JPWO2009057583A1 - プラズマ処理システム及びプラズマ処理方法 - Google Patents
プラズマ処理システム及びプラズマ処理方法 Download PDFInfo
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Abstract
Description
2 プラズマ処理装置
3 ガス供給源
4 プラズマガス供給源
5 処理ガス供給源
10a〜16a、20a〜31a ガス配管
17、32 ガス供給管
40 制御装置
40a 流量制御装置
51 処理容器
52 載置台
61 シャワープレート
63 ラジアルラインスロットアンテナ
64 ガス供給孔
90 処理ガス供給構造体
92 開口部
93 処理ガス供給口
101 排気管
102 排気装置
103 第1の真空ポンプ
104 第2の真空ポンプ
111 排気管
201 雄ロータ
202 雌ロータ
201b 作動室
202b 作動室
203 主ケーシング
301〜304 第1のバルブ
305〜307 第2のバルブ
310〜312 排ガス処理装置
322 第3のバルブ
330、430 回収装置
500 他の排気装置
R1 プラズマ励起領域
R2 プラズマ拡散領域
Claims (28)
- 異なる組成の複数の膜を成膜又はエッチングするプラズマ処理システムであって、
高周波の供給によって発生したプラズマにより、基板に前記複数の膜の成膜を行う、又は基板上の前記複数の膜をエッチングするプラズマ処理装置と、
前記プラズマ処理装置内に前記複数の膜を成膜又はエッチングするために必要なすべてのガスを供給するガス供給源と、
前記ガス供給源から前記プラズマ処理装置に前記すべてのガスを別々に導入する複数のガス配管と、
前記プラズマ処理装置内に発生する排ガスを排気する排気装置と、
前記ガス供給源から、前記複数の膜の各膜を成膜又はエッチングするために必要なガスを前記各ガス配管を通して選択的に前記プラズマ処理装置内に供給する制御装置と、を備えている。 - 請求項1に記載のプラズマ処理システムにおいて、
前記制御装置は、前記プラズマ処理装置内に供給するガスの流量を制御する流量制御装置を含み、
前記流量制御装置は、前記プラズマ処理装置に供給されるガスの圧力を測定し、測定された圧力に基づいて供給流量を制御する。 - 請求項1に記載のプラズマ処理システムにおいて、
前記プラズマ処理装置は、
基板を収容し処理する処理容器と、
前記処理容器内において基板を載置する載置部と、
前記載置部に載置された基板に対向する位置に設けられ、前記処理容器内にプラズマ発生用の高周波を2次元的に均一に供給する高周波供給部と、
前記高周波供給部と前記載置部との間に設けられ、前記高周波供給部から前記載置台までの領域を前記高周波供給部側の領域と前記載置部側の領域に区画する板状の構造体と、
前記高周波供給部の下部であって、前記構造体の上面に対向する位置に設けられ、前記高周波供給部側の領域にプラズマを励起するためのガスを2次元的に均一に供給するプラズマガス供給部と、
前記複数のガス配管から前記プラズマガス供給部及び前記構造体にガスを供給するガス供給路と、を有し、
前記構造体には、前記載置部側の領域に前記成膜又はエッチングのための処理ガスを2次元的に均一に供給する複数の処理ガス供給口と、前記高周波供給部側の領域で2次元的に均一に生成されたプラズマが前記載置部側の領域に通過する複数の開口部が形成されている。 - 請求項3に記載のプラズマ処理システムにおいて、
前記処理容器の内表面には、水分子を含まずピンホールボイドがなく、プラズマガス及び処理ガスに対して耐食性を有するガス保護膜が形成されている。 - 請求項4に記載のプラズマ処理システムにおいて、
前記ガス保護膜は、Al2O3膜である。 - 請求項3に記載のプラズマ処理システムにおいて、
前記処理容器の内表面は、100℃〜200℃に加熱される。 - 請求項3に記載のプラズマ処理システムにおいて、
前記高周波供給部から供給される高周波の周波数は、915MHz、2.45GHzあるいは450MHzのいずれかである。 - 請求項1に記載のプラズマ処理システムにおいて、
前記排気装置の内部の圧力は、入口側から出口側に行くにつれて連続的に上昇している。 - 請求項1に記載のプラズマ処理システムにおいて、
前記排気装置の入口側と出口側の排ガスの圧力の比は、10000以上であって、かつ、出口側の排ガスの圧力は、0.4kPa〜4.0kPaである。 - 請求項1に記載のプラズマ処理システムにおいて、
前記排気装置は、
1段又は直列に接続された2段の真空ポンプを含み、
