Computational metrology based sampling scheme

    公开(公告)号:US12044979B2

    公开(公告)日:2024-07-23

    申请号:US18122655

    申请日:2023-03-16

    CPC classification number: G03F7/705 G03F7/70633 G06F17/18 G06F18/24

    Abstract: A method for generating metrology sampling scheme for a patterning process, the method including: obtaining a parameter map of a parameter of a patterning process for a substrate; decomposing the parameter map to generate a fingerprint specific to an apparatus of the patterning process and/or a combination of apparatuses of the patterning process; and based on the fingerprint, generating a metrology sampling scheme for a subsequent substrate at the apparatus of the patterning process and/or the combination of apparatuses of the patterning process, wherein the sampling scheme is configured to distribute sampling points on the subsequent substrate so as to improve a metrology sampling density.

    Method for calibrating a scanning charged particle microscope

    公开(公告)号:US11972922B2

    公开(公告)日:2024-04-30

    申请号:US18126322

    申请日:2023-03-24

    CPC classification number: H01J37/28 H01J37/222 H01J2237/2826

    Abstract: A method for calibrating a scanning charged particle microscope, such as a scanning electron microscope (SEM), is provided. The method includes dividing a wafer into a plurality of regions; preparing, on each of the plurality of regions, a pattern including a first periodic structure interleaved with a second periodic structure, the first and second periodic structures having an induced offset; determining an actual pitch the first and second periodic structures and thereby determining actual induced offset on each of the plurality of regions; selecting a plurality of regions from among the plurality of regions; measuring, by the SEM, a pitch of first and second periodic structures on each of the plurality of regions; and performing linearity calibration on the SEM based on the determining and the measuring.

    Methods using fingerprint and evolution analysis

    公开(公告)号:US11281110B2

    公开(公告)日:2022-03-22

    申请号:US16973395

    申请日:2019-05-20

    Abstract: A method of determining a sampling control scheme and/or a processing control scheme for substrates processed by a device. The method uses a fingerprint model and an evolution model to generate the control scheme. The fingerprint model is based on fingerprint data for a processing parameter of at least one substrate processed by a device, and the evolution model represents variation of the fingerprint data over time. The fingerprint model and the evolution model are analyzed and a sampling and/or processing control scheme is generated using the analysis. The sampling control scheme provides an indication for where and when to take measurements on substrates processed by the device. The processing control scheme provides an indication for how to control the processing of the substrate. Also, there is provided a method of determining which of multiple devices contributed to a fingerprint of a processing parameter.

    Method and system to monitor a process apparatus

    公开(公告)号:US10571806B2

    公开(公告)日:2020-02-25

    申请号:US16327363

    申请日:2017-08-03

    Abstract: A method involving determining a contribution that one or more process apparatuses make to a characteristic of a substrate after the substrate has been processed according to a patterning process by the one or more process apparatuses by removing from values of the characteristic of the substrate a contribution of a lithography apparatus to the characteristic and a contribution of one or more pre-lithography process apparatuses to the characteristic.

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