Method and apparatus for inspection and metrology

    公开(公告)号:US10126659B2

    公开(公告)日:2018-11-13

    申请号:US15286319

    申请日:2016-10-05

    Abstract: A method including obtaining a plurality of radiation distributions of measurement radiation redirected by the target, each of the plurality of radiation distributions obtained at a different gap distance between the target and an optical element of a measurement apparatus, the optical element being the nearest optical element to the target used to provide the measurement radiation to the target, and determining a parameter related to the target using data of the plurality of radiation distributions in conjunction with a mathematical model describing the measurement target.

    Reflector and method of manufacturing a reflector

    公开(公告)号:US11145428B2

    公开(公告)日:2021-10-12

    申请号:US16440099

    申请日:2019-06-13

    Inventor: Ferry Zijp

    Abstract: Some embodiment describe a reflector comprising a hollow body having an interior surface defining a passage. The interior surface has an optical surface part configured to reflect radiation and a supporter surface part. The optical surface part has a predetermined optical power and the supporter surface part does not. The reflector can be made by providing an axially symmetric mandrel, shaping a part of the circumferential surface of the mandrel to form an inverse optical surface part that is not rotationally symmetric about the axis of the mandrel, forming a reflector body around the mandrel and releasing the reflector body from the mandrel whereby the reflector body has an optical surface defined by the inverse optical surface part and a supporter surface part defined by the rest of the outer surface of the mandrel.

    METHOD AND APPARATUS FOR INSPECTION AND METROLOGY
    5.
    发明申请
    METHOD AND APPARATUS FOR INSPECTION AND METROLOGY 有权
    检验和计量方法与装置

    公开(公告)号:US20160266503A1

    公开(公告)日:2016-09-15

    申请号:US15065674

    申请日:2016-03-09

    Abstract: A method of position control of an optical component relative to a surface is disclosed. The method may include: obtaining a first signal by a first position measurement process; controlling relative movement between the optical component and the surface for a first range of motion using the first signal; obtaining a second signal by a second position measurement process different than the first position measurement process; and controlling relative movement between the optical component and the surface for a second range of motion using the second signal, the second range of motion being nearer the surface than the first range of motion.

    Abstract translation: 公开了一种光学部件相对于表面的位置控制的方法。 该方法可以包括:通过第一位置测量处理获得第一信号; 使用所述第一信号来控制所述光学部件和所述表面之间的第一运动范围的相对运动; 通过与第一位置测量处理不同的第二位置测量处理获得第二信号; 以及使用所述第二信号来控制所述光学部件和所述表面之间的相对运动的第二运动范围,所述第二运动范围比所述第一运动范围更靠近所述表面。

    Reflector and method of manufacturing a reflector

    公开(公告)号:US11694821B2

    公开(公告)日:2023-07-04

    申请号:US17409213

    申请日:2021-08-23

    Inventor: Ferry Zijp

    Abstract: A reflector comprising a hollow body having an interior surface defining a passage through the hollow body, the interior surface having at least one optical surface part configured to reflect radiation and a supporter surface part, wherein the optical surface part has a predetermined optical power and the supporter surface part does not have the predetermined optical power. The reflector is made by providing an axially symmetric mandrel;



    shaping a part of the circumferential surface of the mandrel to form at least one inverse optical surface part that is not rotationally symmetric about the axis of the mandrel;
    forming a reflector body around the mandrel; and
    releasing the reflector body from the mandrel whereby the reflector body has an optical surface defined by the inverse optical surface part and a supporter surface part defined by the rest of the outer surface of the mandrel.

    Metrology tools comprising aplanatic objective singlet

    公开(公告)号:US11237484B2

    公开(公告)日:2022-02-01

    申请号:US16875012

    申请日:2020-05-15

    Inventor: Ferry Zijp

    Abstract: A metrology tool, an aplanatic singlet lens, and a method of designing an aplanatic singlet lens are provided. The metrology tool is for determining a characteristic of a structure on a substrate. The metrology tool comprises an optical detection system for detecting radiation over a wavelength range. The optical detection system comprises an aplanatic singlet lens for focusing the radiation on to a detector. The aplanatic singlet lens has a n aplanatic wavelength which is within the wavelength range.

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