JP6800800B2 - 成長速度測定装置および成長速度検出方法 - Google Patents
成長速度測定装置および成長速度検出方法 Download PDFInfo
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- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N2021/4126—Index of thin films
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- H01L22/10—Measuring as part of the manufacturing process
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Description
予め求められた前記反射率のモデル関数を、前記基板上に順次積層される薄膜のうち少なくとも1層について、屈折率と、成長速度との少なくとも一方をフィッティングパラメータとして、前記反射率の計測値にフィッティングするフィッティング部と、
前記複数の波長のそれぞれについて、前記反射率のモデル関数と前記反射率の計測値との誤差が極小になるときの前記フィッティングパラメータを抽出するパラメータ抽出部と、
前記複数の波長のそれぞれについて抽出された前記フィッティングパラメータの中から、前記フィッティングパラメータの最適値を選定するパラメータ選定部と、を備える、成長速度測定装置が提供される。
前記パラメータ選定部は、前記第1フィッティングパラメータと、前記第2フィッティングパラメータとが一致したときの前記フィッティングパラメータを最適値としてもよい。
前記複数の波長における前記反射率をそれぞれ計測した結果に基づいて、前記基板上に積層される薄膜のうち少なくとも1層について、屈折率と成長速度との少なくとも一方を含むパラメータの最適値を選定する成長速度計測方法が提供される。
以下、本実施形態の基本原理を説明する。表面が鏡面である基板の表面上に、1層または複数の薄膜を形成する過程で、任意の波長の光を薄膜の表面に照射すると、薄膜表面からの反射光と基板の表面からの反射光とが干渉を起こして、干渉光の反射率は時間に応じて変化する。反射率が変化する周期は、薄膜に照射させた光の波長によって異なる。より具体的には、干渉光の周期は、2nd/λで表される。nは薄膜の屈折率、dは薄膜の膜厚、λは照射する光の波長である。
上述したように、本実施形態による成長速度測定装置21は、図1の制御部11に内蔵することができる。この場合、制御部11は、ハードウェア構成として成長速度測定装置21を備えていてもよいし、ソフトウェア処理によって成長速度測定装置21の機能を実現してもよい。
Claims (5)
- それぞれ異なる複数の波長の光を基板の表面に照射し、前記基板の表面の反射率をそれぞれ計測する反射率計と、
予め求められた前記反射率の時間変化を示すモデル関数を、前記基板上に順次積層される薄膜のうち少なくとも1層について、屈折率と成長速度との少なくとも一方をフィッティングパラメータとして、前記反射率の時間変化の計測値にフィッティングするフィッティング部と、
前記複数の波長のそれぞれについて、前記モデル関数と前記計測値との誤差が極小になるときの前記フィッティングパラメータを抽出するパラメータ抽出部と、
前記複数の波長のそれぞれについて抽出された前記フィッティングパラメータの中から、前記フィッティングパラメータの最適値を選定するパラメータ選定部と、を備える、成長速度測定装置。 - 前記パラメータ選定部は、
前記複数の波長のそれぞれについて抽出された前記フィッティングパラメータが一致したときの前記フィッティングパラメータを最適値とする、請求項1に記載の成長速度測定装置。 - 前記パラメータ抽出部は、前記複数の波長の中の第1波長についてのフィッティングでの前記誤差が極小になるときの第1フィッティングパラメータを抽出し、前記第1フィッティングパラメータに基づく前記第1波長と異なる第2波長についてのフィッティングでの前記誤差が極小になるときの第2フィッティングパラメータを抽出し、
前記パラメータ選定部は、前記第1フィッティングパラメータと、前記第2フィッティングパラメータとが一致したときの前記フィッティングパラメータを最適値とする、請求項1または2に記載の成長速度測定装置。 - 前記パラメータ抽出部は、前記パラメータ選定部にて前記フィッティングパラメータが選定されるまで、前記第1波長についてのフィッティングと、前記第2波長についてのフィッティングとを繰り返す、請求項3に記載の成長速度測定装置。
- それぞれ異なる複数の波長を基板の表面に照射し、前記基板の表面の反射率の時間変化をそれぞれ計測し、
前記複数の波長における前記反射率の時間変化をそれぞれ計測した結果に基づいて、前記基板上に積層される薄膜のうちの少なくとも1層について、屈折率と、成長速度との少なくとも一方を含むパラメータの最適値を選定する、成長速度計測方法。
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JP2017076216A JP6800800B2 (ja) | 2017-04-06 | 2017-04-06 | 成長速度測定装置および成長速度検出方法 |
TW107111266A TWI667447B (zh) | 2017-04-06 | 2018-03-30 | Growth rate measuring device and growth rate detecting method |
KR1020180038538A KR102283184B1 (ko) | 2017-04-06 | 2018-04-03 | 성장 속도 측정 장치 및 성장 속도 검출 방법 |
US15/946,045 US10488334B2 (en) | 2017-04-06 | 2018-04-05 | Growth-rate measuring apparatus and growth-rate detection method |
DE102018205188.7A DE102018205188A1 (de) | 2017-04-06 | 2018-04-06 | Wachstumsratenmessvorrichtung und Wachstumsratenmessverfahren |
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JP7283901B2 (ja) * | 2018-12-27 | 2023-05-30 | 株式会社Screenホールディングス | 熱処理方法および熱処理装置 |
US11022428B2 (en) | 2019-03-14 | 2021-06-01 | Nuflare Technology, Inc. | Growth rate detection apparatus, vapor deposition apparatus, and vapor deposition rate detection method |
JP7141044B2 (ja) * | 2019-05-15 | 2022-09-22 | 株式会社デンソー | 膜厚測定方法 |
US20220154339A1 (en) * | 2020-11-19 | 2022-05-19 | Korea Institute Of Science And Technology | Thin film deposition apparatus mountable with analysis system |
EP4123061A1 (en) * | 2021-07-22 | 2023-01-25 | Siltronic AG | Method for producing a gallium oxide layer on a substrate |
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JP6591377B2 (ja) | 2015-10-08 | 2019-10-16 | 株式会社ニューフレアテクノロジー | 気相成長速度測定装置、気相成長装置および成長速度検出方法 |
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