JP2007521660A - 低温かつ低堆積レートでteosキャップ層を形成する方法 - Google Patents
低温かつ低堆積レートでteosキャップ層を形成する方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 85
- 230000008021 deposition Effects 0.000 title claims abstract description 42
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 title claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000000151 deposition Methods 0.000 claims abstract description 48
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 47
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims description 31
- 229910003481 amorphous carbon Inorganic materials 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 238000002310 reflectometry Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 50
- 229910021420 polycrystalline silicon Inorganic materials 0.000 abstract description 37
- 229920005591 polysilicon Polymers 0.000 abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 27
- 229910052799 carbon Inorganic materials 0.000 abstract description 27
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 abstract description 16
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- 239000007789 gas Substances 0.000 description 25
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- 239000001301 oxygen Substances 0.000 description 18
- 229910052760 oxygen Inorganic materials 0.000 description 18
- 239000001307 helium Substances 0.000 description 16
- 229910052734 helium Inorganic materials 0.000 description 16
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 16
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- 239000012159 carrier gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
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- 238000010521 absorption reaction Methods 0.000 description 1
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- 238000003486 chemical etching Methods 0.000 description 1
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Abstract
Description
本発明は、概して、ポリシリコンフィーチャをパターンニングするために、アモルファスカーボンのハードマスク層上に二酸化シリコンのキャップ層を形成するための方法に関する。本発明は、以下の説明に限定されることなく、370℃以下の温度でプラズマエンハンスト化学気相成長法によって形成された二酸化シリコン層を提供することによって、最終的に得られるポリシリコンフィーチャの欠陥を実質的に減らすことができると考えられている。この発見に基づいて、下層のアモルファスカーボン層とともに、所望の光学特徴を提供するために求められる、二酸化シリコン層の厚さを5−50nmの範囲内で確実に制御することができるように、二酸化シリコン層を形成するためのプラズマエンハンストCVDプロセスが設計される。一般的に、低温での堆積速度を速めることができるTEOSベースのプラズマエンハンストCVDプロセスは、本発明では、欠陥率の低減が求められるので、ある実施形態では、層厚を確実に制御し、その結果、二酸化シリコン/アモルファスカーボン積層体の光学特徴を確実なものにするために、堆積速度を低下させるように堆積処理を制御する。
以下の詳細な説明と図面に例示されているように、実施形態を用いて本発明を記載したが、以下の詳細な説明と図面は本発明を開示されている特定の例示的実施形態に限定することを意図とするものではなく、むしろ、説明した例示的な実施形態は単に本発明の様々な形態を例証するものであって、本発明の範囲は添付の請求の範囲によって定義される。
更に、実際の堆積処理中に使用されているように、堆積中に搬送ガスと反応ガスを供給する吹き出し口に対する基板201の距離を所望の値に調節することができる。更に、ヘリウムなどの搬送ガスを導入してもよく、また続いて、圧力を実際の堆積ステップの間における圧力よりも非常に高い圧力である約10Torr未満に調整する間に、ガス雰囲気に酸素を供給することもできる。
8〜12秒間、ガスを供給しない状態で、約300℃の温度で基板201の雰囲気を安定化させるステップ;
ガスを流さずに、約8〜約12秒間、堆積温度で温度を維持しながら、堆積における構造と一致するように対応するプロセスチャンバの構造を定める、すなわち、ガスの噴射口と基板210との距離を定めるステップ;
堆積時の流量に実質的に対応する流量で、約4〜約6秒間、ヘリウムを導入するステップ;
例えば、約3000sccmの堆積時の流量で、約9Torrに昇圧し、約8〜約12秒間、酸素を供給してガス雰囲気を確立するステップ;
