Lithographic method
    1.
    发明申请
    Lithographic method 审中-公开
    平版印刷法

    公开(公告)号:US20090207399A1

    公开(公告)日:2009-08-20

    申请号:US12318035

    申请日:2008-12-19

    IPC分类号: G03B27/58 G01B11/00

    摘要: A method of calibrating a front to backside alignment capable lithographic apparatus. The method includes attaching a substrate having a plurality of alignment marks to a carrier, the substrate being arranged such that the alignment marks face towards the carrier; reducing the thickness of the substrate; using an alignment system of the apparatus to measure the positions of images of alignment marks formed by optics in a substrate table of the apparatus; projecting a pattern onto the substrate, the position of the pattern being determined according to the measured positions of the alignment marks; measuring the positions of the projected pattern and the alignment marks provided on the opposite side of the substrate, the position of the alignment marks provided on the opposite side of the substrate being measured by the alignment system directing radiation through the substrate; and comparing the measured positions in order to determine an overlay error.

    摘要翻译: 校准从前到后对准的光刻设备的方法。 所述方法包括将具有多个对准标记的基板附接到载体上,所述基板布置成使得所述对准标记朝向所述载体; 减小基板的厚度; 使用所述装置的对准系统来测量由所述装置的衬底台中的光学元件形成的对准标记的图像的位置; 将图案投影到基板上,根据对准标记的测量位置确定图案的位置; 测量投影图案的位置和设置在基板的相对侧上的对准标记,设置在基板的相对侧上的对准标记的位置由通过基板引导辐射的对准系统测量; 并比较测量位置以确定重叠误差。