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    • 6. 发明授权
    • Method for manufacturing a semiconductor device
    • 半导体器件的制造方法
    • US06509273B1
    • 2003-01-21
    • US09527751
    • 2000-03-17
    • Toshinori ImaiNaofumi OhashiYoshio HommaSeiichi Kondo
    • Toshinori ImaiNaofumi OhashiYoshio HommaSeiichi Kondo
    • H01L21302
    • H01L21/7684H01L21/02074H01L21/3212
    • Problematic dishing and erosion in forming embedded metal interconnection by a chemical mechanical polishing (CMP) method are suppressed. Formation of embedded Cu interconnects 46a to 46e by chemical mechanical polishing of a Cu film 46 formed in interconnect trenches 40 to 44 is performed by abrasive-grain-free chemical mechanical polishing using a polishing liquid of an abrasive grain content less than 0.5 wt % (CMP of the first step); with-abrasive-grain chemical mechanical polishing using a polishing liquid of an abrasive grain content of 0.5 or more wt % (CMP of the second step); and selective chemical mechanical polishing using a polishing liquid to which an anticorrosive such as benzotriazole (BTA) is added (CMP of the third step).
    • 通过化学机械抛光(CMP)方法形成嵌入金属互连的问题的凹陷和侵蚀被抑制。通过在互连沟槽40至44中形成的Cu膜46的化学机械抛光来形成嵌入的Cu互连46a至46e, 使用磨料颗粒含量小于0.5重量%(第一步骤的CMP)的抛光液的无颗粒化学机械抛光; 使用磨料颗粒含量为0.5重量%以上的研磨液(第二工序的CMP)进行磨粒化学机械研磨; 以及使用添加了抗腐蚀剂如苯并三唑(BTA)的抛光液进行选择性化学机械抛光(第三步骤的CMP)。