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    • 10. 发明授权
    • Megasonic resonator for disk cleaning and method for use thereof
    • 用于磁盘清洗的超声波谐振器及其使用方法
    • US06460551B1
    • 2002-10-08
    • US09430345
    • 1999-10-29
    • Boris FishkinAlexander LernerJianshe TangBrian J. Brown
    • Boris FishkinAlexander LernerJianshe TangBrian J. Brown
    • B08B312
    • H01L21/67057B08B3/12G10K11/28Y10S134/902
    • A Megasonic cleaning apparatus having at least one reflector (e.g., a parabolic or paraboloid reflector) positioned to collect otherwise wasted cleaning energy and redirect that energy to one or a plurality of positions on a wafer's edge is provided. A first embodiment comprises a complex parabolic reflector which has a width greater than that of the wafer and a preferred length approximately equal to the diameter of the wafer, and which is shaped to provide focal points which vary along the length of the parabolic reflector, such that energy striking the reflector at different points along the reflector's length is directed to a plurality of different points along the wafer's edge. A second embodiment comprises a simple parabolic reflector having a width greater than that of the wafer and a preferred length less than the diameter of the wafer, and which is provided to focus at a cord along the wafer's surface, effectively focusing cleaning energy on two points along the wafer's edge at any given time. Yet another embodiment of the invention comprises a paraboloid reflector having a width greater than that of the wafer and a preferred length which is substantially less than the diameter of the wafer and which is shaped to focus all collected energy to a single point on the wafer's edge. Multiple such reflectors may be positioned in the cleaning tank to optimize energy usage and wafer cleaning.
    • 提供了一种具有至少一个反射器(例如,抛物面或抛物面反射器)的超声波清洗装置,其被定位成收集另外浪费的清洁能量并将该能量重定向到晶片边缘上的一个或多个位置。 第一实施例包括复杂的抛物面反射器,其宽度大于晶片的宽度,并且优选的长度近似等于晶片的直径,并且其被成形为提供沿着抛物面反射器的长度变化的焦点, 沿着反射器长度的不同点撞击反射器的能量被引导到沿着晶片边缘的多个不同点。 第二实施例包括具有大于晶片宽度的宽度的简单抛物面反射器,并且具有小于晶片直径的优选长度,并且其设置成沿着晶片表面聚焦在绳索处,有效地将清洁能量聚焦在两点上 在任何给定的时间沿晶圆的边缘。 本发明的另一个实施例包括具有大于晶片宽度的宽度的抛物面反射器,其优选长度基本上小于晶片的直径,并且其被成形为将所有收集的能量聚焦到晶片边缘上的单个点 。 可以将多个这样的反射器定位在清洁槽中以优化能量使用和晶片清洁。