JP2007250902A5 - - Google Patents

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JP2007250902A5
JP2007250902A5 JP2006073375A JP2006073375A JP2007250902A5 JP 2007250902 A5 JP2007250902 A5 JP 2007250902A5 JP 2006073375 A JP2006073375 A JP 2006073375A JP 2006073375 A JP2006073375 A JP 2006073375A JP 2007250902 A5 JP2007250902 A5 JP 2007250902A5
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基板処理装置の処理室内において被処理基板を処理する過程で,前記基板処理装置の運転データから処理結果を予測する予測方法であって,
前記被処理基板の処理ごとに得られる運転データとその被処理基板の状態を測定して得られる処理結果データを収集するデータ収集工程と,
前記データ収集工程にて収集した前記処理結果データを用いて,予め設定されたデータ数の移動平均を求めて移動平均処理結果データを得る移動平均処理工程と,
前記データ収集工程にて収集した前記運転データと前記移動平均処理工程にて得た前記移動平均処理結果データを用いて多変量解析を行い,前記運転データと前記移動平均処理結果データとの相関関係を求める解析工程と,
前記解析工程にて求めた前記相関関係に基づいて,この相関関係を求めたときの被処理基板以外の被処理基板を処理した際に得られる運転データから処理結果を予測する予測工程と,
を有すること特徴とする基板処理装置の処理結果の予測方法。
A method for predicting a processing result from operation data of the substrate processing apparatus in a process of processing a substrate to be processed in a processing chamber of the substrate processing apparatus,
A data collection step for collecting operation data obtained for each processing of the substrate to be processed and processing result data obtained by measuring the state of the substrate to be processed;
Using the processing result data collected in the data collection step, a moving average processing step of obtaining a moving average processing result data by obtaining a moving average of a preset number of data;
Multivariate analysis is performed using the operation data collected in the data collection step and the moving average processing result data obtained in the moving average processing step, and a correlation between the operation data and the moving average processing result data An analysis process for obtaining
Based on the correlation obtained in the analysis step, a prediction step for predicting a processing result from operation data obtained when processing a substrate to be processed other than the substrate to be processed when the correlation is obtained;
A method for predicting a processing result of a substrate processing apparatus, comprising:
前記移動平均処理工程は,前記処理結果データに前記基板処理装置のメンテナンス前後の処理結果データが含まれる場合は,前記メンテナンスで区切られる区間ごとに処理結果データをグループ分けし,
前記グループごとに,そのグループに属する処理結果データのみを用いて,予め設定されたデータ数の移動平均を求めて移動平均処理結果データを得ることを特徴とする請求項1に記載の基板処理装置の処理結果の予測方法。
In the moving average processing step, when the processing result data includes processing result data before and after maintenance of the substrate processing apparatus, the processing result data is grouped into sections divided by the maintenance,
2. The substrate processing apparatus according to claim 1, wherein, for each group, the moving average processing result data is obtained by obtaining a moving average of a preset number of data using only the processing result data belonging to the group. Method of predicting the processing result .
前記移動平均処理工程は,前記グループごとに,着目する処理結果データを1個ずつずらしながら,前記着目する処理結果データに対応する移動平均処理結果データを算出することを特徴とする請求項2に記載の基板処理装置の処理結果の予測方法。 The moving average processing step calculates moving average processing result data corresponding to the focused processing result data while shifting the focused processing result data one by one for each group. A method for predicting a processing result of the described substrate processing apparatus. 前記移動平均処理工程は,
前記着目する処理結果データ以前のデータ数が前記予め設定されたデータ数になるまでは,前記着目する処理結果データ以前のすべての処理結果データを用いて平均値を求め,その平均値を前記着目する処理結果データに対応する移動平均処理結果データとし,
前記着目する処理結果データ以前のデータ数が前記予め設定されたデータ数以上になると,前記着目する処理結果データ以前の直近の処理結果データを前記予め設定されたデータ数だけ用いてこれらのデータの平均値を求め,その平均値を前記着目する処理結果データに対応する移動平均処理結果データとすることを特徴とする請求項3に記載の基板処理装置の処理結果の予測方法。
The moving average processing step includes
Until the number of data before the target processing result data reaches the preset number of data, an average value is obtained using all the processing result data before the target processing result data, and the average value is calculated as the target value. The moving average processing result data corresponding to the processing result data to be
When the number of data before the target processing result data is equal to or greater than the preset number of data, the most recent processing result data before the target processing result data is used by the preset number of data. 4. The method for predicting a processing result of a substrate processing apparatus according to claim 3, wherein an average value is obtained and the average value is used as moving average processing result data corresponding to the processing result data of interest.
