JP6817757B2 - 基板処理装置及び基板移送方法 - Google Patents
基板処理装置及び基板移送方法 Download PDFInfo
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- 238000012546 transfer Methods 0.000 title claims description 90
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- 238000003860 storage Methods 0.000 claims description 249
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 167
- 239000001301 oxygen Substances 0.000 claims description 167
- 229910052760 oxygen Inorganic materials 0.000 claims description 167
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- 238000010926 purge Methods 0.000 claims description 151
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- 230000008859 change Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 description 16
- 239000011261 inert gas Substances 0.000 description 14
- 238000005259 measurement Methods 0.000 description 14
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- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 4
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
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Description
該基板搬送領域に隔壁を介して隣接して設けられるとともに、前記第1の酸素濃度よりも高い第2の酸素濃度を有し、前記基板を基板保管器内に保持した状態で搬送可能な基板保管器搬送領域と、
該基板保管器搬送領域内に設けられ、前記基板保管器を一時的に保管可能な基板保管器保管棚と、
該基板保管器保管棚に保管された前記基板保管器の内部にパージガスを供給可能な第1のパージガス供給手段と、
該第1のパージガス供給手段から前記基板保管器の内部に供給された前記パージガスの積算流量を取得する積算流量取得手段と、
前記基板保管器搬送領域内で前記基板保管器を搬送可能な搬送手段と、
前記基板保管器搬送領域内の前記隔壁と隣接した所定箇所に設けられ、前記基板保管器を前記基板搬送領域に移送するために載置する移送載置部と、
前記移送載置部に載置された前記基板保管器の内部にパージガスを供給可能な第2のパージガス供給手段と、
前記移送載置部に載置された前記基板保管器を前記隔壁に密着させた状態で前記基板保管器を開放し、前記基板を前記基板搬送領域内に移送する基板移送手段と、
予め設定された前記基板保管器内の所定の酸素濃度初期値と、前記積算流量取得手段により取得された前記パージガスの積算流量と、前記第1のパージガス供給手段からの前記パージガスの供給停止時間及び前記基板保管器の前記基板保管器保管棚から前記基板搬送領域への移動時間中の前記パージガスの供給が無い時間とに基づいて前記移送載置部に載置された前記基板保管器の内部の酸素濃度を推定し、該酸素濃度が所定の閾値以下の場合には、前記基板移送手段に前記基板を前記基板搬送領域に移送させ、前記酸素濃度が前記所定の閾値を超えている場合には、前記第2のパージガス供給手段に前記基板保管器の内部に前記パージガスを供給させ、前記基板保管器の内部の前記酸素濃度が前記所定の閾値以下になってから前記基板移送手段に前記基板を前記基板搬送領域に移送させる制御手段と、を有し、
