DETERMINING SUBSET OF COMPONENTS OF AN OPTICAL CHARACTERISTIC OF PATTERNING APPARATUS

    公开(公告)号:US20220082943A1

    公开(公告)日:2022-03-17

    申请号:US17419360

    申请日:2019-12-12

    IPC分类号: G03F7/20

    摘要: A method for determining a component of optical characteristic of a patterning process. The method includes obtaining (i) a plurality of desired features, (ii) a plurality of simulated features based on the plurality of desired features and an optical characteristic of a patterning apparatus, and (iii) a performance metric (e.g., EPE) related to a desired feature of the plurality of desired features and an associated simulated feature of the plurality of simulated features; determining a set of optical sensitivities of the patterning process by computing a change in value of the performance metric based on a change in value of the optical characteristic; and identifying, based on the set of optical sensitivities, a set of components (e.g., principal components) of the optical characteristic that include dominant contributors in changing the value of the performance metric.