JP2013175430A - マイクロ波放射機構、マイクロ波プラズマ源および表面波プラズマ処理装置 - Google Patents
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Abstract
【解決手段】マイクロ波放射機構43は、マイクロ波を伝送する伝送路44と、マイクロ波伝送路44を伝送されてきたマイクロ波をチャンバ1内に放射するアンテナ部45とを有し、アンテナ部45は、マイクロ波を放射するスロット131が形成されたアンテナ81と、アンテナ81から放射されたマイクロ波を透過させ、その表面に表面波が形成される誘電体部材110bとを有し、かつ、少なくともスロット131内壁および誘電体部材110bの表面および内部を含む、表面電流および変位電流が流れる閉回路Cを有し、閉回路Cの長さが、マイクロ波の波長をλ0とした場合に、nλ0±δ(nは正の整数、δは微調整成分(0を含む)である)となるようにする。
【選択図】図7
Description
図1は、本発明の一実施形態に係るマイクロ波放射機構を有する表面波プラズマ処理装置の概略構成を示す断面図であり、図2は図1の表面波プラズマ処理装置に用いられるマイクロ波プラズマ源の構成を示す構成図、図3はマイクロ波プラズマ源におけるマイクロ波供給部を模式的に示す平面図、図4はマイクロ波プラズマ源におけるマイクロ波放射機構を示す断面図、図5はマイクロ波放射機構の給電機構を示す図4のAA′線による横断面図、図6はチューナにおけるスラグと滑り部材を示す図4のBB′線による横断面図である。
図4、5に示すように、マイクロ波放射機構43は、マイクロ波を伝送する同軸構造の導波路(マイクロ波伝送路)44と、導波路44を伝送されたマイクロ波をチャンバ1内に放射するアンテナ部45とを有している。そして、マイクロ波放射機構43からチャンバ1内に放射されたマイクロ波がチャンバ1内の空間で合成され、チャンバ1内で表面波プラズマが形成されるようになっている。
次に、以上のように構成される表面波プラズマ処理装置100における動作について説明する。
まず、ウエハWをチャンバ1内に搬入し、サセプタ11上に載置する。そして、プラズマガス供給源27から配管28およびプラズマガス導入部材26を介してチャンバ1内にプラズマガス、例えばArガスを導入しつつ、マイクロ波プラズマ源2からマイクロ波をチャンバ1内に伝送して表面波プラズマを生成する。
ここで、ωはマイクロ波の周波数であり、ωpeはプラズマ中の電子の振動周波数である。
なお、本発明は上記実施形態に限定されることなく、本発明の思想の範囲内において種々変形可能である。例えば、マイクロ波出力部30やマイクロ波供給部40の構成等は、上記実施形態に限定されるものではなく、例えば、アンテナから放射されるマイクロ波の指向性制御を行ったり円偏波にしたりする必要がない場合には、位相器は不要である。また、マイクロ波放射機構43において、遅波材82は必須ではない。
2;マイクロ波プラズマ源
11;サセプタ
12;支持部材
15;排気管
16;排気装置
17;搬入出口
20;シャワープレート
30;マイクロ波出力部
31;マイクロ波電源
32;マイクロ波発振器
40;マイクロ波供給部
41;アンテナモジュール
42;アンプ部
43;マイクロ波放射機構
44;導波路
45;アンテナ部
52;外側導体
53;内側導体
54;給電機構
55;マイクロ波電力導入ポート
56;同軸線路
58;反射板
60;チューナ
81;平面スロットアンテナ
82;遅波材
100;表面波プラズマ処理装置
110;天板
110b;誘電体部材
120;制御部
131;スロット
C;閉回路
W;半導体ウエハ
Claims (8)
- チャンバ内に表面波プラズマを形成してプラズマ処理を行うプラズマ処理装置において、マイクロ波生成機構で生成されたマイクロ波をチャンバ内に放射するマイクロ波放射機構であって、
筒状をなす外側導体とその中に同軸的に設けられた内側導体とを有しマイクロ波を伝送する伝送路と、
前記マイクロ波伝送路を伝送されてきたマイクロ波を前記チャンバ内に放射するアンテナ部と
を具備し、
