JP2018100439A - ガス処理装置及びガス処理方法 - Google Patents
ガス処理装置及びガス処理方法 Download PDFInfo
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- 239000006185 dispersion Substances 0.000 claims abstract description 144
- 238000009792 diffusion process Methods 0.000 claims abstract description 83
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 23
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- 239000010937 tungsten Substances 0.000 description 24
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- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
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- 238000000231 atomic layer deposition Methods 0.000 description 4
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- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
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Abstract
Description
前記処理室に設けられ、前記基板が載置される載置部と、
前記載置部の上方側に位置する天井部を構成し、前記処理ガスをシャワー状に噴出するための複数のガス噴出孔が形成されるガス拡散板と、
前記ガス拡散板の上方側に前記処理ガスの拡散空間を介して対向する対向部に設けられ、前記拡散空間に横方向に前記処理ガスを分散させるために周方向に沿って複数のガス吐出口が各々形成される複数のガス分散部と、
上流側が前記各ガス分散部に共通する共通流路をなし、途中で分岐して下流側が当該各ガス分散部に接続されると共に、前記共通流路から各ガス分散部に至るまでの長さが互いに揃えられた前記処理ガスの流路と、
を備え、
前記ガス分散部は、前記拡散空間を平面で見たときに当該拡散空間の中心部周りに、中心が各々位置すると共に前記拡散空間の周方向に沿った複数の第1の円に沿い、1つの前記第1の円において複数ずつ、前記拡散空間の中心部からの距離が互いに異なるレイアウトで配置されることを特徴とすることを特徴とする。
前記処理室に設けられる載置部に前記基板を載置する工程と、
前記載置部の上方側に位置する天井部を構成するガス拡散板に形成される複数のガス噴出孔から前記処理ガスをシャワー状に噴出する工程と、
前記ガス拡散板の上方側に前記処理ガスの拡散空間を介して対向する対向部に設けられ、周方向に沿って複数のガス吐出口が各々形成される複数のガス分散部から前記拡散空間に横方向に前記処理ガスを吐出して分散させる工程と、
上流側が前記各ガス分散部に共通する共通流路をなし、途中で分岐して下流側が当該各ガス分散部に接続されると共に、前記共通流路から各ガス分散部に至るまでの長さが互いに揃えられた流路に前記処理ガスを供給する工程と、
を備え、
前記ガス分散部は、前記拡散空間を平面で見たときに当該拡散空間の中心部周りに、中心が各々位置すると共に前記拡散空間の周方向に沿った複数の円に沿い、1つの前記円において複数ずつ、前記拡散空間の中心部からの距離が互いに異なるレイアウトで配置されることを特徴とすることを特徴とする。
本発明のガス処理装置の一実施形態である成膜装置1について、図1の縦断側面図を参照して説明する。この成膜装置1は、基板であるウエハWを格納して処理を行う真空容器である処理容器11を備えており、処理容器11内はウエハWに処理を行う処理室として構成される。そして、原料ガスであるタングステン含有ガスと、反応ガスであるH2(水素)ガスとを交互に繰り返し複数回、処理容器11内に供給して、ALDによりウエハWにW(タングステン)膜を形成する。ウエハWは、例えば直径が300mmの円形に構成されている。タングステン含有ガス及びH2(水素)ガスはウエハWに処理を行うための処理ガスであり、キャリアガスであるN2(窒素)ガスと共に、ウエハWに供給される。
