JP2009539266A - 二酸化シリコンの膜質を高める新規な堆積プラズマ硬化サイクルプロセス - Google Patents
二酸化シリコンの膜質を高める新規な堆積プラズマ硬化サイクルプロセス Download PDFInfo
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- JP2009539266A JP2009539266A JP2009513423A JP2009513423A JP2009539266A JP 2009539266 A JP2009539266 A JP 2009539266A JP 2009513423 A JP2009513423 A JP 2009513423A JP 2009513423 A JP2009513423 A JP 2009513423A JP 2009539266 A JP2009539266 A JP 2009539266A
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- layer
- precursor
- silicon oxide
- annealing
- plasma
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- 238000000034 method Methods 0.000 title claims abstract description 107
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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Abstract
【選択図】 図1
Description
[0023]図1は、発明の実施形態に従って基板上に酸化物層を形成する方法100におけるステップを含むフローチャートを示す図である。方法100には、堆積チャンバ102にギャップ含有基板を準備するステップが含まれる。基板は、高さと幅の高アスペクト比が約5:1以上、7:1以上、10:1以上、13:1以上、15:1以上等のギャップ、トレンチ等を含む構造がその上に形成されていてもよい。
[0053]本発明の実施形態を実施することができる堆積システムは、他の種類のシステムの中でも、高密度プラズマ化学気相堆積(HDP-CVD)システム、プラズマ増強型化学気相堆積(PECVD)システム、大気圧未満化学気相堆積(SACVD)システム、熱化学気相堆積システムが含まれ得る。本発明の実施形態を実施することができるCVDシステムの具体例としては、カリフォルニア州サンタクララのアプライドマテリアルズから入手できるCENTURAULTIMATMHDP-CVDチャンバ/システム、PRODUCERTMPECVDチャンバ/システムが含まれる。
Claims (36)
- 基板上のギャップを酸化シリコンで充填する方法であって:
堆積チャンバに有機シリコン前駆物質と酸素前駆物質を導入するステップと、
該前駆物質を反応させて、該基板上の該ギャップに第一酸化シリコン層を形成するステップと;
該第一酸化シリコン層をエッチングして、該層内の炭素含量を減少させるステップと;
該第一層上に第二酸化シリコン層を形成し、該第二層をエッチングして、該層内の炭素含量を減少させるステップと;
該ギャップを充填した後、該酸化シリコン層をアニールするステップと;
を含む、前記方法。 - 該酸素前駆物質が、該堆積チャンバの外部で生成される原子酸素を含む、請求項1に記載の方法。
- 該原子酸素が、
アルゴンを含むガス混合物からプラズマを生成し;
該プラズマに酸素前駆物質を導入し、ここで、該酸素前駆物質が解離して該原子酸素を形成する;
ことにより形成される、請求項2に記載の方法。 - 該酸素前駆物質が、分子酸素、オゾン、及び二酸化窒素からなる群より選ばれる、請求項3に記載の方法。
- 該原子酸素が、
酸素前駆物質を光解離チャンバに導入すること;
該酸素前駆物質を紫外光にさらし、ここで、該紫外光が該酸素前駆物質を解離して原子酸素を形成すること;
によって形成される、請求項2に記載の方法。 - 該有機シリコン前駆物質と該原子酸素が、該堆積チャンバに導入されるまで混合されない、請求項2に記載の方法。
- 該有機シリコン前駆物質が、ジメチルシラン、トリメチルシラン、テトラメチルシラン、ジエチルシラン、テトラメチルオルトシリケート(TMOS)、テトラエチルオルトシリケート(TEOS)、オクタメチルトリシロキサン(OMTS)、オクタメチルシクロテトラシロキサン(OMCTS)、テトラメチルシクロテトラシロキサン(TOMCATS)、DMDMOS、DEMS、メチルトリエトキシシラン(MTES)、フェニルジメチルシラン、またはフェニルシランを含む、請求項1に記載の方法。
- 該第一酸化シリコン層と該第二酸化シリコン層の厚さがそれぞれ約100オングストローム〜約200オングストロームである、請求項1に記載の方法。
- 該第一酸化シリコン層と該第二酸化シリコン層をエッチングするステップが:
該層を第一密度を有する第一プラズマにさらす工程であって、該第一プラズマが該層内でより大きい炭素分子を解離する、前記工程と;
該層を該第一密度より高い第二密度を持つ第二プラズマにさらす工程であって、該第二プラズマが該層内で酸化シリコン結合を解離する、前記工程と;
を含む、請求項1に記載の方法。 - 該酸化シリコン層をアニールするステップが、乾燥非反応性ガス中で約800℃以上の温度でアニールする工程を含む、請求項1に記載の方法。
- 該非反応性ガスが窒素(N2)であり、該温度が900℃である、請求項10に記載の方法。
- 該方法が該第一層と該第二層上に追加の酸化シリコン層を形成するステップを含み、各追加の酸化シリコン層の厚さが約50オングストローム〜約500オングストロームである、請求項1に記載の方法。
- 該追加の酸化シリコン層が、該第一酸化シリコン層と該第二酸化シリコン層と同一方法でエッチングされる、請求項12に記載の方法。
