Charge balance field effect transistor
    4.
    发明授权
    Charge balance field effect transistor 有权
    电荷平衡场效应晶体管

    公开(公告)号:US07393749B2

    公开(公告)日:2008-07-01

    申请号:US11450903

    申请日:2006-06-08

    IPC分类号: H01L21/336 H01L23/62

    摘要: A field effect transistor is formed as follows. A semiconductor region of a first conductivity type with an epitaxial layer of a second conductivity extending over the semiconductor region is provided. A trench extending through the epitaxial layer and terminating in the semiconductor region is formed. A two-pass angled implant of dopants of the first conductivity type is carried out to thereby form a region of first conductivity type along the trench sidewalls. A threshold voltage adjust implant of dopants of the second conductivity type is carried out to thereby convert a conductivity type of a portion of the region of first conductivity type extending along upper sidewalls of the trench to the second conductivity type. Source regions of the first conductivity type flanking each side of the trench are formed.

    摘要翻译: 场效应晶体管如下形成。 提供了具有在半导体区域上延伸的具有第二导电性的外延层的第一导电类型的半导体区域。 形成延伸穿过外延层并终止在半导体区域中的沟槽。 执行第一导电类型的掺杂剂的双向成角度注入,从而沿着沟槽侧壁形成第一导电类型的区域。 执行阈值电压调整第二导电类型的掺杂剂的注入,从而将沿沟槽的上侧壁延伸的第一导电类型区域的一部分的导电类型转换为第二导电类型。 形成沟槽每一侧的第一导电类型的源区。

    TAPERED VOLTAGE POLYSILICON DIODE ELECTROSTATIC DISCHARGE CIRCUIT FOR POWER MOSFETS AND ICs
    5.
    发明申请
    TAPERED VOLTAGE POLYSILICON DIODE ELECTROSTATIC DISCHARGE CIRCUIT FOR POWER MOSFETS AND ICs 有权
    用于功率MOSFET和集成电路的锥形电压多晶硅二极管静电放电电路

    公开(公告)号:US20080087963A1

    公开(公告)日:2008-04-17

    申请号:US11865191

    申请日:2007-10-01

    IPC分类号: H01L27/06

    摘要: An electrostatic discharge (ESD) protection network for power MOSFETs includes parallel branches, containing polysilicon zener diodes and resistors, used for protecting the gate from rupture caused by high voltages caused by ESD. The branches may have the same or independent paths for voltage to travel across from the gate region into the semiconductor substrate. Specifically, the secondary branch has a higher breakdown voltage than the primary branch so that the voltage is shared across the two branches of the protection network. The ESD protection network of the device provides a more effective design without increasing the space used on the die. The ESD protection network can also be used with other active and passive devices such as thyristors, insulated-gate bipolar transistors, and bipolar junction transistors.

    摘要翻译: 用于功率MOSFET的静电放电(ESD)保护网络包括并联支路,其包含多晶硅齐纳二极管和电阻器,用于保护栅极免受由ESD引起的高压引起的破坏。 分支可以具有相同或独立的路径,用于电压跨越栅极区域进入半导体衬底。 具体地,次级分支具有比主分支更高的击穿电压,使得电压在保护网络的两个分支上共享。 器件的ESD保护网络提供了更有效的设计,而不增加芯片上使用的空间。 ESD保护网络还可以与其他有源和无源器件如晶闸管,绝缘栅双极晶体管和双极结型晶体管一起使用。