続いて第2の実施形態の成膜装置について、第1の実施形態の成膜装置1との差異点を中心に説明する。図11は、第2の実施形態の成膜装置の天井面34を示している。この第2の実施形態では、天井面34において12個のガス分散部41が設けられており、ガス供給ユニット3には、この12個のガス分散部41にガスを導入するためにガス流路5の代わりにガス流路8が設けられる。図12はガス流路8の斜視図である。
続いて、第3の実施形態の成膜装置に設けられるガス供給ユニット101について、第1の実施形態の成膜装置1に設けられるガス供給ユニット3との差異点を中心に説明する。このガス供給ユニット101としては、ガス供給ユニット3に対してガス分散部41の配置及び設けられる個数について異なっている。図15は、ガス供給ユニット101の下面側斜視図について示している。ただしこの図15においては、ガス分散部41が示されるように、シャワーヘッド35の表示は省略している。また、図16、図17は、既述の図5、図6と同様に、互いに90°向きが異なるガス供給ユニット101の縦断面を示しており、各縦断面は拡散空間36の中心の点P1を通る。なお、図16、図17では、断面を示したガス分散部41以外のガス分散部41についての表示は省略している。
1 成膜装置
11 処理容器
17 排気機構
21 載置台
3 ガス供給ユニット
34 天井面
35 シャワーヘッド
36 拡散空間
39 ガス噴出孔
41 ガス分散部
43 ガス吐出孔
5 ガス流路
Claims (6)
- 真空雰囲気である処理室内の基板に対して処理ガスを供給して処理を行うガス処理装置において、
前記処理室に設けられ、前記基板が載置される載置部と、
前記載置部の上方側に位置する天井部を構成し、前記処理ガスをシャワー状に噴出するための複数のガス噴出孔が形成されるガス拡散板と、
前記ガス拡散板の上方側に前記処理ガスの拡散空間を介して対向する対向部に設けられ、前記拡散空間に横方向に前記処理ガスを分散させるために周方向に沿って複数のガス吐出口が各々形成される複数のガス分散部と、
上流側が前記各ガス分散部に共通する共通流路をなし、途中で分岐して下流側が当該各ガス分散部に接続されると共に、前記共通流路から各ガス分散部に至るまでの長さが互いに揃えられた前記処理ガスの流路と、
を備え、
前記ガス分散部は、前記拡散空間を平面で見たときに当該拡散空間の中心部周りに、中心が各々位置すると共に前記拡散空間の周方向に沿った複数の第1の円に沿い、1つの前記第1の円において複数ずつ、前記拡散空間の中心部からの距離が互いに異なるレイアウトで配置されることを特徴とすることを特徴とするガス処理装置。 - 前記流路は、前記共通流路から前記ガス分散部に至るまで、トーナメントの組み合わせを決める線図状に階段状に分岐されるように形成されていることを特徴とする請求項1記載のガス処理装置。
- 一つの前記第1の円に沿って3つ以上の前記ガス分散部が配置されることを特徴とする請求項1または2記載のガス処理装置。
- 各第1の円に沿って配置される複数の前記ガス分散部は、前記拡散空間の中心部に中心が位置する第2の円に沿って配置されていることを特徴とする請求項1ないし3のいずれか一つに記載のガス処理装置。
- 前記ガス拡散板は、前記載置台の中心部に対向する第1の対向領域と、前記載置台の周縁部に対向する第2の対向領域とを備え、
前記第1の対向領域は、前記第2の対向領域よりも隣接する前記ガス噴出孔同士の間隔が大きいことを特徴とする請求項1ないし4のいずれか一つに記載のガス処理装置。 - 真空雰囲気である処理室内の基板に対して処理ガスを供給して処理を行うガス処理方法において、
前記処理室に設けられる載置部に前記基板を載置する工程と、
前記載置部の上方側に位置する天井部を構成するガス拡散板に形成される複数のガス噴出孔から前記処理ガスをシャワー状に噴出する工程と、
前記ガス拡散板の上方側に前記処理ガスの拡散空間を介して対向する対向部に設けられ、周方向に沿って複数のガス吐出口が各々形成される複数のガス分散部から前記拡散空間に横方向に前記処理ガスを吐出して分散させる工程と、
上流側が前記各ガス分散部に共通する共通流路をなし、途中で分岐して下流側が当該各ガス分散部に接続されると共に、前記共通流路から各ガス分散部に至るまでの長さが互いに揃えられた流路に前記処理ガスを供給する工程と、
を備え、
前記ガス分散部は、前記拡散空間を平面で見たときに当該拡散空間の中心部周りに、中心が各々位置すると共に前記拡散空間の周方向に沿った複数の円に沿い、1つの前記円において複数ずつ、前記拡散空間の中心部からの距離が互いに異なるレイアウトで配置されることを特徴とすることを特徴とするガス処理方法。
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