SCANNING ELECTRON MICROSCOPE AND A METHOD FOR OVERLAY MONITORING

    公开(公告)号:US20210335569A1

    公开(公告)日:2021-10-28

    申请号:US17369746

    申请日:2021-07-07

    Abstract: A scanning electron microscope and a method for evaluating a sample, the method may include (a) illuminating the sample with a primary electron beam, (b) directing secondary electrons emitted from the sample and propagated above a first scintillator, towards an upper portion of the first scintillator, wherein the first scintillator and a second scintillator are positioned between the sample and a column electrode of the column; wherein the first scintillator is positioned above the second scintillator; (c) detecting the secondary electrons by the first scintillator; (d) directing backscattered electrons emitted from the sample towards a lower portion of the second scintillator; and (e) detecting the backscattered electrons by the second scintillator.

    ENERGY DISPERSIVE X-RAY SPECTROSCOPY SENSING UNIT

    公开(公告)号:US20240057957A1

    公开(公告)日:2024-02-22

    申请号:US18110328

    申请日:2023-02-15

    CPC classification number: A61B6/482 A61B6/40 A61B6/52

    Abstract: An energy-dispersive x-ray spectroscopy (EDX) sensing unit, the EDX sensing unit include a protective unit and an x-ray sensor that includes one or more sensing regions. The protective unit is configured to (i) introduce a change in one or more properties of electrons emitted from a sample, thereby preventing the electrons emitted from the sample from reaching the one or more sensing regions, the electrons are emitted from the sample due to an illuminating of the sample by a primary electron beam, and (ii) increase a safety of operation of the EDX sensing unit. The x-ray sensor is configured to (i) receive, by the one or more sensing regions, x-ray photons emitted from the sample due to the illuminating of the sample, and (ii) generate detection signals indicative of the x-ray photons.

    ENERGY DISPERSIVE X-RAY SPECTROSCOPY SENSING UNIT BACKGROUND

    公开(公告)号:US20240060912A1

    公开(公告)日:2024-02-22

    申请号:US17891473

    申请日:2022-08-19

    CPC classification number: G01N23/20091 G01N23/2252 G01N2223/079

    Abstract: An EDX sensing unit that includes an x-ray sensor including one or more sensing regions, and a protective unit that is configured to introduce a change in one or more properties of electrons emitted from the sample, thereby preventing the electrons emitted from the sample from reaching the one or more sensing regions; wherein the electrons are emitted from the sample due to an illuminating of the sample by a primary electron beam. The x-ray sensor is configured to (i) receive, by the one or more sensing regions, x-ray photons emitted from the sample due to the illuminating of the sample, and (ii) generate detection signals indicative of the x-ray photons.

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