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    • 8. 发明公开
    • POSITION SENSING METHOD AND POSITION SENSOR, EXPOSING METHOD AND EXPOSING APPARATUS, AND DEVICE AND DEVICE MANUFACTURING METHOD
    • POSITIONSDETEKTIERUNGSVERFAHREN,位置传感器,照明装置和方法,器件及其制造方法
    • EP1164352A1
    • 2001-12-19
    • EP00903969.4
    • 2000-02-16
    • Nikon Corporation
    • YOSHIDA, Kouji, Nikon Corporation
    • G01B21/00G01B11/00H01L21/027G03F9/00
    • G03F9/7046G03F9/7003G03F9/7092
    • A parameter calculation unit (33) statistically calculates the estimations and their certainty of a predetermined number of parameters, which uniquely specify any position on an object, for each of a plurality of measured sample sets on the basis of position information of marks composing the sample set. A valid value calculation unit (34) calculates statistically valid values of the predetermined number of parameters on the basis of groups of the estimations and their certainty of the predetermined number of parameters for the respective sample sets. Furthermore, an evaluation unit (35) statistically evaluates if the number of marks composing a sample set can be reduced. If it is determined that the number of marks can be reduced, the parameter calculation unit (33) calculates values of the predetermined number of parameters by using a new sample set having reduced number of marks. Using the values of the predetermined number of parameters calculated in this manner, the position of any area on the object can be accurately detected.
    • 参数计算单元(33)统计学计算的估计及其参数的预定数量的确定性,其唯一地指定任何位置上的对象,对于每个测量的样品设定多个的标记的位置信息构成样品的基础上 设置。 有效的值计算单元(34)计算的估计及其为respectivement样本集合参数的预定数量的确定性的组的基础上的参数的预定数量的统计上有效的值。 进一步,以评估单元(35)统计学评估是否可以减少构成一个样品组标记的数目。 如果它被确定开采并能够减少标记的数量,参数计算单元(33)通过使用具有降低的标记的数目的新的采样集计算的参数的预定数量的值。 使用以这种方式计算出的参数的预定数量的值,能够准确地设定检测到的任何区域的对象上的位置。
    • 9. 发明公开
    • Position detection
    • Positionsdetektion
    • EP1122612A2
    • 2001-08-08
    • EP01300784.4
    • 2001-01-30
    • Nikon Corporation
    • Yoshida, Kouji, c/o Nikon Corporation
    • G03F9/00
    • G03F9/7088G03F9/7092
    • After the plural marks are picked-up by the image pick-up system AS under the image pick-up condition including the plural defocus states, the relationship between the picked-up image of the mark and the defocus amount is obtained. The relationship is the manner in the change of the picked-up image of the mark depending on the varied defocus amount. From the relationship between the obtained picked-up image of the mark and the defocus amount, the positional information of the mark is estimated. That is, the positional information of the mark is that should be obtained by using the image of the mark at the focus state. As a result, even when the contrast between the line pattern portion and the space pattern portion in the picked-up image of the mark at the focus state is low, the positional information of the mark is precisely detected.
    • 在包括多个散焦状态的图像拾取条件下,由图像拾取系统AS拾取多个标记之后,获得标记的拾取图像与散焦量之间的关系。 关系是根据变化的散焦量改变标记的拾取图像的方式。 根据获得的标记的拍摄图像与散焦量之间的关系,估计标记的位置信息。 也就是说,标记的位置信息应该通过在聚焦状态下使用标记的图像来获得。 结果,即使当在聚焦状态下标记的拾取图像中的线图案部分和空间图案部分之间的对比度低时,也能够精确地检测标记的位置信息。
    • 10. 发明公开
    • Method of aligning mask and workpiece in exposure device
    • Verfahren zur Ausrichtung einer Maske und einesWerkstücks在einer Belichtungsvorrichtung
    • EP1091255A2
    • 2001-04-11
    • EP00121522.7
    • 2000-09-30
    • USHIODENKI KABUSHIKI KAISHA
    • Tanaka, Yoneta
    • G03F9/00
    • G03F9/7088G03F9/7076G03F9/7092H05K3/0008H05K3/0082
    • A mask and workpiece are aligned with good accuracy even if the shape of workpiece marks, etc., should deform due to process defects by a plurality of workpiece marks (WAM) being affixed in proximity on a workpiece W so as to lie within a field of an alignment microscope, and a plurality of workpiece mark images that are imaged by the alignment microscope are fed to processing unit. The processing unit detects the spatial coordinates of the plurality of workpiece marks and averages their spatial coordinates. Then, a workpiece stage or mask stage is moved so that mask mark has a prescribed spatial relationship with respect to the spatial coordinates determined through the aforementioned averaging, and the mask is aligned with workpiece. Then, the reliability of the spatial coordinates of each of a plurality of workpiece marks is verified and only those workpiece marks which permit the required alignment accuracy to be ensured are be selected.
    • 即使工件标记等的形状由于多个工件标记(WAM)附近被固定在工件W上的工艺缺陷而变形,掩模和工件也被准确地对准,以便位于工件 并且通过对准显微镜成像的多个工件标记图像被馈送到处理单元。 处理单元检测多个工件标记的空间坐标,并平均其空间坐标。 然后,移动工件台或掩模台,使得掩模标记相对于通过上述平均确定的空间坐标具有规定的空间关系,并且掩模与工件对准。 然后,验证多个工件标记中的每一个的空间坐标的可靠性,并且仅选择能够确保所需对准精度的那些工件标记。