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    • 3. 发明授权
    • Method for inspecting critical dimension uniformity at high speed measurement
    • 在高速测量时检查临界尺寸均匀度的方法
    • US08213722B2
    • 2012-07-03
    • US12607238
    • 2009-10-28
    • Hee-Bom KimMyoung-Soo LeeYoung-Su Sung
    • Hee-Bom KimMyoung-Soo LeeYoung-Su Sung
    • G06K9/68
    • G06T7/0006G03F1/86G03F7/70625G06T2207/30148
    • A method for inspecting a uniformity of CD (CD) of a photo mask pattern increases a production yield. The method obtains a CD by precisely measuring a photo mask by using, an electron microscope. Then, a measurement image having, a plurality of patterns formed in the photo mask is obtained by photographing the photo mask at a high speed through an optical microscope. A gray level based on the CD is calculated by capturing just a pattern area in the measurement image, and an estimated value and a correlation coefficient is obtained, when an open density of the measurement image is relatively low. Accordingly, a uniformity of CD can be confirmed more clearly in a measurement of high speed for a measurement image having a relatively low open density.
    • 用于检查光掩模图案的CD(CD)的均匀性的方法提高了产量。 该方法通过使用电子显微镜精确测量光掩模来获得CD。 然后,通过光学显微镜以高速拍摄光掩模,获得具有形成在光掩模中的多个图案的测量图像。 当测量图像的开放密度相对较低时,通过仅捕获测量图像中的图案区域来计算基于CD的灰度级,并且获得估计值和相关系数。 因此,对于具有较低开放密度的测量图像的高速测量,可以更清楚地确认CD的均匀性。