JP6545094B2 - 成膜方法及び成膜装置 - Google Patents
成膜方法及び成膜装置 Download PDFInfo
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- JP6545094B2 JP6545094B2 JP2015246161A JP2015246161A JP6545094B2 JP 6545094 B2 JP6545094 B2 JP 6545094B2 JP 2015246161 A JP2015246161 A JP 2015246161A JP 2015246161 A JP2015246161 A JP 2015246161A JP 6545094 B2 JP6545094 B2 JP 6545094B2
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- gas supply
- reaction gas
- halogen
- rotary table
- containing gas
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- 239000007789 gas Substances 0.000 claims description 163
- 239000012495 reaction gas Substances 0.000 claims description 112
- 229910052736 halogen Inorganic materials 0.000 claims description 61
- 150000002367 halogens Chemical class 0.000 claims description 61
- 238000012545 processing Methods 0.000 claims description 41
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- 230000000694 effects Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 2
- 229910052719 titanium Inorganic materials 0.000 claims 2
- 239000010936 titanium Substances 0.000 claims 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
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- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
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- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
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- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
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Description
前記基板の表面及び前記窪みパターンの上部にプラズマにより活性化したハロゲン含有ガスを供給して吸着させ、吸着阻害基を形成するハロゲン含有ガス供給工程と、
前記窪みパターンを含む前記基板の表面に第1の反応ガスを供給し、前記基板の表面の前記吸着阻害基に吸着を阻害されない領域に前記第1の反応ガスを吸着させる第1の反応ガス供給工程と、
前記窪みパターンを含む前記基板の表面に前記第1の反応ガスと反応する第2の反応ガスを供給し、前記基板の表面に吸着した前記第1の反応ガスと前記第2の反応ガスとの反応生成物を生成することにより、該反応生成物の分子層を堆積させる第2の反応ガス供給工程と、を有する。
該処理室内に設けられ、表面上に基板を載置可能な基板載置領域を有する回転テーブルと、
該回転テーブル上に回転方向に沿って所定領域に設けられ、前記回転テーブル上に第1の反応ガスを供給可能な第1の反応ガス供給領域と、
前記回転テーブル上であって、該第1の反応ガス供給領域の前記回転方向下流側に設けられ、前記回転テーブル上に前記第1の反応ガスと反応して反応生成物を生成可能な第2の反応ガスを供給可能な第2の反応ガス供給領域と、
前記回転テーブル上であって、該第2の反応ガス供給領域の前記回転方向下流側に設けられ、前記回転テーブル上にハロゲン含有ガスを供給可能なハロゲン含有ガス供給領域と、
前記ハロゲン含有ガス供給領域に設けられた前記ハロゲン含有ガスをプラズマ化するプラズマ発生手段と、
前記回転テーブルより下方に設けられ、前記ハロゲン含有ガスにエッチング作用を生じさせない所定の温度に前記回転テーブルを加熱するヒータと、を有する。
始めに、本発明の実施形態に係る成膜装置について説明する。図1から図3までを参照すると、成膜装置は、ほぼ円形の平面形状を有する扁平な真空容器1と、真空容器1内に設けられ、真空容器1の中心に回転中心を有する回転テーブル2と、を備えている。真空容器1は、内部に収容したウエハの表面上に成膜処理を行うための処理室である。真空容器1は、有底の円筒形状を有する容器本体12と、容器本体12の上面に対して、例えばOリングなどのシール部材13(図1)を介して気密に着脱可能に配置される天板11とを有している。
