Edge Termination for Semiconductor Devices
    4.
    发明申请
    Edge Termination for Semiconductor Devices 有权
    半导体器件的边沿终端

    公开(公告)号:US20090294892A1

    公开(公告)日:2009-12-03

    申请号:US12418808

    申请日:2009-04-06

    IPC分类号: H01L29/06 H01L29/861

    摘要: A high-voltage termination structure includes a peripheral voltage-spreading network. One or more trench structures are connected at least partly in series between first and second power supply voltages. The trench structures include first and second current-limiting structures connected in series with a semiconductor material, and also includes permanent charge in a trench-wall dielectric. The current-limiting structures in the trench structures are jointly connected in a series-parallel ladder configuration. The current-limiting structures, in combination with the semiconductor material, provide a voltage distribution between the core portion and the edge portion.

    摘要翻译: 高压端接结构包括外围电压分布网络。 一个或多个沟槽结构至少部分地串联连接在第一和第二电源电压之间。 沟槽结构包括与半导体材料串联连接的第一和第二限流结构,并且还包括在沟槽壁电介质中的永久电荷。 沟槽结构中的电流限制结构以串联 - 并联梯形结构共同连接。 与半导体材料组合的限流结构在芯部分和边缘部分之间提供电压分布。

    POWER DEVICE STRUCTURES AND METHODS
    10.
    发明申请
    POWER DEVICE STRUCTURES AND METHODS 有权
    电力设备结构与方法

    公开(公告)号:US20100219468A1

    公开(公告)日:2010-09-02

    申请号:US12626523

    申请日:2009-11-25

    IPC分类号: H01L29/78

    摘要: Vertical power devices which include an insulated trench containing insulating material and a gate electrode, and related methods. A body region is positioned so that a voltage bias on the gate electrode will cause an inversion layer in the body region. A layer of permanent charge, at or near the sidewall of the trench, provides charge balancing for the space charge in the depleted semiconductor material during the OFF state. A conductive shield layer is positioned below the gate electrode in the insulating material, and reduces capacitive coupling between the gate and the lower part of the trench. This reduces switching losses. In other embodiments, a planar gate electrode controls horizontal carrier injection into the vertical conduction pathway along the trench, while a shield plate lies over the trench itself to reduce capacitive coupling.

    摘要翻译: 垂直功率器件,包括绝缘沟槽,包含绝缘材料和栅电极,以及相关方法。 定位体区域,使得栅电极上的电压偏置将在体区域中引起反转层。 在沟槽的侧壁处或其附近的永久电荷层在关闭状态期间为耗尽的半导体材料中的空间电荷提供电荷平衡。 导电屏蔽层位于绝缘材料中的栅电极下方,并且减小栅极与沟槽下部之间的电容耦合。 这样可以减少开关损耗。 在其他实施例中,平面栅极电极控制沿着沟槽的垂直传导路径的水平载流子注入,而屏蔽板位于沟槽本身上以减小电容耦合。