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    • 4. 发明授权
    • Method and apparatus for enhancing endpoint detection of a via etch
    • 用于增强通孔蚀刻的端点检测的方法和装置
    • US06555396B1
    • 2003-04-29
    • US10097159
    • 2002-03-13
    • Ailian ZhaoJohn A. IacoponiThomas E. Spikes, Jr.
    • Ailian ZhaoJohn A. IacoponiThomas E. Spikes, Jr.
    • H01L2100
    • H01L21/31116
    • A method is provided to enhance endpoint detection during via etching in the processing of a semiconductor wafer. The method includes forming a first process layer and a second process layer above the first process layer. A first masking layer is formed above at least a portion of the second process layer, leaving an outer edge portion of at least the second process layer exposed. Thereafter, an etching process is used to remove the outer edge portion of the first and second layers. Once the etching is complete, the first masking layer is removed, and a second masking layer is formed above the second process layer. The second masking layer is patterned to expose portions of the first process layer, and then an etching process substantially removes the exposed portions of the first process layer to form the vias.
    • 提供了一种在半导体晶片的处理中增强通孔蚀刻期间的端点检测的方法。 该方法包括在第一处理层上形成第一处理层和第二处理层。 第一掩模层形成在第二工艺层的至少一部分之上,留下至少第二工艺层的外边缘部分露出。 此后,使用蚀刻工艺去除第一和第二层的外边缘部分。 蚀刻完成后,去除第一掩模层,并在第二工艺层上方形成第二掩模层。 图案化第二掩模层以暴露第一工艺层的部分,然后蚀刻工艺基本上去除第一工艺层的暴露部分以形成通路。