前記各段の真空ポンプは、それぞれ1個又は並列に複数配置され、
前記排気装置の出口側の排ガスの流れが粘性流である。 - 請求項10に記載のプラズマ処理システムにおいて、
前記排気装置の真空ポンプは、スクリュー真空ポンプを含み、
前記スクリュー真空ポンプは、
歯車のねじれ角度が連続的に変化する噛み合わせロータと、
前記噛み合わせロータを収納するケーシングと、を有し、
前記噛み合わせロータと前記ケーシングとにより形成される作動室の容積が、排ガスの吸引側から吐出側に進行するにつれて連続的に減少するように構成されている。 - 請求項10に記載のプラズマ処理システムにおいて、
前記排気装置の真空ポンプの内表面には、水分子を含まずピンホールボイドがなく、排ガスに対して耐食性を有する排ガス保護膜が形成されている。 - 請求項12に記載のプラズマ処理システムにおいて、
前記排ガス保護膜は、Al2O3膜又はY2O3膜である。 - 請求項10に記載のプラズマ処理システムにおいて、
前記排気装置の真空ポンプの内表面は、100℃〜200℃に加熱される。 - 請求項1に記載のプラズマ処理システムにおいて、
前記排気装置の下流側には、
前記プラズマ処理装置内で発生した異なる排ガスを処理する複数の排ガス処理装置と、
前記複数の排ガス処理装置の出口側に設けられた他の排気装置と、
前記排気装置から前記各排ガス処理装置への排ガスの流入を制御する複数の第1のバルブと、
前記各排ガス処理装置から前記他の排気装置へ処理済みの排ガスの流入を制御する複数の第2のバルブと、が設けられ、
前記プラズマ処理装置、前記排気装置、前記第1のバルブ、前記排ガス処理装置、前記第2のバルブ、前記他の排気装置は、この順でそれぞれ排気管によって接続されている。 - 請求項15に記載のプラズマ処理システムにおいて、
前記第1のバルブは、100℃〜200℃の温度の排ガスに対して作動可能である。 - 請求項15に記載のプラズマ処理システムにおいて、
前記第1のバルブのダイアフラムの表面には、PFA膜又はフルオロカーボン膜が形成されている。 - 請求項15に記載のプラズマ処理システムにおいて、
前記第1のバルブと前記排気管のそれぞれの内表面には、水分子を含まずピンホールボイドがなく、排ガスに対して耐食性を有する排ガス保護膜が形成されている。 - 請求項18に記載のプラズマ処理システムにおいて、
前記排ガス保護膜は、Al2O3膜又はY2O3膜である。 - 請求項15に記載のプラズマ処理システムにおいて、
前記第1のバルブと、前記排気装置から前記第1のバルブに排ガスを送る排気管と、前記第1のバルブから前記排ガス処理装置へ排ガスを送る排気管のそれぞれの内表面は、100℃〜200℃に加熱される。 - 請求項15に記載のプラズマ処理システムにおいて、
前記他の排気装置は、1段又は直列に接続された2段の真空ポンプを含む。 - 請求項15に記載のプラズマ処理システムにおいて、
前記他の排気装置の下流側に、
Kr及び/又はXeの回収装置と、
Kr及び/又はXeを含有する排ガスを選択的に前記回収装置へ供給する第3のバルブと、を設けている。 - 異なる組成の複数の膜を連続して成膜又はエッチングするプラズマ処理方法であって、
基板を収容した処理容器内に、流量を制御しながら、前記複数の膜のうちの第1の膜を成膜又はエッチングするために必要なガスを選択的に供給し、
前記処理容器内に高周波を2次元的に均一に供給することによって2次元的に均一にプラズマを発生させ、前記プラズマを用いて前記第1の膜を成膜又はエッチングする第1の工程と、
前記複数の膜のうちの第2の膜を成膜又はエッチングするために必要なガスを前記処理容器に選択的に供給し、前記プラズマを発生させ、前記プラズマを用いて前記第2の膜を成膜又はエッチングする第2の工程と、を連続して行う。 - 請求項23に記載のプラズマ処理方法において、
前記第1の工程又は第2の工程において、前記処理容器から排ガスを排気し、排ガスを処理する。 - 請求項23に記載のプラズマ処理方法において、
前記第1の工程の後に、他の工程を介在させずに直ちに前記第2の工程を行う。 - 請求項23に記載のプラズマ処理方法において、
前記第1の工程の後に、不活性ガスを前記処理容器内に供給して排気し、しかる後に前記第2の工程を行う。 - 電子装置の製造方法であって、
請求項23に記載のプラズマ処理方法によって、異なる組成の複数の膜を連続成膜又は連続エッチングする工程を含む。 - 請求項27に記載の電子装置の製造方法において、
前記電子装置は、半導体装置、平面ディスプレイ装置又は太陽電池である。
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