Method for corrosion prevention during planarization
    6.
    发明授权
    Method for corrosion prevention during planarization 有权
    平面化期间的防腐蚀方法

    公开(公告)号:US07947604B2

    公开(公告)日:2011-05-24

    申请号:US12019647

    申请日:2008-01-25

    IPC分类号: H01L21/302

    CPC分类号: B24B37/042 B24B37/046

    摘要: The present invention relates to the reduction or complete prevention of Cu corrosion during a planarization or polishing process. In one aspect of the invention, RF signal is used to establish a negative bias in front of the wafer surface following polishing to eliminate Cu+ or Cu2+ migrations. In another aspect of the invention, a DC Voltage power supply is used to establish the negative bias.

    摘要翻译: 本发明涉及在平坦化或抛光过程中减少或完全防止Cu腐蚀。 在本发明的一个方面中,RF信号用于在抛光之后在晶片表面前建立负偏压以消除Cu +或Cu 2+迁移。 在本发明的另一方面,使用DC电压电源来建立负偏压。