次に、図9を用いて、本発明の実施形態に係る成膜方法について上述の成膜装置を用いて行う場合を例にとり説明する。図9は、本発明の実施形態に係る成膜方法の一例の一連の工程を示した図である。図9(a)は、本発明の実施形態に係る成膜方法の成膜開始時のウエハWの状態を示した図である。
今まで、吸着阻害基を生成するために、ハロゲン含有ガスをウエハWに供給した実施形態について説明したが、Ar/H2の混合ガスをプラズマ化して供給しても同様の効果を得ることができる。つまり、H基が吸着阻害基として機能し、TiCl4等の原料ガスの吸着を阻害することができ、ボトムアップ成膜を行うことが可能である。かかる成膜方法を実施するためには、プラズマ発生器80を搭載、起動するとともに、反応ガスノズル33からAr/H2の混合ガスをプラズマ化して供給し、トレンチT内の上部にH基を吸着阻害基として吸着させ、ALD法による成膜を行えばよい。
次に、本発明の実効性を示す実験結果について説明する。
2 回転テーブル
4 凸状部
5 突出部
7 ヒータユニット
11 天板
12 容器本体
15 搬送口
24 凹部
31〜33 反応ガスノズル
41、42 分離ガスノズル
80 プラズマ発生器
120〜122 流量制御器
130〜132 ガス供給源
P1〜P3 処理領域
W ウエハ
T トレンチ
Claims (15)
- 基板の表面に形成されている窪みパターンに底面側から膜を埋め込む成膜方法であって、
前記基板の表面及び前記窪みパターンの上部にプラズマにより活性化したハロゲン含有ガスを供給して吸着させ、吸着阻害基を形成するハロゲン含有ガス供給工程と、
前記窪みパターンを含む前記基板の表面に第1の反応ガスを供給し、前記基板の表面の前記吸着阻害基に吸着を阻害されない領域に前記第1の反応ガスを吸着させる第1の反応ガス供給工程と、
前記窪みパターンを含む前記基板の表面に前記第1の反応ガスと反応する第2の反応ガスを供給し、前記基板の表面に吸着した前記第1の反応ガスと前記第2の反応ガスとの反応生成物を生成することにより、該反応生成物の分子層を堆積させる第2の反応ガス供給工程と、を有する成膜方法。 - 前記基板の温度は、前記ハロゲン含有ガスがエッチング作用を生じない所定の温度以下に設定されている請求項1に記載の成膜方法。
- 前記所定の温度は、250℃である請求項2に記載の成膜方法。
- 前記所定の温度は、150℃である請求項2に記載の成膜方法。
- 前記ハロゲン含有ガスは、前記窪みパターンの底面に到達しない所定の流量で供給される請求項1乃至4のいずれか一項に記載の成膜方法。
- 前記ハロゲン含有ガスは、フッ素を含むガスである請求項1乃至5のいずれか一項に記載の成膜方法。
- 前記吸着阻害基は、フッ素基が形成される請求項5又は6に記載の成膜方法。
- 前記第1の反応ガスは、チタン含有ガスである請求項1乃至7のいずれか一項に記載の成膜方法。
- 前記チタン含有ガスはTiCl4であり、
前記膜はTiO2である請求項8に記載の成膜方法。 - 前記基板は、回転テーブル上に周方向に沿って配置され、
該回転テーブル上に前記周方向に沿ってハロゲン含有ガス供給領域と、第1の反応ガス供給領域と、第2の反応ガス供給領域とが回転方向に沿って互いに離間して配置され、
前記回転テーブルが前記回転方向に回転することにより、前記ハロゲン含有ガス供給工程と、前記第1の反応ガス供給工程と、前記第2の反応ガス供給工程とを、順次繰り返して前記分子層を堆積させる請求項1乃至9のいずれか一項に記載の成膜方法。 - 前記ハロゲン含有ガス供給領域と前記第1の反応ガス供給領域との間、及び前記第1の反応ガス供給領域と前記第2の反応ガス供給領域との間には、パージガスを前記基板の表面に供給するパージガス供給領域が設けられ、
前記ハロゲン含有ガス供給工程と前記第1の反応ガス供給工程との間、及び前記第1の反応ガス供給工程と前記第2の反応ガス供給工程との間には、パージガス供給工程が設けられた請求項10に記載の成膜方法。 - 処理室と、
該処理室内に設けられ、表面上に基板を載置可能な基板載置領域を有する回転テーブルと、
該回転テーブル上に回転方向に沿って所定領域に設けられ、前記回転テーブル上に第1の反応ガスを供給可能な第1の反応ガス供給領域と、
前記回転テーブル上であって、該第1の反応ガス供給領域の前記回転方向における下流側に設けられ、前記回転テーブル上に前記第1の反応ガスと反応して反応生成物を生成可能な第2の反応ガスを供給可能な第2の反応ガス供給領域と、
前記回転テーブル上であって、該第2の反応ガス供給領域の前記回転方向における下流側に設けられ、前記回転テーブル上にハロゲン含有ガスを供給可能なハロゲン含有ガス供給領域と、
前記ハロゲン含有ガス供給領域に設けられた前記ハロゲン含有ガスをプラズマ化するプラズマ発生手段と、
前記回転テーブルより下方に設けられ、前記ハロゲン含有ガスにエッチング作用を生じさせない所定の温度に前記回転テーブルを加熱するヒータと、を有する成膜装置。 - 前記ハロゲン含有ガス供給領域と前記第1の反応ガス供給領域との間、及び前記第1の反応ガス供給領域と前記第2の反応ガス供給領域との間に設けられ、前記回転テーブル上にパージガスを供給可能なパージガス供給領域を有する請求項12に記載の成膜装置。
- 前記基板の表面に窪みパターンが形成されているときに、
前記ハロゲン含有ガス供給領域において、前記ハロゲン含有ガスが前記窪みパターンの底面まで到達しない流量に調節し前記ハロゲン含有ガスを供給可能な流量調整手段を更に有する請求項12又は13に記載の成膜装置。 - 前記ハロゲン含有ガス供給領域を前記第2の反応ガス供給領域から区画する側壁を有するフレーム部材を備えた請求項12乃至14のいずれか一項に記載の成膜装置。
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