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    • 31. 发明授权
    • Tapered edge bead removal process for immersion lithography
    • 用于浸没式光刻的锥形边缘珠去除工艺
    • US07824846B2
    • 2010-11-02
    • US11857764
    • 2007-09-19
    • Colin J. Brodsky
    • Colin J. Brodsky
    • G03F7/26
    • G03F7/2028G03F7/70341
    • A method and apparatus for forming a tapered photoresist edge. The method includes: forming a photoresist layer on a substrate; exposing a first annular region of the photoresist layer adjacent to a perimeter of the substrate to actinic radiation, the first annular region having a first outer perimeter proximate to a perimeter of the substrate and a first inner perimeter away from the perimeter of the substrate, the actinic radiation gradually decreasing in intensity from the first outer perimeter to the first inner perimeter; and developing the exposed first annular region of the photoresist layer to form a tapered profile in a second annular region of the photoresist layer, the second annular region having a second perimeter proximate to the perimeter of the substrate and a second inner perimeter away from the substrate perimeter, the profile gradually increasing in thickness from the second outer perimeter to the second inner perimeter.
    • 一种用于形成锥形光致抗蚀剂边缘的方法和装置。 该方法包括:在基板上形成光致抗蚀剂层; 将光致抗蚀剂层的与衬底的周边相邻的第一环形区域暴露于光化辐射,第一环形区域具有靠近衬底的周边的第一外周边和远离衬底的周边的第一内周边, 光化辐射从第一外围到第一内周的强度逐渐降低; 以及显影所述光致抗蚀剂层的暴露的第一环形区域以在所述光致抗蚀剂层的第二环形区域中形成锥形轮廓,所述第二环形区域具有邻近所述基底的周边的第二周边和离开所述基底的第二内周边 轮廓,轮廓的厚度从第二外周边逐渐增加到第二内周。