NOVEL METHOD FOR FOUR DIRECTION LOW CAPACITANCE ESD PROTECTION
    1.
    发明申请
    NOVEL METHOD FOR FOUR DIRECTION LOW CAPACITANCE ESD PROTECTION 有权
    四方向低电容ESD保护的新方法

    公开(公告)号:US20070108527A1

    公开(公告)日:2007-05-17

    申请号:US11622574

    申请日:2007-01-12

    IPC分类号: H01L23/62

    CPC分类号: H01L27/0255

    摘要: The invention describes a structure and a process for providing ESD semiconductor protection with reduced input capacitance. The structure consists of heavily doped P+ guard rings surrounding the I/O ESD protection device and the Vcc to Bss protection device. In addition, there is a heavily doped N+ guard ring surrounding the I/O protection device its P+ guard ring. The guard rings enhance structure diode elements providing enhanced ESD energy discharge path capability enabling the elimination of a specific conventional Vss to I/O pad ESD protection device. This reduces the capacitance seen by the I/O circuit while still providing adequate ESD protection for the active circuit devices.

    摘要翻译: 本发明描述了一种用于提供具有降低的输入电容的ESD半导体保护的结构和工艺。 该结构由围绕I / O ESD保护器件和Vcc至Bss保护器件的重掺杂P +保护环组成。 另外,在I / O保护器件的P +保护环周围还有一个重掺杂的N +保护环。 保护环增强结构二极管元件,提供增强的ESD能量放电路径能力,从而能够消除特定的常规Vss至I / O焊盘ESD保护器件。 这降低了I / O电路所看到的电容,同时为有源电路器件提供足够的ESD保护。