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    • 6. 发明申请
    • Methods of forming integrated circuit devices having metal interconnect layers therein
    • 形成其中具有金属互连层的集成电路器件的方法
    • US20070045123A1
    • 2007-03-01
    • US11216686
    • 2005-08-31
    • Duk HongKyoung LeeMarkus NaujokRoman Knoefler
    • Duk HongKyoung LeeMarkus NaujokRoman Knoefler
    • C25D5/02
    • C25D5/022H01L21/31144H01L21/76802H01L21/76877H01L23/485H01L2924/0002H01L2924/00
    • Methods of forming metal interconnect layers include forming an electrically insulating layer having a contact hole therein, on a semiconductor substrate and then forming a recess in the electrically insulating layer, at a location adjacent the contact hole. The contact hole and the recess are then filled with a first electrically conductive material (e.g., tungsten (W)). At least a portion of the first electrically conductive material within the contact hole is then exposed. This exposure occurs by etching back a portion of the electrically insulating layer using the first electrically conductive material within the contact hole and within the recess as an etching mask. The first electrically conductive material within the recess is then removed to expose another portion of the electrically insulating layer. Following this, the exposed portion of the first electrically conductive material is covered with a second electrically conductive material (e.g., copper (Cu)), which directly contacts the exposed portion of the first electrically conductive material. This covering step results in the definition of a wiring pattern including the first and second electrically conductive materials.
    • 形成金属互连层的方法包括在半导体衬底上形成其中具有接触孔的电绝缘层,然后在邻近接触孔的位置在电绝缘层中形成凹陷。 然后用第一导电材料(例如,钨(W))填充接触孔和凹部。 然后露出接触孔内的第一导电材料的至少一部分。 通过使用接触孔内部和凹部内的第一导电材料作为蚀刻掩模来蚀刻电绝缘层的一部分而发生该曝光。 然后移除凹槽内的第一导电材料以露出电绝缘层的另一部分。 之后,第一导电材料的暴露部分被直接接触第一导电材料的暴露部分的第二导电材料(例如铜(Cu))覆盖。 该覆盖步骤导致包括第一和第二导电材料的布线图案的定义。