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    • 7. 发明授权
    • Method and apparatus for detecting end point
    • 检测终点的方法和装置
    • US07026173B2
    • 2006-04-11
    • US10858402
    • 2004-06-02
    • Takeshi YamashitaTakao Yamaguchi
    • Takeshi YamashitaTakao Yamaguchi
    • H01L21/00
    • G03F7/70608H01J37/32935
    • A mask layer and a to-be-processed layer are irradiated with light to measure interference light formed of reflected lights from the mask layer and reflected lights from the to-be-processed layer. Thereafter, an interference component brought by the mask layer is removed from the waveform of the measured interference light, thereby calculating the waveform of the interference light brought by the to-be-processed layer. The thickness of the remaining to-be-processed layer is determined on the basis of the calculated waveform of the interference light and the thickness of the remaining to-be-processed layer is compared with a desired thickness thereof. In this way, an end point of processing on the to-be-processed layer is detected.
    • 用光照射掩模层和待处理层,以测量由掩模层反射的光和来自待处理层的反射光形成的干涉光。 然后,从测定的干涉光的波形中除去由掩模层带来的干涉成分,计算被处理层带来的干涉光的波形。 基于干涉光的计算波形确定剩余待处理层的厚度,并将剩余待处理层的厚度与其期望厚度进行比较。 以这种方式,检测待处理层的处理终点。
    • 9. 发明授权
    • Method and apparatus for detecting end point
    • 检测终点的方法和装置
    • US07377992B2
    • 2008-05-27
    • US11340540
    • 2006-01-27
    • Takeshi YamashitaTakao Yamaguchi
    • Takeshi YamashitaTakao Yamaguchi
    • C23F1/00
    • G03F7/70608H01J37/32935
    • A mask layer and a to-be-processed layer are irradiated with light to measure interference light formed of reflected lights from the mask layer and reflected lights from the to-be-processed layer. Thereafter, an interference component brought by the mask layer is removed from the waveform of the measured interference light, thereby calculating the waveform of the interference light brought by the to-be-processed layer. The thickness of the remaining to-be-processed layer is determined on the basis of the calculated waveform of the interference light and the thickness of the remaining to-be-processed layer is compared with a desired thickness thereof. In this way, an end point of processing on the to-be-processed layer is detected.
    • 用光照射掩模层和待处理层,以测量由掩模层反射的光和来自待处理层的反射光形成的干涉光。 然后,从测定的干涉光的波形中除去由掩模层带来的干涉成分,计算被处理层带来的干涉光的波形。 基于干涉光的计算波形确定剩余待处理层的厚度,并将剩余待处理层的厚度与其期望厚度进行比较。 以这种方式,检测待处理层的处理终点。