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    • 11. 发明授权
    • Charged particle beam apparatus
    • 带电粒子束装置
    • US08686380B2
    • 2014-04-01
    • US12453986
    • 2009-05-28
    • Souichi KatagiriTakashi OhshimaSho TakamiMakoto EzumiTakashi DoiYuji Kasai
    • Souichi KatagiriTakashi OhshimaSho TakamiMakoto EzumiTakashi DoiYuji Kasai
    • G21G5/00
    • H01J37/18H01J2237/06341H01J2237/182H01J2237/188
    • The present invention provides a charged particle beam apparatus that keeps the degree of vacuum in the vicinity of the electron source to ultra-high vacuum such as 10−8 to 10−9 Pa even in the state where electron beams are emitted using a non-evaporable getter pump and is not affected by dropout foreign particles.The present invention includes a vacuum vessel in which a charged particle source (electron source, ion source, etc.) is disposed and a non-evaporable getter pump disposed at a position that does not directly face electron beams and includes a structure that makes the non-evaporable getter pump upward with respect to a horizontal direction to drop out foreign particles into a bottom in a groove, so that the foreign particles dropped out from the non-evaporable getter pump do not face an electron optical system. Or, the present invention includes a structure that is covered by a shield means, or a means that is disposed immediately on a surface of the non-evaporable getter pump but at a position where the electron beams are not seen and has a concave structure capable of trapping the dropout foreign particles on a lower portion of the non-evaporable getter pump.
    • 本发明提供了一种带电粒子束装置,其将电子源附近的真空度保持为10-8至10-9Pa的超高真空度,即使在使用非电子束发射电子束的状态下, 可蒸发吸气泵,不受脱落异物的影响。 本发明包括设置有带电粒子源(电子源,离子源等)的真空容器和设置在不直接面向电子束的位置的非蒸发性吸气泵,并且包括使 不可蒸发的吸气剂相对于水平方向向上泵送以将异物排出到槽中的底部,使得从非蒸发性吸气泵排出的异物不面向电子光学系统。 或者,本发明包括被屏蔽装置覆盖的结构,或者立即设置在不可蒸发的吸气泵的表面上,但是在不能看到电子束的位置处并具有凹形结构的装置 在非蒸发性吸气泵的下部捕获脱落的异物。
    • 14. 发明申请
    • SPECTRUM SPREAD COMMUNICATION SYSTEM
    • 光谱传播通信系统
    • US20130089120A1
    • 2013-04-11
    • US13704087
    • 2011-06-06
    • Yuji KasaiMasahiro MurakawaTetsuya Higuchi
    • Yuji KasaiMasahiro MurakawaTetsuya Higuchi
    • H04B1/7075
    • H04B1/7075H04B1/707H04B1/7073H04B1/70735H04B3/542H04B2203/5416H04J13/16
    • Disclosed is a spectrum spread communication system which is hardly influenced by noises, and in which a frame structure can be identified at a receiving side without use of a frame synchronization signal. A spread code generator switches spread codes (“Scai” and “Scbi”) in each frame, and outputs it to a spread modulation unit. The spread modulation unit performs spread modulation of transmission data, and transmits it to a direct current power line. A reference code generator generates reference codes (“Scai” and “Scbi”) in the same code phase. Spread demodulation units performs spread demodulation of the received signal with use of the reference codes (“Scai” and “Scbi”), and output it to a selection unit. A frame synchronization detection unit identifies a frame structure on the basis of switching of a synchronization state of a code phase in a code phase synchronization detection unit. The selection unit outputs reception data by selecting spread demodulated data from the spread demodulation unit which is in a phase-synchronized state.
    • 公开了几乎不受噪声影响的频谱扩展通信系统,其中可以在接收侧识别帧结构而不使用帧同步信号。 扩频码发生器在每帧中切换扩频码(Scai和Scbi),并将其输出到扩展调制单元。 扩展调制单元执行发送数据的扩展调制,并将其发送到直流电力线。 参考代码生成器在相同的代码阶段生成参考代码(Scai和Scbi)。 扩展解调单元使用参考码(Scai和Scbi)对接收信号进行扩展解调,并将其输出到选择单元。 帧同步检测单元基于码相位同步检测单元中的码相位的同步状态的切换来识别帧结构。 选择单元通过从相位同步状态的扩展解调单元中选择扩展解调数据来输出接收数据。