様においては2.0未満に低下させるのに十分である。幾つかの実施態様において、細孔濃度は、多孔性マトリックスの全容積に基づいて、少なくとも5容量%、他の実施態様においては少なくとも10容量%、そして更に他の実施態様においては少なくとも20容量%、そして一般的に70容量%を越えず、そしてまた他の実施態様においては60容量%を越えない。
た電子衝撃であってよい。更に、異なるスペクトル分布を持つ紫外線発生管が、用途に応じて選択され得る。
本実施例において、ピッチに応じて絶縁破壊電圧が、本発明の開示に従ってパターン化された多孔性誘電体材料の紫外線シーリングの前及び後で測定された。両方の基板がアニールされた。線幅は175ミクロンであった。図1に示されるように、濃密配列について、絶縁破壊分野における十分な改良が観察された。
本実施例において、その上に配置された多孔性誘電体材料を有する基板が、希弗化水素酸湿式エッチングプロセスに様々な時間暴露された。基板は、本発明の開示に基づいて、不活性雰囲気において(パージ1)、還元性雰囲気において(パージ2)又は酸化性雰囲気において(パージ3)、紫外線に暴露された。対照が、紫外線に対する如何なる暴露もなしに、湿式エッチプロセスに暴露された。結果が図2に示されており、この結果は、紫外線に暴露された場合の湿式エッチ抵抗における向上並びに、紫外線暴露が起こった環境への依存性を明らかに示している。
く、本開示の教示について特定の状況又は材料に適合するために、多くの変更が行われ得る。従って、本開示は、本開示を行うために示された最良の形態として開示された特定の実施態様に限定されないが、しかし、本本開示は、添付された請求項の範囲内に含まれる全ての実施態様を含むことが意図されている。
Claims (29)
- 基板上に配置された多孔性低k誘電体材料をシールする方法であって、
前記多孔性低k誘電体材料の表面を約20ナノメーター未満又は約20ナノメーターに等しい深さでシールするために有効な所定時間、強度及び波長において、前記多孔性低k誘電体材料の表面を紫外線照射パターンに暴露することからなり、ここで、該表面に実質的に開孔が存在しない方法。 - 前記紫外線照射パターンが400ナノメーター未満の広帯域波長を含む、請求項1記載の方法。
- 前記紫外線照射パターンが約100ナノメーターないし400ナノメーターの広帯域波長を含む、請求項1記載の方法。
- 前記多孔性低k誘電体材料の表面を所定時間、強度及び波長において前記紫外線照射パターンに暴露することが反応性パージ環境内において行われる、請求項1記載の方法。
- 前記多孔性低k誘電体材料の表面を前記紫外線照射パターンに暴露することが、N2 、H2 、Ar、He、Ne、H2 O蒸気、NH3 、CO、CO2 、O2 、O3 、Cx Hy 、Cx Fy 、Cx Hz Fy (これらの式中、xは1ないし6の整数を表わし、yは4ないし14の整数を表わし、そしてzは1ないし14の整数を表わす。)及びこれらの混合物の雰囲気中において行われる、請求項1記載の方法。
- 前記多孔性低k誘電体材料の表面を前記紫外線照射パターンに暴露することが、約10ナノメーター未満又は約10ナノメーターに等しい深さで前記多孔性低k誘電体材料の表面をシールするために有効な所定時間、強度及び波長において行われる、請求項1記載の方法。
- 前記多孔性低k誘電体材料の表面を前記紫外線照射パターンに暴露することが、平均細孔直径にほぼ等しい深さで前記多孔性低k誘電体材料の表面をシールするために有効な所定時間、強度及び波長において行われる、請求項1記載の方法。
- 電気的相互接続構造を形成する方法であって、
基板上に多孔性低k誘電体材料をパターン形成すること、
多孔性低k誘電体フィルムを、多孔性低k誘電体材料の表面を約20ナノメーター未満又は約20ナノメーターに等しい深さでシールするために有効な所定時間、強度及び波長において紫外線照射パターンに暴露すること(ここで、該表面に実質的に開孔が存在しない。)、及び
バリヤー層及び/又は導電層を、パターン形成された多孔性低k誘電体材料上に被着すること(ここで、該バリヤー層は実質的にピンホールを含まない。)、
からなる方法。 - 前記導電層を被着する前に、前記多孔性低k誘電体材料上に前記バリヤー層を被着することを更に含む、請求項8記載の方法。
- 前記紫外線照射が400ナノメーター未満の広帯域波長を含む、請求項8記載の方法。
- 前記紫外線照射が、N2 、H2 、Ar、He、Ne、H2 O蒸気、NH3 、CO、CO2 、O2 、O3 、Cx Hy 、Cx Fy 、Cx Hz Fy (これらの式中、xは1ないし6の整数を表わし、yは4ないし14の整数を表わし、そしてzは1ないし14の整数を表わ
す。)及びこれらの混合物の雰囲気中において行われる、請求項8記載の方法。 - 基板上に配置された多孔性低k誘電体材料をシールする方法であって、
酸素を含む雰囲気中で、前記多孔性低k誘電体材料の表面を約20ナノメーター未満又は約20ナノメーターに等しい深さでシールするために有効な所定時間、強度及び波長において紫外線照射パターンに前記表面を暴露することにより、前記多孔性低k誘電体材料の表面を酸化することからなる方法。 - 前記紫外線照射が400ナノメーター未満の広帯域波長を含む、請求項12記載の方法。
- 前記多孔性低k誘電体材料を紫外線照射に暴露した後に、該多孔性低k誘電体材料をアニーリングすることを更に含む請求項12記載の方法。
- 基板上に配置された多孔性低k誘電体材料をシールする方法であって、
前記多孔性低k誘電体材料の表面を約20ナノメーター未満又は約20ナノメーターに等しい深さでシールするために有効な所定時間、強度及び波長において紫外線照射パターンに前記表面を暴露することにより、前記多孔性低k誘電体材料の表面を炭化することからなる方法。 - 前記紫外線照射が400ナノメーター未満の広帯域波長を含む、請求項15記載の方法。
- 前記多孔性低k誘電体材料を紫外線照射に暴露した後に、該多孔性低k誘電体材料をアニーリングすることを更に含む請求項15記載の方法。
- 基板上に配置された多孔性低k誘電体材料をシールする方法であって、
