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    • 7. 发明申请
    • MULTIPLE MATCHING REFERENCE SPECTRA FOR IN-SITU OPTICAL MONITORING
    • 用于原位光学监测的多重匹配参考光谱
    • WO2012054263A3
    • 2012-06-28
    • PCT/US2011055814
    • 2011-10-11
    • APPLIED MATERIALS INCZHANG JIMINWANG ZHIHONGLEE HARRY QTU WEN-CHIANG
    • ZHANG JIMINWANG ZHIHONGLEE HARRY QTU WEN-CHIANG
    • H01L21/304H01L21/66
    • B24B37/013B24B49/12
    • A method of controlling polishing includes storing a plurality libraries, each library including a plurality of reference spectra, polishing a substrate, measuring a sequence of spectra of light from the substrate during polishing, and for each measured spectrum of the sequence of spectra, finding a best matching first reference spectrum from a first library from the plurality of libraries and finding a best matching second reference spectrum from a different second library from the plurality of libraries, determining a first value associated with the best matching first reference spectrum and determining a second value from the best matching second reference spectrum, and calculating a third value from the first value and the second value to generate a sequence of calculated third values. At least one of a polishing endpoint or an adjustment for a polishing rate can be determined based on the sequence of calculated third values.
    • 控制抛光的方法包括存储多个库,每个库包括多个参考光谱,抛光衬底,在抛光期间测量来自衬底的光的光谱序列,并且对于光谱序列的每个测量光谱,找到 最佳匹配来自所述多个库中的第一库的第一参考谱,并且从所述多个库中的不同第二库找到最佳匹配的第二参考谱,确定与所述最佳匹配的第一参考谱相关联的第一值,以及确定第二值 从最佳匹配的第二参考频谱中计算第三值,并且从第一值和第二值计算第三值以生成计算的第三值的序列。 基于所计算的第三值的顺序,可以确定抛光终点或抛光速率的调整中的至少一个。
    • 8. 发明申请
    • SPECTROGRAPHIC MONITORING USING INDEX TRACKING AFTER DETECTION OF LAYER CLEARING
    • 在检测到分层后,使用索引跟踪进行光谱监测
    • WO2012019040A3
    • 2012-05-10
    • PCT/US2011046642
    • 2011-08-04
    • APPLIED MATERIALS INCZHANG JIMINWANG ZHIHONGLEE HARRY QTU WEN-CHIANG
    • ZHANG JIMINWANG ZHIHONGLEE HARRY QTU WEN-CHIANG
    • H01L21/304H01L21/66
    • B24B37/042B24B37/013B24B49/12
    • A method of controlling polishing includes storing a library having a plurality of reference spectra, each reference spectrum of the plurality of reference spectra having a stored associated index value, polishing a substrate having a second layer overlying a first layer, measuring a sequence of spectra of light from the substrate during polishing, for each measured spectrum of the sequence of spectra, finding a best matching reference spectrum to generate a sequence of best matching reference spectra, determining the associated index value for each best matching spectrum from the sequence of best matching reference spectra to generate a sequence of index values, detecting exposure of the first layer, fitting a function to a portion of the sequence of index values corresponding to spectra measured after detection of exposure of the first layer, and determining a polishing endpoint or an adjustment for a polishing rate based on the function.
    • 控制抛光的方法包括存储具有多个参考光谱的库,所述多个参考光谱中的每个参考光谱具有存储的相关索引值,抛光具有覆盖第一层的第二层的衬底,测量光谱序列 对抛光期间来自衬底的光,针对光谱序列的每个测量光谱,找到最佳匹配参考光谱以生成最佳匹配参考光谱的序列,从最佳匹配参考序列中确定每个最佳匹配光谱的相关索引值 光谱以生成一系列索引值,检测第一层的曝光,将功能拟合至与在检测到第一层的曝光之后测量的光谱相对应的索引值序列的一部分,以及确定抛光终点或 基于功能的抛光速率。