JP2013115047A - 分光分析用の電子ビーム源としての誘導結合プラズマ源 - Google Patents
分光分析用の電子ビーム源としての誘導結合プラズマ源 Download PDFInfo
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Abstract
【解決手段】X線検出器が装着されていれば、エネルギー分散型のX線分光分析が可能である。ユーザは、イオン・モードまたはFIBモードで試料を調製するようにICPを選択的に構成し、次いで電子モードまたはSEMモードを選択するスイッチを実際に動かし、EDSまたは他のタイプの分析を使用して試料を分析することができる。
【選択図】図2
Description
204 アンテナ
206 源バイアス電極
208 引出し電極
210 コンデンサ電極
212 レンズ
222 RF電源
240 試料
Claims (23)
- プラズマを維持するプラズマ室と、
前記プラズマを動作電圧にバイアスするバイアス電極と、
前記バイアス電極に正または負の電圧を印加することができる電源であり、前記プラズマ室から正または負に帯電した粒子を選択的に引き出すために極性を切り換えることができる電源と、
前記プラズマ源から荷電粒子を引き出す引出し電極と、
前記引出し電極に正または負の電圧を印加することができる引出し電極電源と、
前記プラズマ源から引き出された前記荷電粒子を加工物上に集束させる集束カラムであり、前記正または負に帯電した粒子を前記加工物上に集束させる集束カラムと
を備える荷電粒子ビーム・システム。 - 前記プラズマ室から引き出され、前記集束カラムによって前記加工物上に集束した電子の衝突によって発生したX線を検出するX線検出器をさらに備える、請求項1に記載の荷電粒子ビーム・システム。
- 前記プラズマ室が、誘導結合プラズマ源の部分である、請求項1または請求項2に記載の荷電粒子ビーム・システム。
- 試料を処理し、試料の特性を決定する装置であって、
第1のモードではイオン源として、第2のモードでは電子源として選択的に動作する誘導結合プラズマ源と、
前記第1のモードに対応し集束イオン・ビーム動作を可能にする第1の電圧構成と、少なくとも1つの第2のモードに対応しSEM動作を可能にする少なくとも1つの第2の電圧構成とを選択的に提供するように構成された電源と、
試料の特性を決定するのに必要な情報を集めるX線検出器と
を備える装置。 - 前記検出器がエネルギー分散型X線検出器である、請求項4に記載の装置。
- 前記エネルギー分散型X線検出器がシリコン・ドリフト検出器型の検出器である、請求項5に記載の装置。
- 試料の前記特性が、前記試料の化学組成または元素組成を含む、請求項4〜6に記載の装置。
- 前記第1の電圧構成が、源電極に印加されるグランドに対して正の高電圧と、引出し電極に印加される源電極電圧に対して負の高電圧とからなり、前記第2の電圧構成が、前記源電極に印加されるグランドに対して負の高電圧と、前記引出し電極に印加される前記源電極電圧に対して正の高電圧とからなる、請求項4〜7に記載の装置。
- 試料を処理する方法であって、
第1のモードではイオン・ビームが生み出され、少なくとも1つの第2のモードでは電子ビームが生み出されるような形でユーザが選択可能な動作モードを有する単一カラム誘導結合プラズマ源を用意するステップと、
前記誘導結合プラズマ源の動作モードを選択するステップと、
生み出された前記ビームを試料に向かって導くステップと、
生み出された前記ビームで前記試料を処理するステップと
を含む方法。 - 生み出された前記ビームを試料に向かって導くステップが、200nm未満のスポット・サイズを有するビームを前記試料に向かって導くステップを含む、請求項9に記載の方法。
- 生み出された前記ビームを試料に向かって導くステップが、前記第1のモードでは前記イオン・ビームを前記試料に向かって導き、前記第2のモードでは前記電子ビームを前記試料に向かって導くステップを含む、請求項9または請求項10に記載の方法。
- 生み出された前記ビームで前記試料を処理するステップが、前記イオン・ビームで前記試料を処理して集束イオン・ビーム動作を実行するステップと、前記電子ビームで前記試料を走査し、その間に放出されたX線を集めて前記試料の特性を決定するステップとを含む、請求項9〜11に記載の方法。
- 前記イオン・ビームで前記試料を処理して集束イオン・ビーム動作を実行するステップが、前記電子ビームによって分析対象の材料を露出させるステップを含む、請求項12に記載の方法。
- 前記電子ビームによって分析対象の材料を露出させるステップが、前記試料表面から材料の層を除去するステップを含む、請求項13に記載の方法。
- 試料を処理する方法であって、
アンテナからの高周波エネルギーを分割ファラデー・シールドを通してプラズマ室内へ誘導結合して、前記プラズマ室内にプラズマを発生させるステップと、
前記プラズマ室内の前記プラズマから電子を引き出すステップと、
前記電子を成形して集束ビームとし、前記ビームを前記試料に向かって導くステップと
を含む方法。 - 前記集束電子ビームの前記試料の位置におけるスポット・サイズが200nm未満、電子電流が1nA以上である、請求項15に記載の方法。
- 前記集束電子ビームの前記試料の位置におけるスポット・サイズが2.3μm未満、電子電流が1μA以上である、請求項15に記載の方法。
- 走査中に電子が衝突した点からの放出物を検出するステップと、
集められた前記放出物から前記試料の特性を決定するステップと
をさらに含む、請求項15〜17に記載の方法。 - 前記放出物がX線である、請求項18に記載の方法。
- 前記放出物が、2次電子または後方散乱電子である、請求項18に記載の方法。
- 前記プラズマ室からイオンを引き出すステップと、
前記イオンを成形して集束ビームとし、前記ビームを前記試料に向かって導くステップと
をさらに含む、請求項15〜17に記載の方法。 - 前記イオンを成形して集束ビームとし、前記ビームを前記試料に向かって導くステップが、試料表面から材料を除去してその下の材料を露出させるステップを含み、
前記電子を成形して集束ビームとし、前記ビームを前記試料に向かって導くステップが、前記試料を真空室から取り出すことなしに、露出させた前記その下の材料に向かって前記ビームを導くステップを含む、
請求項21に記載の方法。 - 前記プラズマ室からイオンを引き出す前記ステップが、アルゴン・イオン、キセノン・イオンまたは酸素イオンを引き出すステップを含む、請求項21または請求項22に記載の方法。
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