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    • 4. 发明授权
    • Method for producing a phase shift mask
    • 用于制造相移掩模的方法
    • US06841316B2
    • 2005-01-11
    • US10185281
    • 2002-06-27
    • Christian Crell
    • Christian Crell
    • G03F1/00G03C5/00G03F9/00
    • G03F1/26
    • To avoid charging effects of isolated chromium structures during the structuring of a second level of attenuated phase shift masks, a previous chromium etching step is preferably carried out in a time-controlled manner, so that a residual chromium layer, which is approximately 5-20 nm thick, remains at the bottom of the columns. The residual chromium layer connects the chromium webs, which are otherwise isolated, in a conductive manner and therefore dissipates the charge to the outside during the subsequent structuring by an electron beam. In the process steps that follow the exposure of the second level—preferably of alternating attenuated phase shift masks—two further chromium etching steps can be carried out, with a small etching depth in each case in the columns provided for the quartz etching of different phase shift.
    • 为了避免分离的铬结构在第二水平的衰减相移掩模的构造期间的充电效应,先前的铬蚀刻步骤优选以时间控制的方式进行,使得残留的铬层约为5-20 nm厚,保留在色谱柱的底部。 残留的铬层以导电的方式连接另外被隔离的铬网,从而在随后的电子束构造期间将电荷消散到外部。 在第二级曝光之后的工艺步骤(优选交替的衰减相移掩模)中,可以执行两个另外的铬蚀刻步骤,每个情况下,在为不同相的石英蚀刻提供的列中具有小的蚀刻深度 转移。
    • 5. 发明授权
    • Method for inspecting defects on a mask
    • 检查面罩缺陷的方法
    • US06970589B2
    • 2005-11-29
    • US10060450
    • 2002-01-30
    • Christian Crell
    • Christian Crell
    • G01N21/956G03F1/00G06K9/00
    • G03F1/84G01N21/95607
    • The whole-area defect inspection of masks is made possible by interconnecting two otherwise independent defect inspection systems via a powerful bus system or interface. As a result, two masks that are identical, at least in sub-areas, can be inspected and compared in parallel and in real time. It is not necessary to temporarily store large quantities of data. The running defect inspection can be interrupted flexibly and continued again. This implementation of mask-to-mask inspection takes into account that simulation algorithms for die-to-database inspection of future mask technology, for example, alternating phase masks, EUV masks, stencil masks, and so on are not available in good time. In addition, the inspection time is reduced considerably.
    • 通过强大的总线系统或接口将两个独立的缺陷检测系统相互连接,可以实现掩模的全面缺陷检查。 结果,至少在子区域中相同的两个掩模可以被并行和实时地检查和比较。 不需要临时存储大量的数据。 运行缺陷检查可以灵活地中断并继续。 掩模对掩模检查的这种实现考虑到未来掩模技术的模数到数据库检查的模拟算法,例如交替相位掩模,EUV掩模,模板掩模等不能及时获得。 此外,检查时间大大减少。