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    • 9. 发明专利
    • Pattern shape evaluation method, semiconductor device manufacturing method, and pattern shape evaluation device
    • 图案形状评估方法,半导体器件制造方法和图案形状评估装置
    • JP2014130077A
    • 2014-07-10
    • JP2012287906
    • 2012-12-28
    • Hitachi High-Technologies Corp株式会社日立ハイテクノロジーズ
    • FUKUDA HIROSHI
    • G01B15/04H01J37/22H01L21/027H01L21/66
    • H01J37/285G01B15/04G01B2210/56H01J37/222H01J37/265H01J37/28H01J2237/221H01J2237/24578H01J2237/24592H01L22/12H01L2924/0002H01L2924/00
    • PROBLEM TO BE SOLVED: To estimate and evaluate the cross-sectional shape or three-dimensional shape of a circuit pattern only from a planar image of the circuit pattern that is observed from above a wafer.SOLUTION: A pattern shape evaluation method of the present invention executes the following steps: applying a converging energy ray from a direction that is nearly perpendicular to a main surface of a substrate on the top surface of which a three-dimensional structure is formed, scanning it on the top surface of the substrate, and detecting and/or measuring the strength of a secondary energy ray generated from the substrate and structure or the strength of an energy ray reflected or scattered by the substrate and structure, thereby obtaining a top-surface observation image of the structure; obtaining uncertainty information of the scattering intensity due to the uneven shape of the surface of the structure from an application position of the converging energy ray in the top-surface observation image and from the measured strength; obtaining an inclination angle θ of the surface of the structure on the basis of the obtained uncertainty information; and estimating the three-dimensional shape of the structure on the basis of the obtained inclination angle θ.
    • 要解决的问题:仅从晶片上方观察的电路图形的平面图像估计和评估电路图案的截面形状或三维形状。解决方案:本发明的图案形状评估方法 本发明执行以下步骤:在其顶表面上形成三维结构的基板的主表面几乎垂直的方向上施加会聚能量射线,在基板的顶表面上扫描; 检测和/或测量由基板和结构产生的二次能量射线的强度或由基底和结构反射或散射的能量射线的强度,从而获得该结构的顶表面观察图像; 从顶面观察图像中的会聚能量射线的施加位置和测量强度获得由于结构表面的不均匀形状引起的散射强度的不确定性信息; 获得倾斜角度和角度; 在获得的不确定性信息的基础上,对结构表面进行分析; 并且基于获得的倾斜角度来估计结构的三维形状。