Multi charged particle beam writing apparatus and method of adjusting same

    公开(公告)号:US11740546B2

    公开(公告)日:2023-08-29

    申请号:US17653665

    申请日:2022-03-07

    摘要: In one embodiment, a multi charged particle beam writing apparatus includes an objective lens adjusting focus positions of multiple beams, an astigmatism correction element correcting astigmatism of the multiple beams, an inspection aperture allowing one of the multiple beams to pass therethrough, a deflector deflecting the multiple beams and causing the multiple beams to scan over the inspection aperture, a current detector detecting beam currents of the individual multiple beams after passing through the inspection aperture, a beam image formation unit forming a beam image based on the detected beam currents, a feature amount calculation unit generating a first waveform and a second waveform by adding brightnesses of the beam image in a first direction and in a second direction, and calculating a first and a second feature amounts from the first and the second waveforms, and a parameter calculation unit calculating an exciting parameter that is to be set for the astigmatism correction element based on the first feature amount and the second feature amount.

    MULTI CHARGED PARTICLE BEAM WRITING APPARATUS AND METHOD OF ADJUSTING SAME

    公开(公告)号:US20220299861A1

    公开(公告)日:2022-09-22

    申请号:US17653665

    申请日:2022-03-07

    摘要: In one embodiment, a multi charged particle beam writing apparatus includes an objective lens adjusting focus positions of multiple beams, an astigmatism correction element correcting astigmatism of the multiple beams, an inspection aperture allowing one of the multiple beams to pass therethrough, a deflector deflecting the multiple beams and causing the multiple beams to scan over the inspection aperture, a current detector detecting beam currents of the individual multiple beams after passing through the inspection aperture, a beam image formation unit forming a beam image based on the detected beam currents, a feature amount calculation unit generating a first waveform and a second waveform by adding brightnesses of the beam image in a first direction and in a second direction, and calculating a first and a second feature amounts from the first and the second waveforms, and a parameter calculation unit calculating an exciting parameter that is to be set for the astigmatism correction element based on the first feature amount and the second feature amount.

    Design-rule checking for curvilinear device features

    公开(公告)号:US10997355B1

    公开(公告)日:2021-05-04

    申请号:US16669808

    申请日:2019-10-31

    摘要: One illustrative system includes a processor and memory storing instructions that, when executed by the processor, cause the system to receive a device layout including a curvilinear feature, define a plurality of vertices for the curvilinear feature, determine a radius of curvature between a selected vertex in the plurality of vertices and a neighboring vertex in the plurality of vertices, and identify a design rule violation for the curvilinear feature responsive to the radius of curvature being less than a predetermined threshold.

    Mask bias approximation
    148.
    发明授权

    公开(公告)号:US10705420B2

    公开(公告)日:2020-07-07

    申请号:US15979751

    申请日:2018-05-15

    申请人: ASML US, LLC

    摘要: Directly biasing a mask image is disclosed. A method includes generating a mask image for the mask, biasing the mask image to obtain a biased mask image, and simulating the biased mask image to obtain a wafer image to be compared to the design pattern. Biasing the mask image includes updating at least one pixel of the mask image using an interpolation of neighboring pixels of the at least one pixel, the interpolation being dependent on a predetermined value.

    PHOTORESIST AND PREPARATION METHOD THEREOF
    150.
    发明申请

    公开(公告)号:US20190204727A1

    公开(公告)日:2019-07-04

    申请号:US15993936

    申请日:2018-05-31

    发明人: Lixuan CHEN

    IPC分类号: G03F1/20 G03F1/22

    CPC分类号: G03F1/20 G03F1/22

    摘要: The present disclosure provides a photoresist and a preparation method thereof. The photoresist includes at least one kind of resin, a photoinitiator, a solvent, and at least one kind of scattering particle, and the at least one kind of scattering particle being configured to scatter ultraviolet light irradiated into the photoresist. The present disclosure may increase an exposure energy that the photoresist obtains during an exposure process, and thereby may reduce an exposure time required for the photoresist.