JP2009506496A - 放電プラズマを発生させ制御するための方法及び構成 - Google Patents
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Abstract
Description
プラズマがオフの場合に、インピーダンスの変化によって電流共振周波数がプラズマ特性周波数と同じ程度の値に変化し、
APG等価容量がCpulseと同程度である場合は、飽和チョーク21によって発生する電圧が高められたパルスもまた電流共振の帯域内の周波数を有し、プラズマ電流共振が引き起こされ、
大きな電流によってAPGプラズマ上の電圧が減少する。
APG容量の大きさと同程度のパルスシステム容量、
Cparallel>CAPG、
Lsaturated<Lchoke(これはチョーク21のフェライトコアの選択のための条件である)、
Lsaturated×Cpulse<10−12s2、
ω2 plasmaLsaturated(CAPG+Cpulse)=1、
チョーク飽和と大きなインダクタンス減少を達成するためにω2LchokeCpulse>2〜3、又は、チョークインピーダンスが主に抵抗である超強力な飽和共振の場合はω2LchokeCpulse=1、
である。
1/ω(Cpulse+Cres)<<Rrlc
が要求される。
Isat=0.8UbrωC
となる。
[実施例]
Claims (23)
- 少なくとも2つの一定の間隔で配置された電極(13、14)を有するプラズマ放電空間(11)の中で、ガス又はガス混合物の中で放電プラズマを発生させ制御するための方法であって、少なくとも1つの電流パルスがACプラズマ付勢電圧の前記電極(13、14)への印加によって発生し、これによりプラズマ電流及び変位電流が生じ、前記放電プラズマの制御が、低い動的抵抗対静的抵抗比を有するプラズマの変化に関連した局所的電流密度変化を制御するために変位電流変化率dI/Idtを適用するステップを含む方法。
- 変位電流変化率をプラズマパルスの少なくとも絶縁破壊時に適用するステップを含む請求項1に記載の方法。
- 変位電流変化率を少なくともプラズマパルスの絶縁破壊時及びプラズマパルスのカットオフ時に適用するステップを含む請求項1に記載の方法。
- 変位電流の変化が、印加電圧の変化率dV/Vdtを前記2つの電極(13、14)に適用することによってもたらされ、前記印加電圧の変化が、ACプラズマ付勢電圧の動作周波数に概ね等しく、変位電流変化率dI/Idtが、前記印加電圧変化率dV/Vdtよりも少なくとも5倍大きい値を有する請求項1〜3のいずれかに記載の方法。
- プラズマの制御が、マッチングインダクタンス(Lmatching)及び、2つの電極(13、14)と放電空間(11)とによって形成されるシステム容量を備えたLCマッチング回路並びに前記電極(13、14)の少なくとも1つに直列であるパルス形成回路(20)よって得られる請求項1〜4のいずれかに記載の方法。
- LCマッチング回路が、ACプラズマ付勢電圧の動作周波数にほぼ等しい共振周波数を有する請求項5に記載の方法。
- 少なくとも2つの一定の間隔で配置された電極(13、14)と、ガス又はガス混合物を放電空間(11)の中に注入するための手段(12)と、少なくとも1つの電流パルスを発生させプラズマ電流及び変位電流を引き起こすために前記電極(13、14)にACプラズマ付勢電圧を印加することによって前記電極(13、14)を付勢するための電源(15)と、前記プラズマを制御するための手段とを有する、放電空間(11)の中に放電プラズマを発生させ制御するための構成であって、
前記プラズマを制御するための手段が、低い動的抵抗対静的抵抗比を有するプラズマの変化に関連した局所的電流密度変化を制御するために変位電流変化率dI/Idtを適用するようになされた構成。 - プラズマを制御するための手段が、変位電流変化率を少なくともプラズマパルスの絶縁破壊時に適用するように構成された請求項7に記載の構成。
- プラズマを制御するための手段が、変位電流変化率を少なくともプラズマパルスの絶縁破壊時及び前記プラズマパルスのカットオフ時に適用するように構成された請求項7に記載の構成。
