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    • 4. 发明授权
    • Lithographic apparatus and device manufacturing method utilizing a large area FPD chuck equipped with encoders an encoder scale calibration method
    • 使用装有编码器的大面积FPD卡盘的光刻设备和器件制造方法进行编码器刻度校准方法
    • US07408617B2
    • 2008-08-05
    • US11165575
    • 2005-06-24
    • Engelbertus Antonius Fransiscus Van Der PaschHarmen Klaas Van Der Schoot
    • Engelbertus Antonius Fransiscus Van Der PaschHarmen Klaas Van Der Schoot
    • G03B27/42
    • G03F7/70291G03F7/70625
    • A lithographic apparatus comprises an illumination system, an array of individually controllable elements, a substrate table, a projection system, a position encoder, an imaging device, and an image processing unit. The illumination system conditions a radiation beam. The array of individually controllable elements modulates the cross-section of the radiation beam. The substrate table supports a substrate. The projection system projects the modulated radiation beam onto a target portion of the substrate, thereby applying a pattern to the target portion of the substrate. The pattern comprises a first line and a second line. The first line is offset from the second line. The position encoder determines a position of the substrate table. The position encoder comprises a position sensor and a scale. The scale comprises a plurality of lines intended to be straight and parallel to one another. The imaging device obtains an image of the first line and the second line. The image processing unit measures the separation between the first line and the second line in a plurality of locations, and determines the non-uniformity of at least a part of the scale from the plurality of separations.
    • 光刻设备包括照明系统,独立可控元件的阵列,衬底台,投影系统,位置编码器,成像设备和图像处理单元。 照明系统调节辐射束。 独立可控元件的阵列调制辐射束的横截面。 衬底台支撑衬底。 投影系统将调制的辐射束投影到基板的目标部分上,从而将图案施加到基板的目标部分。 该图案包括第一行和第二行。 第一行偏离第二行。 位置编码器确定衬底台的位置。 位置编码器包括位置传感器和秤。 该刻度尺包括多条相互直线并平行的线。 成像装置获得第一行和第二行的图像。 图像处理单元测量多个位置中第一线和第二线之间的间隔,并且从多个分离中确定刻度的至少一部分的不均匀性。