- 該酸化シリコン層の全厚さが約500オングストローム〜約10000オングストロームである、請求項12に記載の方法。
- アニールされた該酸化シリコン層のウェットエッチング速度比(WERR)が約2:1以下である、請求項1に記載の方法。
- アニールされた該酸化シリコン層のウェットエッチング速度比(WERR)が約1.8:1〜約1.4:1である、請求項1に記載の方法。
- アニールされた該酸化シリコン層のk値が、約4.0以下である、請求項1に記載の方法。
- 該方法が、該前駆物質を該堆積チャンバに導入する前に該基板を高密度プラズマで前処理するステップを含む、請求項1に記載の方法。
- 該ギャップの高さと幅のアスペクト比が、約5:1以上である、請求項1に記載の方法。
- 該ギャップの高さと幅のアスペクト比が、約13:1以上である、請求項1に記載の方法。
- 基板上に多層酸化シリコン膜を形成する方法であって:
該基板上に複数の酸化シリコン層を形成するステップであって、各酸化シリコン層の厚さが約100オングストローム〜約200オングストロームであり、各層が:
(i)有機シリコン前駆物質と原子酸素前駆物質を反応チャンバに導入すること;
(ii)該前駆物質を反応させて、該基板上に該層を形成すること;
(iii)該層をエッチングして、該層内の不純物を減少させること;
により形成される、前記ステップと;
該複数の層をアニールするステップと;
を含む、前記方法。 - 該原子酸素前駆物質が、該堆積チャンバの外部で生成され、該有機シリコン前駆物質と該原子酸素前駆物質が該反応チャンバに導入されるまで混合されない、請求項21に記載の方法。
- 該層をエッチングするステップが、
第一密度を持つ第一プラズマに該層をさらす工程であって、該第一プラズマが該層内のより大きい炭素分子を解離する、前記工程と;
第一密度より大きい第二密度を持つ第二プラズマに該層をさらす工程であって、該第二プラズマが該層内の水酸化シリコン結合を解離する、前記工程と;
を含む、請求項21に記載の方法。 - 該複数の層をアニールするステップが、熱アニール、スチームアニール、プラズマアニール、紫外光アニール、eビームアニール、又はマイクロ波アニールを含む、請求項21に記載の方法。
- 該複数の層をアニールするステップが、
該基板をスチームの存在下に第一アニール温度で加熱する工程と;
該基板を乾燥窒素中で第二アニール温度で加熱する工程と;
を含む、請求項21に記載の方法。 - 該第一アニール温度が約650℃であり、該第二アニール温度が約900℃である、請求項25に記載の方法。
- 該複数の層のそれぞれが、約125オングストローム/分〜約2μm/分の速度で形成される、請求項21に記載の方法。
- 該層のそれぞれが、約3分以内にエッチングされる、請求項21に記載の方法。
- 該複数の層が、約30分以内にアニールされる、請求項21記載にの方法。
- 該複数の層のウェットエッチング速度比(WERR)が、約1.8:1〜約1.4:1である、請求項21に記載の方法。
- 該複数の層のk値が、約4.0以下である、請求項21に記載の方法。
- 該多層酸化シリコン膜の厚さのk値が、約1000オングストローム〜約3000オングストロームである、請求項21に記載の方法。
- ウエハ基板上でギャップのマルチサイクル酸化シリコンボトムアップギャップ充填を行うシステムであって:
該ギャップ含有基板が保持される堆積チャンバと;
該堆積チャンバに結合した遠隔プラズマ生成システムであって、該プラズマ生成システムを用いて原子酸素前駆物質を生成する、前記遠隔プラズマ生成システムと;
有機シリコン前駆物質を該堆積チャンバに供給するために用いられる有機シリコン前駆物質源と;
該原子酸素前駆物質と該シリコン前駆物質を該堆積チャンバに流すように用いられる前駆物質処理システムであって、該前駆物質処理システムが該原子酸素とシリコン前駆物質が該堆積チャンバに入る前に混合しないようにする、前記前駆物質処理システムと;
を備える、前記システム。 - 該システムが、該基板上に形成された複数の酸化シリコン層をアニールするアニールシステムを更に備えている、請求項33に記載のシステム。
- 該アニールシステムが、熱アニールシステム、スチームアニールシステム、プラズマアニールシステム、紫外光アニールシステム、eビームアニールシステム、又はマイクロ波アニールシステムを備えている、請求項34に記載のシステム。
- 該システムが、高密度プラズマ化学気相堆積(HDPCVD)システムを備えている、請求項33記載の方法。
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Also Published As
Publication number | Publication date |
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EP2036120A4 (en) | 2012-02-08 |
WO2007140377A2 (en) | 2007-12-06 |
EP2036120A2 (en) | 2009-03-18 |
KR20090019865A (ko) | 2009-02-25 |
KR101115750B1 (ko) | 2012-03-07 |
TW200807558A (en) | 2008-02-01 |
TWI366876B (en) | 2012-06-21 |
WO2007140377A9 (en) | 2008-10-16 |
CN101454877B (zh) | 2012-07-04 |
JP5225268B2 (ja) | 2013-07-03 |
CN101454877A (zh) | 2009-06-10 |
WO2007140377A3 (en) | 2008-08-28 |
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