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    • 3. 发明申请
    • RF ELECTRON SOURCE FOR IONIZING GAS CLUSTERS
    • 用于气化气体集束的射频电子源
    • WO2009085954A2
    • 2009-07-09
    • PCT/US2008087430
    • 2008-12-18
    • VARIAN SEMICONDUCTOR EQUIPMENTOLSON JOSEPH CSCHEUER JAY T
    • OLSON JOSEPH CSCHEUER JAY T
    • H01J37/30H01L21/26
    • H01J27/18H01J27/026H01J37/08H01J37/30H01J37/31H01J2237/061H01J2237/06366H01J2237/0812H01J2237/31701
    • The present invention discloses a system and method for generating gas cluster ion beams (GCIB) having very low metallic contaminants. Gas cluster ion beam systems are plagued by high metallic contamination, thereby affecting their utility in many applications. This contamination is caused by the use of thermionic sources, which impart contaminants and are also susceptible to short lifecycles due to their elevated operating temperatures. While earlier modifications have focused on isolating the filament from the source gas cluster as much as possible, the present invention represents a significant advancement by eliminating the thermionic source completely. In the preferred embodiment, an inductively coupled plasma and ionization region replaces the thermionic source and ionizer of the prior art. Through the use of RF or microwave frequency electromagnetic waves, plasma can be created in the absence of a filament, thereby eliminating a major contributor of metallic contaminants.
    • 本发明公开了一种具有非常低金属污染物的气体簇离子束(GCIB)的系统和方法。 气体簇离子束系统受到高金属污染的困扰,从而影响其在许多应用中的应用。 这种污染是由于使用热电离源引起的,这些热源能够施加污染物,并且由于其运行温度升高而对生命周期的影响也很小。 虽然较早的修改集中在尽可能多地将源极气体簇隔离,但本发明通过完全消除热离子源代表了显着的进步。 在优选实施例中,电感耦合等离子体和电离区取代现有技术的热离子源和离子发生器。 通过使用RF或微波频率电磁波,可以在没有灯丝的情况下产生等离子体,从而消除金属污染物的主要贡献者。