Synchronized integrated metrology for overlay-shift reduction

    公开(公告)号:US09841687B2

    公开(公告)日:2017-12-12

    申请号:US14798563

    申请日:2015-07-14

    CPC classification number: G03F7/70633

    Abstract: The present disclosure relates to a method of semiconductor processing. The method includes, receiving a first wafer having a photoresist coating on a face of the first wafer. An exposure unit is used to perform a first number of radiation exposures on the photoresist coating, thereby forming an exposed photoresist coating. The exposed photoresist coating is developed, thereby forming a developed photoresist coating. An OVL measurement zone pattern is selected from a number of different, pre-determined OVL measurement zone patterns based on at least one of: the first number of radiation exposures performed on the first wafer or a previous number of radiation exposures performed on a previously processed wafer, which was processed before the first wafer. A number of OVL measurements are performed on the developed photoresist coating within the selected OVL measurement zone pattern.

    Synchronized Integrated Metrology for Overlay-Shift Reduction
    4.
    发明申请
    Synchronized Integrated Metrology for Overlay-Shift Reduction 有权
    同步综合测量用于覆盖减少

    公开(公告)号:US20170017166A1

    公开(公告)日:2017-01-19

    申请号:US14798563

    申请日:2015-07-14

    CPC classification number: G03F7/70633

    Abstract: The present disclosure relates to a method of semiconductor processing. The method includes, receiving a first wafer having a photoresist coating on a face of the first wafer. An exposure unit is used to perform a first number of radiation exposures on the photoresist coating, thereby forming an exposed photoresist coating. The exposed photoresist coating is developed, thereby forming a developed photoresist coating. An OVL measurement zone pattern is selected from a number of different, pre-determined OVL measurement zone patterns based on at least one of: the first number of radiation exposures performed on the first wafer or a previous number of radiation exposures performed on a previously processed wafer, which was processed before the first wafer. A number of OVL measurements are performed on the developed photoresist coating within the selected OVL measurement zone pattern.

    Abstract translation: 本公开涉及一种半导体处理方法。 该方法包括:在第一晶片的表面上接收具有光致抗蚀剂涂层的第一晶片。 曝光单元用于在光致抗蚀剂涂层上执行第一数量的辐射照射,由此形成曝光的光致抗蚀剂涂层。 曝光的光致抗蚀剂涂层被显影,从而形成显影的光刻胶涂层。 基于以下至少一个,从多个不同的预定OVL测量区域图案中选择OVL测量区域图案:在第一晶片上执行的第一数量的辐射曝光或对先前处理的OVL测量区域图案执行的先前数量的辐射曝光 晶片,其在第一晶片之前被处理。 在所选择的OVL测量区域图案中对所开发的光致抗蚀剂涂层进行多个OVL测量。

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