TIME-RESOLVED CHARGED PARTICLE MICROSCOPY
    18.
    发明申请

    公开(公告)号:US20180151326A1

    公开(公告)日:2018-05-31

    申请号:US15364163

    申请日:2016-11-29

    Applicant: FEI Company

    Inventor: Erik René Kieft

    Abstract: A method of investigating a specimen using charged particle microscopy, comprising the following steps: Using a primary source to produce a pulsed beam of charged particles that propagate along a beam path; Providing a specimen at an irradiation position in said beam path; Using a secondary source to produce repetitive excitations of the specimen; Using a detector to register charged particles in said beam that traverse the specimen after each said excitation, wherein: Said primary source is configured to produce a train of multiple pulses per excitation by said secondary source; Said detector is configured to comprise an integrated array of pixels, each with an individual readout circuit, to register a time-of-arrival of individual particles in said train.

    Innovative source assembly for ion beam production

    公开(公告)号:US09941094B1

    公开(公告)日:2018-04-10

    申请号:US15422454

    申请日:2017-02-01

    Applicant: FEI Company

    CPC classification number: H01J37/08 H01J37/147 H01J37/261

    Abstract: A source assembly for producing an ion beam and comprising a collision ionization ion source having: A pair of stacked plates, sandwiched about an intervening gap; An ionization space between said plates, connected to a gas supply duct; An input zone, provided in a first of said plates, to admit an input beam of charged particles to said ionization space; An output aperture, located opposite said input zone and provided in the second of said plates, to allow emission of a flux of ions produced in said ionization space by said input beam, which source assembly comprises: A carrier provided with a plurality of different collision ionization ion sources that mutually differ in respect of a gap height d between said plates; A selecting device, which allows a given one of said ion sources to be individually selected for production of said ion beam. The various sources in said plurality preferably have a scattering quotient QS=d/li with a value in a range 1-500, preferably in a range 1-200, where li is an ionic mean free path length in said ionization space.

Patent Agency Ranking