Chemical mechanical polishing (CMP) slurry for copper and method of use
in integrated circuit manufacture
    2.
    发明授权
    Chemical mechanical polishing (CMP) slurry for copper and method of use in integrated circuit manufacture 失效
    用于铜的化学机械抛光(CMP)浆料和集成电路制造中的使用方法

    公开(公告)号:US5897375A

    公开(公告)日:1999-04-27

    申请号:US954190

    申请日:1997-10-20

    摘要: A method for chemical mechanical polishing (CMP) a copper layer (22) begins by forming the copper layer (22). The copper layer (22) is then exposed to a slurry (24). The slurry (24) contains an oxidizing agent such as H.sub.2 O.sub.2, a carboxylate salt such as ammonium citrate, an abrasive slurry such as alumna abrasive, an optional triazole or triazole derivative, and a remaining balance of a solvent such as deionized water. The use of the slurry (24) polishes the copper layer (22) with a high rate of removal whereby pitting and corrosion of the copper layer (22) is reduced and good copper interconnect planarity is achieved. This slurry (24) has good selectivity of copper to oxide, and results in copper devices which have good electrical performance. In addition, disposal of the slurry (24) is not environmentally difficult since the slurry (24) is environmentally sound when compared to other prior art slurries.

    摘要翻译: 通过形成铜层(22)开始化学机械抛光(CMP)铜层(22)的方法。 然后将铜层(22)暴露于浆料(24)。 浆料(24)含有氧化剂如H 2 O 2,羧酸盐如柠檬酸铵,研磨浆如校准研磨剂,任选的三唑或三唑衍生物,剩余的溶剂如去离子水。 浆料(24)的使用以高的去除速度抛光铜层(22),从而降低了铜层(22)的点蚀和腐蚀,并实现了良好的铜互连平面性。 这种浆料(24)具有铜对氧化物的良好选择性,并且导致具有良好电性能的铜器件。 此外,浆料(24)的处理不是环境困难的,因为与其它现有技术的浆料相比,浆料(24)是无害环境的。

    Chemical mechanical polishing (CMP) slurry for polishing copper
interconnects which use tantalum-based barrier layers
    3.
    发明授权
    Chemical mechanical polishing (CMP) slurry for polishing copper interconnects which use tantalum-based barrier layers 失效
    用于抛光使用钽基阻挡层的铜互连的化学机械抛光(CMP)浆料

    公开(公告)号:US6001730A

    公开(公告)日:1999-12-14

    申请号:US954191

    申请日:1997-10-20

    摘要: A method for forming a copper interconnect on an integrated circuit (IC) begins by forming a dielectric layer (20) having an opening. A tantalum-based barrier layer (21), such as TaN or TaSiN, is formed within the opening in the layer (20). A copper layer (22) is formed over the barrier layer (21). A first CMP process is used to polish the copper (22) to expose portions of the barrier (21). A second CMP process which is different from the first CMP process is then used to polish exposed portions of the layer (21) faster than the dielectric layer (20) or the copper layer (22). After this two-step CMP process, a copper interconnect having a tantalum-based barrier is formed across the integrated circuit substrate (12).

    摘要翻译: 在集成电路(IC)上形成铜互连的方法通过形成具有开口的电介质层(20)开始。 在层(20)的开口内形成有TaN或TaSiN等钽系阻挡层(21)。 在阻挡层(21)的上方形成铜层(22)。 第一CMP工艺用于抛光铜(22)以暴露阻挡层(21)的部分。 然后使用与第一CMP工艺不同的第二CMP工艺来比电介质层(20)或铜层(22)更快地抛光层(21)的暴露部分。 在该两步CMP工艺之后,跨越集成电路基板(12)形成具有钽基阻挡层的铜互连。

    Method for polishing a semiconductor wafer using dynamic control
    4.
    发明授权
    Method for polishing a semiconductor wafer using dynamic control 失效
    使用动态控制来研磨半导体晶片的方法

    公开(公告)号:US5882243A

    公开(公告)日:1999-03-16

    申请号:US839996

    申请日:1997-04-24

    CPC分类号: B24B37/005 B24B49/04

    摘要: A polishing system (10) is used to polish a semiconductor wafer (16) in accordance with the present invention. Polishing system (10) includes a wafer carrier (14) which includes a modulation unit (20). Modulation unit (20) includes a plurality of capacitors made up of a flexible lower plate (22) and a plurality of smaller upper plate segments (24). A controller (40) monitors the capacitance between each smaller upper plate segment (24) and lower plate (22), and compares the measured capacitance against a predefined set capacitance. To the extent the measured capacitance and predefined capacitance are different, controller (40) adjusts the voltage being applied to the respective upper plate segment (24) so that the measured capacitance and predefined capacitance are aligned. Thus, the present invention is able to achieve dynamic and localized control of the shape of the wafer as it is being polished.

    摘要翻译: 根据本发明,抛光系统(10)用于抛光半导体晶片(16)。 抛光系统(10)包括包括调制单元(20)的晶片载体(14)。 调制单元(20)包括由柔性下板(22)和多个较小的上板段(24)组成的多个电容器。 控制器(40)监测每个较小的上板段(24)和下板(22)之间的电容,并将测量的电容与预定的设定电容进行比较。 在测量电容和预定电容不同的程度上,控制器(40)调节施加到相应的上板段(24)的电压,使得所测量的电容和预定电容对齐。 因此,本发明能够在抛光时实现晶片的形状的动态和局部控制。