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    • 7. 发明授权
    • Apparatus and methods for end point determination in reactive ion etching
    • 用于反应离子蚀刻终点测定的装置和方法
    • US08445296B2
    • 2013-05-21
    • US13189287
    • 2011-07-22
    • Chien Rhone WangTzu-Cheng LinYu-Jen ChengChih-Wei LaiHung-Pin ChangTsang-Jiuh Wu
    • Chien Rhone WangTzu-Cheng LinYu-Jen ChengChih-Wei LaiHung-Pin ChangTsang-Jiuh Wu
    • H01L21/02
    • H01J37/32963
    • Methods and apparatus for performing end point determination. A method includes receiving a wafer into an etch tool chamber for performing an RIE etch; beginning the RIE etch to form vias in the wafer; receiving in-situ measurements of one or more physical parameters of the etch tool chamber that are correlated to the RIE etch process; providing a virtual metrology model for the RIE etch in the chamber; inputting the received in-situ measurements to the virtual metrology model for the RIE etch in the chamber; executing the virtual metrology model to estimate the current via depth; comparing the estimated current via depth to a target depth; and when the comparing indicates the current via depth is within a predetermined threshold of the target depth; outputting a stop signal. An apparatus for use with the method embodiment is disclosed.
    • 执行终点确定的方法和装置。 一种方法包括将晶片接收到用于进行RIE蚀刻的蚀刻工具室中; 开始RIE蚀刻以在晶片中形成通孔; 接收与RIE蚀刻工艺相关的蚀刻工具室的一个或多个物理参数的原位测量; 为腔室中的RIE蚀刻提供虚拟计量模型; 将接收到的原位测量值输入到腔室中的RIE蚀刻的虚拟测量模型; 执行虚拟计量模型以通过深度估计电流; 将经过深度的估计电流与目标深度进行比较; 并且当比较指示当前经过深度在目标深度的预定阈值内时; 输出停止信号。 公开了一种用于该方法实施例的装置。