JP2019523993A - プラズマ処理中に基板における電圧波形を制御するためのシステム及び方法 - Google Patents
プラズマ処理中に基板における電圧波形を制御するためのシステム及び方法 Download PDFInfo
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- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
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- 230000000903 blocking effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000012804 iterative process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
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- H—ELECTRICITY
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- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
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- H01J37/32917—Plasma diagnostics
- H01J37/32935—Monitoring and controlling tubes by information coming from the object and/or discharge
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- H—ELECTRICITY
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- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
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- H01J37/32—Gas-filled discharge tubes
- H01J37/32917—Plasma diagnostics
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- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
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- H01J2237/32—Processing objects by plasma generation
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- H01J2237/334—Etching
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- H—ELECTRICITY
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- H01J2237/32—Processing objects by plasma generation
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- H01J2237/334—Etching
- H01J2237/3341—Reactive etching
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Abstract
Description
Claims (15)
- プラズマ処理チャンバ内でプラズマ処理中に基板における電圧波形を制御する方法であって、
前記プラズマ処理チャンバ内の基板支持体に整形パルスバイアス波形を印加するステップであって、前記基板支持体は静電チャック、チャッキングポール、基板支持面及び電極を含むステップと、
前記基板支持面上に配置された基板における電圧を表す信号を捕捉するステップと、
前記捕捉された信号に基づいて前記整形パルスバイアス波形を反復的に調整するステップとを含む方法。 - 前記反復的に調整するステップは、前記基板における前記電圧を表す前記捕捉信号を評価するステップと、前記評価に応じて、前記整形パルスバイアス波形を調整して前記基板における前記電圧を一定に維持するか、又は所定の電圧レベルの許容範囲内に維持するためにバイアス供給部に印加される制御信号を生成するステップとを含む請求項1記載の方法。
- 前記整形パルスバイアス波形を前記基板支持体の前記電極に印加するステップを含む請求項1記載の方法。
- 前記整形パルスバイアス波形を前記チャッキングポールに印加するステップを含む請求項1記載の方法。
- プラズマ処理システムであって、
処理される基板を支持するための一表面を画定し、静電チャック、チャッキングポール、及び電極を含む基板支持体と、
前記基板支持面上に配置された基板における電圧を表す信号を捕捉するセンサと、
前記基板支持体に整形パルスバイアス波形を供給するバイアス供給部と、
前記センサから前記捕捉信号を受信し、前記捕捉信号に基づいて前記整形パルスバイアス波形を調整するために前記バイアス供給部に通信される制御信号を生成するコントローラとを備えるプラズマ処理システム。 - 前記センサは前記基板の少なくとも一部と接触している伝導性リード線を備える請求項5記載のプラズマ処理システム。
- 前記センサは前記電極の上方に配置された伝導体リングを備える請求項5記載のプラズマ処理システム。
- 前記伝導体リングの少なくとも一部と接触している伝導性リード線を備える請求項7記載のプラズマ処理システム。
- 前記捕捉信号を前記コントローラに送信するために、前記伝導体リングに近接した結合回路を備える請求項7記載のプラズマ処理システム。
- 前記センサは前記基板に近接した結合回路を備える請求項5記載のプラズマ処理システム。
- 前記整形パルスバイアス波形は前記基板における前記電圧を一定に、又は所定の電圧レベルの許容範囲内に維持するように反復的に調整される請求項5記載のプラズマ処理システム。
- 前記整形パルスバイアス波形は前記基板支持体の前記電極に印加される請求項5記載のプラズマ処理システム。
- 前記整形パルスバイアス波形は前記基板支持体の前記チャッキングポールに印加される請求項5記載のプラズマ処理システム。
- プラズマ処理システムであって、
静電チャック、チャッキングポール、及び電極を含み、処理される基板を支持するための一表面を画定する基板支持体であって、前記電極は誘電体層によって基板支持面から分離される前記基板支持体と、
前記基板支持面の上方に配置されたプラズマと、
整形パルスバイアス波形を前記電極に印加する整形パルスバイアス波形発生器とを備え、
前記誘電体層の厚さ及び組成は前記電極と前記基板支持面との間の誘電体層の容量が前記基板支持面と前記プラズマとの間の容量より少なくとも1桁大きいように選択されるプラズマ処理システム。 - 前記整形パルスバイアス波形及びクランプ電圧を前記基板支持体に結合するための結合回路を備える請求項14記載のプラズマ処理システム。
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US15/618,082 US20170358431A1 (en) | 2016-06-13 | 2017-06-08 | Systems and methods for controlling a voltage waveform at a substrate during plasma processing |
PCT/US2017/036981 WO2017218394A1 (en) | 2016-06-13 | 2017-06-12 | Systems and methods for controlling a voltage waveform at a substrate during plasma processing |
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