- プラズマを制御するための手段が、印加電圧の変化率dV/Vdtを2つの電極(13、14)に適用することによって変位電流変化をもたらすようにさらに構成され、前記印加電圧変化率が、ACプラズマ付勢電圧の動作周波数に概ね等しく、変位電流変化率dI/Idtが、前記印加電圧変化率dV/Vdtよりも少なくとも5倍高い値を有する、請求項7、8又は9に記載の構成。
- プラズマを制御するための手段が、マッチングインダクタンス(Lmatching)と、2つの電極(13、14)及び放電空間(11)によって形成されるシステム容量と、前記電極(13、14)の少なくとも1つに直列なパルス形成回路(20)とによって形成されたLCマッチング回路を備えた請求項7〜10のいずれかに記載の構成。
- LCマッチング回路が、ACプラズマ付勢電圧の動作周波数にほぼ等しい共振周波数を有する請求項11に記載の構成。
- パルス形成回路(20)がコンデンサを備え、該コンデンサの容量がその大きさにおいて前記システム容量に実質的に等しい請求項11又は12に記載の構成。
- パルス形成回路(20)がチョーク(21)及び前記チョーク(21)に並列に接続されたパルスコンデンサ(22)より構成され、前記チョーク(21)が、プラズマ絶縁破壊時に実質的に飽和する寸法(長さ)を有し、前記パルス形成回路(20)が、ACプラズマ付勢電圧の動作周波数にほぼ等しい共振周波数を有する請求項11又は12に記載の構成。
- パルス形成回路(20)が、チョーク(21)及び共振器コンデンサ(24)の直列回路並びに前記直列回路に並列に接続されたパルスコンデンサ(22)より構成され、前記チョーク(21)が、プラズマ絶縁破壊時に実質的に飽和する寸法(長さ)を有し、前記パルス形成回路(20)が、ACプラズマ付勢電圧の動作周波数にほぼ等しい共振周波数を有する請求項11又は12に記載の構成。
- パルス形成回路(20)が、チョーク(21)及び共振器コンデンサ(24)の直列回路並びに前記直列回路に並列に接続されたパルスコンデンサ(22)より構成され、前記チョーク(21)が、プラズマ絶縁破壊時に実質的に飽和する寸法(長さ)を有し、前記直列回路が誘導性インピーダンスを有する請求項11又は12に記載の構成。
- LCマッチング回路が追加のマッチング回路コンデンサ(23)を備え、前記コンデンサの容量がその大きさにおいてシステム容量に実質的に等しい請求項11〜16のいずれかに記載の構成。
- ポリマー素材の表面処理のための請求項1〜6のいずれかに記載の方法の使用、又は請求項7〜17のいずれかに記載の制御構成。
- 表面処理が、プラズマ放電空間(11)の中にガス混合物を提供するステップを含み、該ガス混合物が、ネオン、ヘリウム、アルゴン、窒素又はこれらのガスの混合物を含む請求項18に記載の使用。
- ガス混合物が、NH3、O2、CO2又はこれらのガスの混合物をさらに含む請求項19に記載の使用。
- 動作周波数が、1kHzより大きく、例えば250kHzより大きく、例えば50MHzまでの周波数で使用される請求項18、19又は20に記載の使用。
- 高圧放電ランプ、UV放電ランプ又は無線周波数反応器などの放電デバイスの中のプラズマの発生を制御するための、請求項1〜6のいずれかに記載の方法の使用、又は請求項7〜17のいずれかに記載の制御構成。
- 化学的気相成長プロセスのためのプラズマの発生を制御するための請求項1〜6のいずれかに記載の方法の使用、又は請求項7〜17のいずれかに記載の制御構成。
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PCT/NL2006/050209 WO2007024134A1 (en) | 2005-08-26 | 2006-08-24 | Method and arrangement for generating and controlling a discharge plasma |
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WO2007024134A1 (en) | 2007-03-01 |
EP1917842A1 (en) | 2008-05-07 |
US20080317974A1 (en) | 2008-12-25 |
JP5367369B2 (ja) | 2013-12-11 |
EP1917842B1 (en) | 2015-03-11 |
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