前記アンテナ部は、マイクロ波を放射するスロットが形成されたアンテナと、前記アンテナから放射されたマイクロ波を透過させ、その表面に表面波が形成される誘電体部材とを有し、かつ、少なくとも前記スロット内壁および前記誘電体部材の表面および内部を含む、表面電流および変位電流が流れる閉回路を有し、前記閉回路の長さが、マイクロ波の波長をλ0とした場合に、nλ0±δ(nは正の整数、δは微調整成分(0を含む)である)となるようにすることを特徴とするマイクロ波放射機構。 - 前記閉回路の長さがnλ0±δとなるように前記スロットの厚さを規定することを特徴とする請求項1に記載のマイクロ波放射機構。
- 前記スロットには誘電体が充填されていることを特徴とする請求項1または請求項2に記載のマイクロ波放射機構。
- 前記誘電体部材の厚さを相対的に薄く維持したまま、前記閉回路の長さがnλ0±δとなるように、前記スロットの厚さを相対的に厚くすることを特徴とする請求項1から請求項3のいずれか1項に記載のマイクロ波放射機構。
- マイクロ波を生成するマイクロ波生成機構および生成されたマイクロ波をチャンバ内に放射するマイクロ波放射機構を有し、前記チャンバ内にマイクロ波を放射して前記チャンバ内に供給されたガスによる表面波プラズマを生成するマイクロ波プラズマ源であって、
前記マイクロ波放射機構として、請求項1から請求項4のいずれかに記載のものを用いることを特徴とするマイクロ波プラズマ源。 - 複数の前記マイクロ波放射機構を有することを特徴とする請求項5に記載のマイクロ波プラズマ源。
- 被処理基板を収容するチャンバと、
前記チャンバ内にガスを供給するガス供給機構と、
マイクロ波を生成するマイクロ波生成機構および生成されたマイクロ波を前記チャンバ内に放射するマイクロ波放射機構を有し、前記チャンバ内にマイクロ波を放射して前記チャンバ内に供給されたガスによる表面波プラズマを生成するマイクロ波プラズマ源と
を具備し、
前記チャンバ内の被処理基板に対して前記表面波プラズマにより処理を施す表面波プラズマ処理装置であって、
前記マイクロ波放射機構として、請求項1から請求項4のいずれかに記載のものを用いることを特徴とする表面波プラズマ処理装置。 - 前記マイクロ波プラズマ源は、複数の前記マイクロ波放射機構を有することを特徴とする請求項7に記載の表面波プラズマ処理装置。
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JP2012204568A JP6010406B2 (ja) | 2012-01-27 | 2012-09-18 | マイクロ波放射機構、マイクロ波プラズマ源および表面波プラズマ処理装置 |
KR1020147023798A KR101711713B1 (ko) | 2012-01-27 | 2012-12-14 | 마이크로파 방사 기구, 마이크로파 플라즈마원 및 표면파 플라즈마 처리 장치 |
PCT/JP2012/082496 WO2013111474A1 (ja) | 2012-01-27 | 2012-12-14 | マイクロ波放射機構、マイクロ波プラズマ源および表面波プラズマ処理装置 |
US14/373,589 US9520272B2 (en) | 2012-01-27 | 2012-12-14 | Microwave emission mechanism, microwave plasma source and surface wave plasma processing apparatus |
TW102101628A TWI584340B (zh) | 2012-01-27 | 2013-01-16 | Microwave radiation mechanism, microwave plasma source and surface wave plasma processing device |
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JP2017004641A (ja) * | 2015-06-05 | 2017-01-05 | 東京エレクトロン株式会社 | マイクロ波プラズマ源およびプラズマ処理装置 |
KR101774164B1 (ko) | 2015-07-31 | 2017-09-01 | 도쿄엘렉트론가부시키가이샤 | 마이크로파 플라즈마원 및 플라즈마 처리 장치 |
KR20230114198A (ko) | 2022-01-24 | 2023-08-01 | 도쿄엘렉트론가부시키가이샤 | 플라스마 처리 장치 |
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