移動平均を求めるための前記データ数は,前記グループごとに予め設定されることを特徴とする請求項4に記載の基板処理装置の処理結果の予測方法。 5. The method for predicting a processing result of a substrate processing apparatus according to claim 4, wherein the number of data for obtaining a moving average is preset for each group. 移動平均を求めるための前記データ数は,前記各グループに属する前記処理結果データの数に応じて予め設定されることを特徴とする請求項5に記載の基板処理装置の処理結果の予測方法。 6. The method for predicting a processing result of a substrate processing apparatus according to claim 5, wherein the number of data for obtaining a moving average is preset according to the number of the processing result data belonging to each group. 移動平均を求めるための前記データ数は,2個〜10個のいずれかであることを特徴とする請求項5又は6に記載の基板処理装置の処理結果の予測方法。 The method for predicting a processing result of a substrate processing apparatus according to claim 5 or 6, wherein the number of data for obtaining a moving average is any of 2 to 10. 前記処理結果を管理するために処理結果の目標値を中心に一定の幅で設定される管理値範囲と,前記管理値範囲の上限の閾値を中心に一定の幅で設定される上限予測誤差範囲と,前記管理値範囲の下限の閾値を中心に一定の幅で設定される下限予測誤差範囲と,
前記上限予測誤差範囲の下限の閾値と,前記上限予測誤差範囲の上限の閾値とで挟まれる範囲を予測許容範囲としたときに,前記予測工程にて得られた前記被処理基板の状態の予測値が,前記予測許容範囲内にある場合は,前記被処理基板の状態は正常であると判断し,
前記予測値が前記予測許容範囲を外れていても,前記上限予測誤差範囲又は前記下限予測誤差範囲に含まれる場合には,前記被処理基板の状態は前記被処理基板を測定して得られるその実測値に基づいて判断し,
前記予測値が前記予測許容範囲を外れており,さらに前記上限予測誤差範囲又は前記下限予測誤差範囲からも外れている場合は,前記被処理基板の状態は正常でないと判断することを特徴とする請求項1〜7のいずれかに記載の基板処理装置の処理結果の予測方法。
In order to manage the processing result, a management value range set with a constant width around the target value of the processing result, and an upper limit prediction error range set with a constant width around the upper limit threshold of the management value range And a lower limit prediction error range set with a constant width around the lower limit threshold of the control value range,
Prediction of the state of the substrate to be processed obtained in the prediction step when a range between the lower limit threshold of the upper limit prediction error range and the upper limit threshold of the upper limit prediction error range is a prediction allowable range When the value is within the predicted allowable range, it is determined that the state of the substrate to be processed is normal,
Even if the predicted value is out of the prediction allowable range, if it is included in the upper limit prediction error range or the lower limit prediction error range, the state of the substrate to be processed is obtained by measuring the substrate to be processed. Judgment based on actual measurements,
When the predicted value is out of the prediction allowable range and further out of the upper limit prediction error range or the lower limit prediction error range, it is determined that the state of the substrate to be processed is not normal. A method for predicting a processing result of the substrate processing apparatus according to claim 1.
前記各予測誤差範囲は,前記予測値の実測値に対する標準誤差に応じて設定されることを特徴とする請求項8に記載の基板処理装置の予測方法。 9. The prediction method for a substrate processing apparatus according to claim 8, wherein each prediction error range is set according to a standard error with respect to an actual measurement value of the prediction value. 前記予測値は,前記被処理基板の加工寸法であることを特徴とする請求項8又は9に記載の基板処理装置の処理結果の予測方法。 The method for predicting a processing result of a substrate processing apparatus according to claim 8, wherein the predicted value is a processing dimension of the substrate to be processed. 前記処理結果データは,前記被処理基板の加工寸法であることを特徴とする請求項1〜10のいずれかに記載の基板処理装置の処理結果の予測方法。 The method for predicting a processing result of a substrate processing apparatus according to claim 1, wherein the processing result data is a processing dimension of the substrate to be processed. 前記運転データは,前記基板処理装置に備えられた複数の検出器から得られる電気的データであることを特徴とする請求項1〜11のいずれかに記載の基板処理装置の処理結果の予測方法。 12. The method for predicting a processing result of a substrate processing apparatus according to claim 1, wherein the operation data is electrical data obtained from a plurality of detectors provided in the substrate processing apparatus. . 前記解析工程は,前記多変量解析として部分最小二乗法を用いることを特徴とする請求項1〜12のいずれかに記載の基板処理装置の処理結果の予測方法。 The method of predicting a processing result of a substrate processing apparatus according to claim 1, wherein the analysis step uses a partial least square method as the multivariate analysis. 基板処理装置の処理室内において被処理基板を処理する過程で,前記基板処理装置の運転データから処理結果を予測する予測装置であって,
