MICROWAVE ION SOURCE, AND SHIELD MEMBER USED FOR THE SAME

PROBLEM TO BE SOLVED: To reduce deposits produced in the plasma chamber of a microwave ion source.SOLUTION: A microwave ion source 10 includes a plasma chamber 11 having a microwave introduction window 16 for introducing a microwave into the internal space 12 of the plasma chamber 11 axially, a side...

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Bibliographic Details
Main Author MURATA HIROHIKO
Format Patent
LanguageEnglish
Japanese
Published 16.11.2015
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Summary:PROBLEM TO BE SOLVED: To reduce deposits produced in the plasma chamber of a microwave ion source.SOLUTION: A microwave ion source 10 includes a plasma chamber 11 having a microwave introduction window 16 for introducing a microwave into the internal space 12 of the plasma chamber 11 axially, a side wall 15 axially extending so as to surround the internal space 12, and an ion extraction opening 17 provided at a position axially facing the microwave introduction window 16, a liner 20 provided along the side wall 15 in the internal space 12, and a shield member 60 provided on the inside of the liner 20 in the inner space 12 for partitioning the inner space 12 to a plasma generating space 12a and a microwave shielding space 12b positioned at the outside of the plasma generating space 12a. The shield member 60 has a plurality of small holes 63 for communicating the plasma generating space 12a with the microwave shielding space 12b. 【課題】マイクロ波イオン源のプラズマ室内で発生する堆積物を低減する。【解決手段】マイクロ波イオン源10は、プラズマ室11の内部空間12にマイクロ波を軸方向に導入するためのマイクロ波導入窓16と、内部空間12を囲むように軸方向に延在する側壁15と、マイクロ波導入窓16と軸方向に対向する位置に設けられるイオン引出開口17と、を含むプラズマ室11と、内部空間12において側壁15に沿って設けられるライナ20と、内部空間12においてライナ20よりも内側に設けられ、内部空間12をプラズマ生成空間12aとプラズマ生成空間12aの外側に位置するマイクロ波遮蔽空間12bとに区画するシールド部材60と、を備える。シールド部材60は、プラズマ生成空間12aとマイクロ波遮蔽空間12bとを連通させる複数の小孔63を有する。【選択図】図1
Bibliography:Application Number: JP20140082537