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    • 10. 发明授权
    • Method for forming contact holes
    • 形成接触孔的方法
    • US08835324B2
    • 2014-09-16
    • US13174875
    • 2011-07-01
    • Chieh-Te ChenYi-Po LinFeng-Yih ChangChih-Wen FengShang-Yuan Tsai
    • Chieh-Te ChenYi-Po LinFeng-Yih ChangChih-Wen FengShang-Yuan Tsai
    • H01L21/311H01L21/768
    • H01L21/31144H01L21/76816
    • In an exemplary method for forming contact holes, a substrate overlaid with an etching stop layer and an interlayer dielectric layer in that order is firstly provided. A first etching process then is performed to form at least a first contact opening in the interlayer dielectric layer. A first carbon-containing dielectric layer subsequently is formed overlying the interlayer dielectric layer and filling into the first contact opening. After that, a first anti-reflective layer and a first patterned photo resist layer are sequentially formed in that order overlying the carbon-containing dielectric layer. Next, a second etching process is performed by using the first patterned photo resist layer as an etching mask to form at least a second contact opening in the interlayer dielectric layer.
    • 在形成接触孔的示例性方法中,首先提供覆盖有蚀刻停止层和层间电介质层的基板。 然后执行第一蚀刻工艺以在层间电介质层中形成至少第一接触开口。 随后形成第一含碳介电层,覆盖层间电介质层并填充到第一接触开口中。 之后,依次形成第一抗反射层和第一图案化光致抗蚀剂层,以覆盖含碳电介质层的顺序。 接下来,通过使用第一图案化光致抗蚀剂层作为蚀刻掩模来进行第二蚀刻工艺,以在层间电介质层中形成至少第二接触开口。