前記被処理基板の処理ごとに得られる運転データとその被処理基板の状態を測定して得られる処理結果データを収集するデータ収集手段と,
前記データ収集手段が収集した前記処理結果データを用いて,予め設定されたデータ数の移動平均を求めて移動平均処理結果データを得る移動平均処理手段と,
前記データ収集手段が収集した前記運転データと前記移動平均処理手段が得た前記移動平均処理結果データを用いて多変量解析を行い,前記運転データと前記移動平均処理結果データとの相関関係を求める解析手段と,
前記解析手段が求めた前記相関関係に基づいて,この相関関係を求めたときの被処理基板以外の被処理基板を処理した際に得られる運転データから処理結果を予測する予測手段と,
を有すること特徴とする基板処理装置の処理結果の予測装置。
A prediction device for predicting a processing result from operation data of the substrate processing apparatus in a process of processing a substrate to be processed in a processing chamber of the substrate processing apparatus,
Data collection means for collecting operation data obtained for each processing of the substrate to be processed and processing result data obtained by measuring the state of the substrate to be processed;
Using the processing result data collected by the data collection means, moving average processing means for obtaining a moving average processing result data by obtaining a moving average of a preset number of data;
A multivariate analysis is performed using the driving data collected by the data collecting means and the moving average processing result data obtained by the moving average processing means, and a correlation between the driving data and the moving average processing result data is obtained. Analysis means;
A predicting means for predicting a processing result from operation data obtained when processing a substrate to be processed other than the substrate to be processed when the correlation is obtained based on the correlation obtained by the analyzing means;
An apparatus for predicting a processing result of a substrate processing apparatus, comprising:
前記移動平均処理手段は,前記処理結果データに前記基板処理装置のメンテナンス前後の処理結果データが含まれる場合は,前記メンテナンスで区切られる区間ごとに処理結果データをグループ分けし,
前記グループごとに,そのグループに属する処理結果データのみを用いて,予め設定されたデータ数の移動平均を求めて移動平均処理結果データを得ることを特徴とする請求項14に記載の基板処理装置の処理結果の予測装置。
The moving average processing means, when the processing result data includes processing result data before and after maintenance of the substrate processing apparatus, groups the processing result data into sections divided by the maintenance;
15. The substrate processing apparatus according to claim 14, wherein, for each group, using only processing result data belonging to the group, a moving average of a preset number of data is obtained to obtain moving average processing result data. Processing result prediction device.
前記移動平均処理手段は,前記グループごとに,着目する処理結果データを1個ずつずらしながら,前記着目する処理結果データに対応する移動平均処理結果データを算出することを特徴とする請求項15に記載の基板処理装置の処理結果の予測装置。 The moving average processing means calculates moving average processing result data corresponding to the focused processing result data while shifting the focused processing result data one by one for each group. A processing result prediction apparatus of the described substrate processing apparatus. 前記移動平均処理手段は,
前記着目する処理結果データ以前のデータ数が前記予め設定されたデータ数になるまでは,前記着目する処理結果データ以前のすべての処理結果データを用いて平均値を求め,その平均値を前記着目する処理結果データに対応する移動平均処理結果データとし,
前記着目する処理結果データ以前のデータ数が前記予め設定されたデータ数以上になると,前記着目する処理結果データ以前の直近の処理結果データを前記予め設定されたデータ数だけ用いてこれらのデータの平均値を求め,その平均値を前記着目する処理結果データに対応する移動平均処理結果データとすることを特徴とする請求項16に記載の基板処理装置の処理結果の予測装置。
The moving average processing means includes
Until the number of data before the target processing result data reaches the preset number of data, an average value is obtained using all the processing result data before the target processing result data, and the average value is calculated as the target value. The moving average processing result data corresponding to the processing result data to be
When the number of data before the target processing result data is equal to or greater than the preset number of data, the most recent processing result data before the target processing result data is used as many as the preset number of data. 17. The apparatus for predicting a processing result of a substrate processing apparatus according to claim 16, wherein an average value is obtained and the average value is used as moving average processing result data corresponding to the processing result data of interest.