前記制御手段は、取得した前記積算流量に基づいて、前記基板保管器保管棚に保管された前記基板保管器の内部の前記酸素濃度が所定の第2の閾値に到達したと判定したときに、前記第1のパージガス供給手段からの前記パージガスの供給を停止させる制御を行い、
前記第2の閾値は、予め測定した前記パージガスの供給を継続しても酸素濃度がそれ以上低下しない限界値に設定されている。
5、5a〜5c、20 基板保管器仮棚
6 基板支持具
7 熱処理炉
8 FIMSポート
8a 載置台
16 移載機構
19 開閉扉
21 基板保管器トランスファ
22 制御部
22a 時間計測部
22b 積算流量算出部
51、81 パージガス供給管
52、82 排気管
52、83 基板保管器検知スイッチ
55、85 制御弁
56、86 流量調整器
57、87 パージガス供給源
58、88 真空ポンプ
100 熱処理装置
Claims (17)
- 第1の酸素濃度を有し、基板を露出させた状態で搬送可能な基板搬送領域と、
該基板搬送領域に隔壁を介して隣接して設けられるとともに、前記第1の酸素濃度よりも高い第2の酸素濃度を有し、前記基板を基板保管器内に保持した状態で搬送可能な基板保管器搬送領域と、
該基板保管器搬送領域内に設けられ、前記基板保管器を一時的に保管可能な基板保管器保管棚と、
該基板保管器保管棚に保管された前記基板保管器の内部にパージガスを供給可能な第1のパージガス供給手段と、
該第1のパージガス供給手段から前記基板保管器の内部に供給された前記パージガスの積算流量を取得する積算流量取得手段と、
前記基板保管器搬送領域内で前記基板保管器を搬送可能な搬送手段と、
前記基板保管器搬送領域内の前記隔壁と隣接した所定箇所に設けられ、前記基板保管器を前記基板搬送領域に移送するために載置する移送載置部と、
前記移送載置部に載置された前記基板保管器の内部にパージガスを供給可能な第2のパージガス供給手段と、
前記移送載置部に載置された前記基板保管器を前記隔壁に密着させた状態で前記基板保管器を開放し、前記基板を前記基板搬送領域内に移送する基板移送手段と、
予め設定された前記基板保管器内の所定の酸素濃度初期値と、前記積算流量取得手段により取得された前記パージガスの積算流量と、前記第1のパージガス供給手段からの前記パージガスの供給停止時間及び前記基板保管器の前記基板保管器保管棚から前記基板搬送領域への移動時間中の前記パージガスの供給が無い時間とに基づいて前記移送載置部に載置された前記基板保管器の内部の酸素濃度を推定し、該酸素濃度が所定の閾値以下の場合には、前記基板移送手段に前記基板を前記基板搬送領域に移送させ、前記酸素濃度が前記所定の閾値を超えている場合には、前記第2のパージガス供給手段に前記基板保管器の内部に前記パージガスを供給させ、前記基板保管器の内部の前記酸素濃度が前記所定の閾値以下になってから前記基板移送手段に前記基板を前記基板搬送領域に移送させる制御手段と、を有し、
前記制御手段は、取得した前記積算流量に基づいて、前記基板保管器保管棚に保管された前記基板保管器の内部の前記酸素濃度が所定の第2の閾値に到達したと判定したときに、前記第1のパージガス供給手段からの前記パージガスの供給を停止させる制御を行い、
前記第2の閾値は、予め測定した前記パージガスの供給を継続しても酸素濃度がそれ以上低下しない限界値に設定されている基板処理装置。 - 前記所定の閾値は、前記第1の酸素濃度よりも高いが、前記基板保管器を開放しても、前記基板搬送領域の前記第1の酸素濃度を、前記基板の表面に自然酸化膜が形成される濃度にまでは変化させない濃度に設定されている請求項1に記載の基板処理装置。
- 前記積算流量取得手段は、前記制御手段内に設けられ、
前記制御手段は、前記第1のパージガス供給手段と、前記搬送手段の動作も制御する請求項1又は2に記載の基板処理装置。 - 前記基板保管器保管棚に前記基板保管器が保管されたことを検出する基板保管器保管検出手段を更に有し、
該基板保管器保管検出手段により前記基板保管器の保管が検出されたときに、前記制御手段は、前記第1のパージガス供給手段に前記パージガスの供給を開始させる請求項3に記載の基板処理装置。 - 前記所定の閾値と前記第2の閾値は、同じ濃度に設定されている請求項1乃至4のいずれか一項に記載の基板処理装置。
- 前記移送載置部に前記基板保管器が載置されたことを検出する基板保管器載置検出手段を更に有し、