周囲圧力を、例えば約5.5Torrの堆積圧力にまで下げながら、例えば、毎分、750mg〜850mgの供給増加速度でTEOS供給を起動させるステップ;
残りのパラメータを実質的に一定に保ちながら、約13〜約17秒間、供給速度を毎分約450mg〜550mgに減速することによって、ガス雰囲気220が含むTEOSの量を所望の堆積量に調整するステップ;
最終的な二酸化シリコンの厚さが約5nm〜50nmの範囲となるように、約3〜約8秒の時間間隔内で堆積時間を制御しながら、実質的にパラメータが一定のプラズマ雰囲気220Aを確立するステップ;
TEOSの供給とプラズマの生成を中断する一方で、2〜5秒間、ヘリウムの流量を約1000sccm〜1200sccmへ、また、酸素の流量を約1200sccm〜1400sccmへ調節して、ヘリウムと酸素の流量を減らすステップ;
ヘリウムの供給は維持しながら酸素の供給を中断する、もしくは、反応副産物のポンプ処理を継続しながら、ヘリウムの流量を約1200sccm〜1400sccmに増加させるステップ;
副産物を取り除きながら、全てのガス供給を約9〜約13秒間中断するステップ、を含むことができる。
Claims (10)
- 二酸化シリコンキャップ層を形成する方法であって、
基板(201)上にアモルファスカーボン層(205)を形成するステップと、
約5〜50ナノメータの範囲の厚さを有する前記キャップ層(206)を形成するために、約370℃以下の温度で前記アモルファスカーボン層(205)上に、プラズマ雰囲気(220)のTEOSから二酸化シリコン(206)を堆積するステップと、を含む方法。 - 前記二酸化シリコンは、約330℃以下の温度で堆積される、請求項1に記載の方法。
- 前記二酸化シリコンは、約280℃〜約320℃の範囲の温度で堆積される、請求項1に記載の方法。
- 前記二酸化シリコンは、約300℃の温度で堆積される、請求項1に記載の方法。
- 前記プラズマ雰囲気の圧力を約4.5〜約6.5Torrの範囲に調節して堆積速度を制御するステップを更に含む、請求項1に記載の方法。
- TEOSの供給を毎分約600mg以下に調節するステップを更に含む、請求項5に記載の方法。
- 前記TEOSの供給を毎分約550mg〜約450mgの範囲に調節する、請求項6に記載の方法。
- 前記TEOSの供給を毎分約500mgに調節する、請求項7記載の方法。
- 反射防止層を形成する方法であって、
基板(201)上にパターン形成される材料層(202)を形成するステップと、
前記材料層(202)上に第1の厚さのアモルファスカーボン層(205)を形成するステップと、
前記アモルファスカーボン層(205)上に、370℃以下の温度で、第2の厚さ(206b)の二酸化シリコン層(206)を形成するステップと、を含み、
約2%以下の特定の露光波長で反射率を生成するために前記第1および第2の厚さを選択する、方法。 - 前記第2の厚さを約5〜約50nmの範囲に調節する、請求項9に記載の方法。
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DE10339988.7 | 2003-08-29 | ||
DE10339988A DE10339988B4 (de) | 2003-08-29 | 2003-08-29 | Verfahren zur Herstellung einer antireflektierenden Schicht |
US10/835,411 | 2004-04-29 | ||
US10/835,411 US7807233B2 (en) | 2003-08-29 | 2004-04-29 | Method of forming a TEOS cap layer at low temperature and reduced deposition rate |
PCT/US2004/021598 WO2005024922A1 (en) | 2003-08-29 | 2004-07-06 | A method of forming a teos cap layer at low temperature and reduced deposition rate |
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US (1) | US7807233B2 (ja) |
JP (1) | JP4782010B2 (ja) |
CN (1) | CN100449689C (ja) |
DE (1) | DE10339988B4 (ja) |
TW (1) | TW200509258A (ja) |
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WO2011108188A1 (ja) * | 2010-03-04 | 2011-09-09 | 信越半導体株式会社 | Soiウェーハの設計方法及び製造方法 |
WO2011108189A1 (ja) * | 2010-03-04 | 2011-09-09 | 信越半導体株式会社 | Soiウェーハの設計方法及び製造方法 |
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US7858514B2 (en) | 2007-06-29 | 2010-12-28 | Qimonda Ag | Integrated circuit, intermediate structure and a method of fabricating a semiconductor structure |
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KR20150064330A (ko) * | 2013-12-03 | 2015-06-11 | 삼성전자주식회사 | 반도체 장치 및 이의 제조 방법 |
CN105063576A (zh) * | 2015-08-24 | 2015-11-18 | 沈阳拓荆科技有限公司 | 一种采用teos源的低温镀膜方法 |
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US7807233B2 (en) | 2010-10-05 |
TW200509258A (en) | 2005-03-01 |
DE10339988B4 (de) | 2008-06-12 |
US20050048222A1 (en) | 2005-03-03 |
CN1846297A (zh) | 2006-10-11 |
JP4782010B2 (ja) | 2011-09-28 |
CN100449689C (zh) | 2009-01-07 |
DE10339988A1 (de) | 2005-03-31 |
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