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    • 8. 发明授权
    • Method of forming integrated circuit features by oxidation of titanium hard mask
    • 通过钛硬掩模氧化形成集成电路特征的方法
    • US06475867B1
    • 2002-11-05
    • US09824416
    • 2001-04-02
    • Angela T. HuiKouros GhandehariBhanwar Singh
    • Angela T. HuiKouros GhandehariBhanwar Singh
    • H07L21336
    • H01L21/31144H01L21/0337H01L21/0338
    • An exemplary method of forming integrated circuit device features by oxidization of titanium hard mask is described. This method can include providing a photoresist pattern of photoresist features over a first layer of material deposited over a second layer of material; etching the first layer of material according to the photoresist pattern to form material features; oxidizing exposed portions of the material features where the material features are made of a material which expands during oxidation; and etching the second layer of material according to the material features which have expanded as a result of oxidation. Advantageously, the expansion of the material features results in a smaller distance between material features than the distance between photoresist features.
    • 描述了通过钛硬掩模的氧化形成集成电路器件特征的示例性方法。 该方法可以包括在沉积在第二材料层上的第一材料层上提供光致抗蚀剂特征的光致抗蚀剂图案; 根据光致抗蚀剂图案蚀刻第一层材料以形成材料特征; 氧化材料特征的暴露部分,其中材料特征由在氧化期间膨胀的材料制成; 并根据由于氧化而膨胀的材料特征蚀刻第二层材料。 有利地,材料特征的扩展导致材料特征之间的距离比光致抗蚀剂特征之间的距离更小。