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    • 10. 发明公开
    • INSULATING STRUCTURE, ELECTROSTATIC LENS, AND CHARGED PARTICLE BEAM DEVICE
    • EP4415020A2
    • 2024-08-14
    • EP24156942.5
    • 2024-02-09
    • EBARA CORPORATION
    • TOMA, YasushiKARIMATA, TsutomuAOTA, SadashiFUJISAWA, Shinsetsu
    • H01J37/12
    • H01J37/12H01J2237/020620130101H01J2237/03820130101
    • Provided is, inter alia, an insulating structure (300) used in a vacuum for a charged particle beam device, the insulating structure comprising:
      - an anode (310); a cathode (320) facing the anode; and an insulator (330) disposed between the anode and the cathode, wherein
      - the anode (310) has an anode flat surface (311) in contact with the insulator (330),
      - the cathode (320) has:
      - a first cathode flat surface (322) that is substantially parallel to the anode flat surface (311) and has a first distance from the anode flat surface (311);
      - a second cathode flat surface (321) that is substantially parallel to the anode flat surface (311), and has a second distance from the anode flat surface (311), the second distance being smaller than the first distance; and
      - a cathode connection surface (323) that connects the first cathode flat surface (322) and the second cathode flat surface (321), and
      - the insulator (330) has:
      - a first insulator flat surface (331) in contact with the anode flat surface (311);
      - a second insulator flat surface (332) in contact with the first cathode flat surface (322) between the anode flat surface (311) and the first cathode flat surface (322);
      - a third insulator flat surface (333) between the anode flat surface (311) and the second cathode flat surface (321), having a third distance from the anode flat surface (311), the third distance being smaller than the second distance, and not in contact with the second cathode flat surface (321);
      - a first insulator connection surface (334) that connects the second insulator flat surface (332) and the third insulator flat surface (333) but is not in contact with the cathode (320); and a second insulator connection surface (335) located inside an outer peripheral end of the anode (310) and an outer peripheral end of the cathode (320) and connecting the first insulator flat surface (331) and the third insulator flat surface (333).