前記多孔性低k誘電体材料の表面を約20ナノメーター未満又は約20ナノメーターに等しい深さでシールするために有効な所定時間、強度及び波長において紫外線照射パターンに前記表面を暴露することにより、前記多孔性低k誘電体材料の表面を高密度化することからなる方法。 - 前記紫外線照射が400ナノメーター未満の広帯域波長を含む、請求項19記載の方法。
- 前記多孔性低k誘電体材料を紫外線照射に暴露した後に、該多孔性低k誘電体材料をアニーリングすることを更に含む請求項19記載の方法。
- 基板上に配置された多孔性低k誘電体材料をシールする方法であって、
前記多孔性低k誘電体材料の表面に表面結合を生成させ且つ反応性部位を形成するために有効な所定時間、強度及び波長において紫外線照射パターンに前記表面を暴露すること、及び
表面をシールするために前記反応性部位を物質と反応させること
からなり、ここで、前記表面を前記物質と反応させた後の表面に実質的に開孔が存在しない方法。 - 前記多孔性低k誘電体材料の表面を所定時間、強度及び波長において紫外線照射パターンに暴露することが、該暴露の間反応性ガスを導入することを更に含む、請求項21記載の方法。
- 前記反応性ガスが、N2 、H2 、H2 O蒸気、NH3 、CO、CO2 、O2 、O3 、Cx Hy 、Cx Fy 、Cx Hz Fy (これらの式中、xは1ないし6の整数を表わし、yは4ないし14の整数を表わし、そしてzは1ないし14の整数を表わす。)及びこれらの混合物からなる、請求項22記載の方法。
- 基板上に配置された多孔性低k誘電体材料をシールする方法であって、
前記多孔性低k誘電体材料の表面に表面結合を生成させ且つ反応性部位を形成するために有効な所定時間、強度及び波長において紫外線照射パターンに前記表面を暴露すること、及び
前記表面をシールするためにシーリング材料を反応させること(ここで、実質的に開孔が存在しない。)
からなる方法。 - 前記多孔性低k誘電体材料の表面を所定時間、強度及び波長において紫外線照射パターンに暴露することが、該暴露の間反応性ガスを導入することを更に含む、請求項24記載の方法。
- 前記反応性ガスが、N2 、H2 、H2 O蒸気、NH3 、CO、CO2 、O2 、O3 、Cx Hy 、Cx Fy 、Cx Hz Fy (これらの式中、xは1ないし6の整数を表わし、yは4ないし14の整数を表わし、そしてzは1ないし14の整数を表わす。)及びこれらの混合物からなる、請求項25記載の方法。
- 基板上に配置された多孔性低k誘電体材料をシールする方法であって、
前記多孔性低k誘電体材料の表面をシール材前躯体並びに、該表面に表面結合を生成させ且つ反応性部位を形成するために有効な所定時間、強度及び波長において紫外線照射パターンに暴露すること、及び
前記表面をシールするために、前記シール材前躯体を前記反応性部位及び前記表面結合と反応させること(ここで、前記表面は実質的に開孔が存在しない。)
からなる方法。 - シーラント材料又はシーラント前躯体との反応を補助するために、紫外線暴露の間反応性ガスが使用される、請求項27記載の方法。
- 前記反応性ガスが、N2 、H2 、H2 O蒸気、NH3 、CO、CO2 、O2 、O3 、Cx Hy 、Cx Fy 、Cx Hz Fy (これらの式中、xは1ないし6の整数を表わし、yは4ないし14の整数を表わし、そしてzは1ないし14の整数を表わす。)及びこれらの混合物からなる、請求項28記載の方法。
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US10/987,276 US7678682B2 (en) | 2004-11-12 | 2004-11-12 | Ultraviolet assisted pore sealing of porous low k dielectric films |
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US7241704B1 (en) * | 2003-03-31 | 2007-07-10 | Novellus Systems, Inc. | Methods for producing low stress porous low-k dielectric materials using precursors with organic functional groups |
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Cited By (1)
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US9306052B2 (en) | 2014-04-14 | 2016-04-05 | Fujitsu Limited | Compound semiconductor device and method of manufacturing the same |
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KR20070086070A (ko) | 2007-08-27 |
WO2006055346A2 (en) | 2006-05-26 |
US7678682B2 (en) | 2010-03-16 |
EP1812962A2 (en) | 2007-08-01 |
TW200620467A (en) | 2006-06-16 |
US20070134935A1 (en) | 2007-06-14 |
TWI425569B (zh) | 2014-02-01 |
KR101177591B1 (ko) | 2012-08-27 |
US7704872B2 (en) | 2010-04-27 |
CN100530564C (zh) | 2009-08-19 |
WO2006055346A3 (en) | 2007-03-22 |
CN101099232A (zh) | 2008-01-02 |
US20060105566A1 (en) | 2006-05-18 |
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