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    • 4. 发明授权
    • Method for detecting sloped contact holes using a critical-dimension waveform
    • 使用临界尺寸波形检测倾斜接触孔的方法
    • US06277661B1
    • 2001-08-21
    • US09677955
    • 2000-10-02
    • Jean YangIan DudleyKhoi Phan
    • Jean YangIan DudleyKhoi Phan
    • H01L2166
    • H01L22/26H01L22/12
    • A method for contact hole formation and inspection during integrated circuit fabrication is disclosed. The method includes defining tolerances for one or more contact hole formation processes, and then performing the formation processes to create at least one contact hole. After at least one of the formation processes is performed, a waveform is generated for the contact hole. A critical dimension (CD) and an edge width value are then generated for the contact hole from the waveform. The CD and the edge width value are then compared to the tolerances to detect and correct variations in the formation process. In a further aspect of the present invention, the edge width is compared to a predetermined limit to automatically detect contact holes having sloped sidewalls.
    • 公开了一种在集成电路制造期间接触孔形成和检查的方法。 该方法包括确定一个或多个接触孔形成过程的公差,然后执行形成过程以产生至少一个接触孔。 在执行至少一个形成处理之后,产生用于接触孔的波形。 然后为波形的接触孔产生临界尺寸(CD)和边缘宽度值。 然后将CD和边缘宽度值与公差进行比较,以检测和纠正形成过程中的变化。 在本发明的另一方面,将边缘宽度与预定极限进行比较,以自动检测具有倾斜侧壁的接触孔。