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    • 2. 发明授权
    • Charged particle beam apparatus
    • 带电粒子束装置
    • US07615765B2
    • 2009-11-10
    • US11589821
    • 2006-10-31
    • Souichi KatagiriTakashi OhshimaToshihide AgemuraMitsugu Sato
    • Souichi KatagiriTakashi OhshimaToshihide AgemuraMitsugu Sato
    • A61N5/00G21G5/00
    • H01J37/18H01J37/28H01J2237/022H01J2237/1825H01J2237/188H01J2237/31749
    • There is provided a compact charged particle beam apparatus with a non-evaporable getter pump which maintains high vacuum even during emission of an electron beam without generating foreign particles. The apparatus comprises: a charged particle source; a charged particle optics which focuses a charged particle beam emitted from the charged particle source on a sample and performs scanning; and means of vacuum pumping which evacuates the charged particle optics. The means of vacuum pumping has a differential pumping structure with two or more vacuum chambers connected through an opening in series. A pump made of non-evaporable getter alloy is placed in an upstream vacuum chamber with a high degree of vacuum, and a gas absorbing surface of the non-evaporable getter alloy is fixed without contact with another part.
    • 提供了一种具有非蒸发性吸气泵的紧凑型带电粒子束装置,即使在电子束的发射期间也能保持高真空而不产生异物。 该装置包括:带电粒子源; 带电粒子光学器件,其将从带电粒子源发射的带电粒子束聚焦在样品上并执行扫描; 以及抽空带电粒子光学元件的真空泵送装置。 真空泵送装置具有差分泵送结构,其中两个或多个真空室通过串联的开口连接。 将由不可蒸发的吸气剂合金制成的泵放置在具有高真空度的上游真空室中,并且非蒸发性吸气剂合金的气体吸收表面固定而不与另一部分接触。