ALIGNMENT SYSTEM, LITHOGRAPHIC SYSTEM AND METHOD
    1.
    发明申请
    ALIGNMENT SYSTEM, LITHOGRAPHIC SYSTEM AND METHOD 审中-公开
    对准系统,光刻系统和方法

    公开(公告)号:WO2010006935A2

    公开(公告)日:2010-01-21

    申请号:PCT/EP2009058404

    申请日:2009-07-03

    CPC classification number: G03F9/7003 G03F7/705 G03F7/70633

    Abstract: A lithographic system includes a lithographic apparatus comprising a projection system which projects a patterned radiation beam onto a target portion of a substrate and an alignment system which measures the position of a feature of the pattern on the substrate at a number of locations over the substrate. A controller compares the measured positions with points on a grid of values and extrapolates values for intermediate positions on the substrate based on values of corresponding intermediate points on the grid, so as to provide an indication of the intermediate positions on the substrate and their displacements relative to the grid. The grid is based on at least one orthogonal basis function, the measurement on the substrate being performed at positions corresponding to the root values of the at least one orthogonal basis function.

    Abstract translation: 一种光刻系统包括光刻设备,该光刻设备包括将图案化的辐射束投影到衬底的目标部分上的投影系统和在衬底上的多个位置处测量图案的特征在衬底上的位置的对准系统。 控制器将测量的位置与值的网格上的点进行比较,并基于网格上的对应中间点的值推断衬底上的中间位置的值,以便提供衬底​​上的中间位置的指示以及它们相对的位移 到电网。 网格基于至少一个正交基函数,基板上的测量在对应于至少一个正交基函数的根值的位置处执行。

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