移動平均を求めるための前記データ数は,前記グループごとに予め設定されることを特徴とする請求項17に記載の基板処理装置の処理結果の予測装置。 The apparatus for predicting a processing result of a substrate processing apparatus according to claim 17, wherein the number of data for obtaining a moving average is preset for each group. 移動平均を求めるための前記データ数は,前記各グループに属する前記処理結果データの数に応じて予め設定されることを特徴とする請求項18に記載の基板処理装置の処理結果の予測装置。 19. The apparatus for predicting a processing result of a substrate processing apparatus according to claim 18, wherein the number of data for obtaining a moving average is preset according to the number of the processing result data belonging to each group. 移動平均を求めるための前記データ数は,2個〜10個のいずれかであることを特徴とする請求項18又は19に記載の基板処理装置の処理結果の予測装置。 20. The apparatus for predicting a processing result of a substrate processing apparatus according to claim 18, wherein the number of data for obtaining a moving average is any of 2 to 10. 前記処理結果を管理するために処理結果の目標値を中心に一定の幅で設定される管理値範囲と,前記管理値範囲の上限の閾値を中心に一定の幅で設定される上限予測誤差範囲と,前記管理値範囲の下限の閾値を中心に一定の幅で設定される下限予測誤差範囲と,
前記上限予測誤差範囲の下限の閾値と,前記上限予測誤差範囲の上限の閾値とで挟まれる範囲を予測許容範囲としたときに,前記予測工程にて得られた前記被処理基板の状態の予測値が,前記予測許容範囲内にある場合は,前記被処理基板の状態は正常であると判断し,
前記予測値が前記予測許容範囲を外れていても,前記上限予測誤差範囲又は前記下限予測誤差範囲に含まれる場合には,前記被処理基板の状態は前記被処理基板を測定して得られるその実測値に基づいて判断し,
前記予測値が前記予測許容範囲を外れており,さらに前記上限予測誤差範囲又は前記下限予測誤差範囲からも外れている場合は,前記被処理基板の状態は正常でないと判断することを特徴とする請求項14〜20のいずれかに記載の基板処理装置の処理結果の予測装置。
In order to manage the processing result, a management value range set with a constant width around the target value of the processing result, and an upper limit prediction error range set with a constant width around the upper limit threshold of the management value range And a lower limit prediction error range set with a constant width around the lower limit threshold of the control value range,
Prediction of the state of the substrate to be processed obtained in the prediction step when a range between the lower limit threshold of the upper limit prediction error range and the upper limit threshold of the upper limit prediction error range is a prediction allowable range When the value is within the predicted allowable range, it is determined that the state of the substrate to be processed is normal,
Even if the predicted value is out of the prediction allowable range, if it is included in the upper limit prediction error range or the lower limit prediction error range, the state of the substrate to be processed is obtained by measuring the substrate to be processed. Judgment based on actual measurements,
When the predicted value is out of the prediction allowable range and further out of the upper limit prediction error range or the lower limit prediction error range, it is determined that the state of the substrate to be processed is not normal. 21. A processing result prediction apparatus for a substrate processing apparatus according to claim 14.
前記各予測誤差範囲は,前記予測値の実測値に対する標準誤差に応じて設定されることを特徴とする請求項21に記載の基板処理装置の処理結果の予測装置。 The apparatus for predicting a processing result of a substrate processing apparatus according to claim 21, wherein each prediction error range is set according to a standard error with respect to an actual measurement value of the prediction value. 前記予測値は,前記被処理基板の加工寸法であることを特徴とする請求項21又は22に記載の基板処理装置の予測装置。 23. The prediction apparatus for a substrate processing apparatus according to claim 21, wherein the predicted value is a processing dimension of the substrate to be processed. 前記処理結果データは,前記被処理基板の加工寸法であることを特徴とする請求項14〜23のいずれかに記載の基板処理装置の処理結果の予測装置。 The apparatus for predicting a processing result of a substrate processing apparatus according to any one of claims 14 to 23, wherein the processing result data is a processing dimension of the substrate to be processed. 前記運転データは,前記基板処理装置に備えられた複数の検出器から得られる電気的データであることを特徴とする請求項14〜24のいずれかに記載の基板処理装置の処理結果の予測装置。 25. The apparatus for predicting processing results of a substrate processing apparatus according to claim 14, wherein the operation data is electrical data obtained from a plurality of detectors provided in the substrate processing apparatus. . 前記解析手段は,前記多変量解析として部分最小二乗法を用いることを特徴とする請求項14〜25のいずれかに記載の基板処理装置の処理結果の予測装置。 The apparatus for predicting a processing result of a substrate processing apparatus according to any one of claims 14 to 25, wherein the analyzing means uses a partial least square method as the multivariate analysis.
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