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    • 6. 发明授权
    • Apparatus and method for inspection and testing of flat panel display substrates
    • 平板显示器基板检查和测试的装置和方法
    • US07435956B2
    • 2008-10-14
    • US11225376
    • 2005-09-12
    • N. William Parker
    • N. William Parker
    • H01J37/28H01J37/147
    • H01J37/256H01J9/42H01J37/09H01J37/147H01J37/244H01J2237/0492H01J2237/1501H01J2237/162H01J2237/188H01J2237/24475H01J2237/2448H01J2237/2594H01J2237/2817
    • A charged particle optical system for testing, imaging or inspecting substrates comprises: a charged particle optical assembly configured to produce a line of charged particle beams equally spaced along a main scan axis, each beam being deflectable through a large angle along the main scan axis; and linear detector optics aligned along the main scan axis. The detector optics includes a linear secondary electron detector, a field free tube, voltage contrast plates and a linear backscattered electron detector. The large beam deflection is achieved using an electrostatic deflector for which the exit aperture is larger than the entrance aperture. One embodiment of the deflector includes: two parallel plates with chamfered inner surfaces disposed perpendicularly to the main scan axis; and a multiplicity of electrodes positioned peripherally in the gap between the plates, the electrodes being configured to maintain a uniform electric field transverse to the main scan axis.
    • 用于测试,成像或检查基板的带电粒子光学系统包括:带电粒子光学组件,被配置为产生沿主扫描轴等距间隔的带电粒子束线,每个束可沿主扫描轴线以大角度偏转; 以及沿主扫描轴对准的线性检测器光学元件。 检测器光学器件包括线性二次电子检测器,无磁场管,电压对比板和线性背散射电子检测器。 使用静电偏转器实现大的光束偏转,出射孔大于入射孔。 偏转器的一个实施例包括:具有与主扫描轴垂直设置的倒角内表面的两个平行板; 以及多个电极位于板之间的间隙周边,电极被配置为保持横向于主扫描轴的均匀电场。