ELECTROSTATIC CLAMP FOR A LITHOGRAPHIC APPARATUS

    公开(公告)号:US20220146948A1

    公开(公告)日:2022-05-12

    申请号:US17438021

    申请日:2020-03-06

    Abstract: An electrostatic clamp for supporting a substrate includes a substrate region, an electrode region at an edge of the substrate region, a support layer, an electrically conductive layer, a contact layer, and an electrode. The support layer has a body having first and second surfaces that are substantially parallel to each other and disposed on opposite sides of the body. A through-hole is disposed in the electrode region and provides access between the first and second surfaces. The electrically conductive layer is disposed on the second surface of the support layer. The contact layer disposed on the electrically conductive layer. The contact layer is uninterrupted in the electrode region and comprises burls in the substrate region. The burls contact the substrate when the electrostatic clamp is supporting the substrate. The electrode is disposed in the through-hole and is electrically coupled to the electrically conductive layer.

    COOLING HOOD FOR RETICLE
    4.
    发明公开

    公开(公告)号:US20240288783A1

    公开(公告)日:2024-08-29

    申请号:US18570242

    申请日:2022-05-27

    CPC classification number: G03F7/70875 G03F7/70358

    Abstract: Systems, apparatuses, and methods are provided for removing heat from a reticle. An example method can include generating, by a cooling controller, a cooling control signal based on timing data for a projection of a patterned radiation beam formed by illuminating an exposed area on a reticle supported by a reticle table, absorption data for the exposed area, and a target heat transfer rate. The cooling control signal can instruct a reticle cooling apparatus to actuate actuators to modify a distance between the reticle and a roof of the reticle cooling apparatus. The method can further include modifying, by the actuators based on the cooling control signal, the distance between the reticle and the roof to modify a heat transfer rate associated with a removal of heat from the reticle towards the target heat transfer rate.

    Apparatus for and Method Cleaning a Support Inside a Lithography Apparatus

    公开(公告)号:US20200348606A1

    公开(公告)日:2020-11-05

    申请号:US16642927

    申请日:2018-07-31

    Abstract: Methods and systems are described for cleaning a support such as a clamp of a chuck that holds a patterning device or a wafer in a lithographic apparatus. The method includes loading a electrostatic cleaning substrate into a lithographic apparatus. The electrostatic cleaning substrate includes at least one electrode. The method further includes bringing the electrostatic cleaning substrate near to the clamping surface to be cleaned and connecting the electrode to a voltage source. Particles present on the support are then transferred to the electrostatic cleaning substrate.

    OPTICAL COMPONENT AND CLAMP USED IN LITHOGRAPHIC APPARATUS

    公开(公告)号:US20220404720A1

    公开(公告)日:2022-12-22

    申请号:US17772201

    申请日:2020-10-21

    Abstract: An optical element and a lithographic apparatus including the optical element. The optical element includes a first member having a curved optical surface and a heat transfer surface, and a second member that comprises at least one recess, the at least one recess sealed against the heat transfer surface to form at least one closed channel between the first member and the second member to allow fluid to flow therethrough for thermal conditioning of the curved optical surface. In an embodiment, one or more regions of the heat transfer surface exposed to the at least one closed channel are positioned along a curved profile similar to that of the curved optical surface.

    RETICLE SUB-FIELD THERMAL CONTROL

    公开(公告)号:US20220057723A1

    公开(公告)日:2022-02-24

    申请号:US17415715

    申请日:2019-12-12

    Abstract: An apparatus for reticle sub-field thermal control in a lithography system is disclosed. The apparatus includes a clamp configured to fix an object. The clamp includes a plurality of gas distribution features that are spatially arranged in a pattern. The apparatus further includes a gas pressure controller configured to individually control a gas flow rate through each of the plurality of gas distribution features to spatially modulate a gas pressure distribution in a space between the clamp and the object. The gas distribution features include a plurality of trenches or holes arranged in an array form.

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