前記制御手段は、該基板保管器載置検出手段により前記基板保管器の載置が検出されたときに、前記酸素濃度の推定を行う請求項1乃至5のいずれか一項に記載の基板処理装置。 - 前記制御手段は、予め測定した前記基板保管器保管棚における前記第1のパージガス供給手段からの前記パージガスの供給による酸素置換特性、前記パージガスの供給したときの酸素濃度保持特性、前記移送載置部における前記第2のパージガス供給手段からの前記パージガスの供給による酸素置換特性に基づいて、前記基板保管器の内部の前記酸素濃度を推定する請求項1乃至6のいずれか一項に記載の基板処理装置。
- 前記第1のパージガス供給手段からの前記パージガスの供給による酸素置換特性、前記パージガスの供給を停止したときの酸素濃度保持特性、前記移送載置部における前記第2のパージガス供給手段からの前記パージガスの供給による酸素置換特性は、横軸を時間、縦軸を酸素濃度とする特性である請求項7に記載の基板処理装置。
- 前記パージガスは窒素ガスである請求項1乃至8のいずれか一項に記載の基板処理装置。
- 前記基板保管器保管棚は、複数個設けられている請求項1乃至9のいずれか一項に記載の基板処理装置。
- 前記基板保管器は、前面に開閉可能な蓋が設けられ、複数枚の基板を収納可能なFOUPであり、
前記基板移送手段は、該蓋を開放することにより前記基板保管器を開放する請求項1乃至10のいずれか一項に記載の基板処理装置。 - 前記基板搬送領域には、前記基板を処理する処理容器が設けられた請求項1乃至11のいずれか一項に記載の基板処理装置。
- 前記処理容器は、熱処理を行う反応管であり、
前記基板搬送領域には、該反応管に複数の基板を保持した状態で収容可能な基板保持具が設けられ、
前記基板移送手段は、前記基板を前記基板保管器から該基板保持具に移載するように構成された請求項12に記載の基板処理装置。 - 基板を収納した基板保管器を、基板保管器搬送領域内に設けられた基板保管器保管棚に一時的に保管する工程と、
該基板保管器保管棚に保管された前記基板保管器の内部にパージガスを供給する工程と、
前記基板保管器の内部に供給された該パージガスの積算流量を算出する工程と、
前記基板を露出した状態で搬送可能な基板搬送領域に移送するため、前記基板を、前記基板搬送領域と前記基板保管器搬送領域とを仕切る隔壁に隣接して設けられた前記基板保管器搬送領域内の移送載置部に載置する工程と、
該移送載置部に載置された前記基板保管器の内部の酸素濃度を、予め設定された前記基板保管器内の所定の酸素濃度初期値と、前記パージガスの積算流量と、前記パージガスの供給停止時間及び前記基板保管器の前記基板保管器保管棚から前記基板搬送領域への移動時間中の前記パージガスの供給が無い時間とに基づいて推定し、前記酸素濃度が所定の閾値以下の場合には、前記基板保管器を前記隔壁に密着させた状態で開放させて前記基板を前記基板搬送領域内に移送し、前記酸素濃度が前記所定の閾値を超える場合には、前記基板保管器の内部に前記パージガスを供給し、前記基板保管器の内部の前記酸素濃度が前記所定の閾値以下となってから前記基板を前記基板搬送領域に移送する工程と、を有し、
前記基板を収納した前記基板保管器を前記基板保管器保管棚に一時的に保管する工程は、前記基板保管器保管棚に保管された前記基板保管器の内部の前記酸素濃度が所定の第2の閾値に到達したと判定したときに、前記パージガスの供給を停止する工程を含み、
前記第2の閾値は、予め測定した前記パージガスの供給を継続しても酸素濃度がそれ以上低下しない限界値に設定されている基板移送方法。 - 前記所定の閾値は、前記基板搬送領域内の酸素濃度よりも高いが、前記基板保管器を開放しても、前記基板搬送領域内の酸素濃度を、前記基板の表面に自然酸化膜が形成される濃度にまでは変化させない濃度に設定されている請求項14に記載の基板移送方法。
- 前記移送載置部に載置された前記基板保管器の内部の前記酸素濃度は、予め測定した前記基板保管器保管棚における前記パージガスの供給による酸素置換特性、前記パージガスの供給を停止したときの酸素濃度保持特性、前記移送載置部における前記パージガスの供給による酸素置換特性に基づいて推定する請求項14又は15に記載の基板移送方法。
- 前記基板保管器保管棚における前記パージガスの供給による酸素置換特性、前記パージガスの供給を停止したときの酸素濃度保持特性、前記移送載置部における前記パージガスの供給による酸素置換特性は、横軸を時間、縦軸を酸素濃度とする特性である請求項16に記載の基板移送方法。
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