VDMOS transistor protected against over-voltages between source and gate
    1.
    发明授权
    VDMOS transistor protected against over-voltages between source and gate 有权
    VDMOS晶体管保护源极和栅极之间的过电压

    公开(公告)号:US06194761B1

    公开(公告)日:2001-02-27

    申请号:US09232336

    申请日:1999-01-15

    IPC分类号: H01L2976

    摘要: The n-channel VDMOS transistor is formed in an n-type active region of an integrated circuit with junction isolation. To prevent over-voltages between source and gate which could damage or destroy the gate dielectric, a p-channel MOS transistor is formed in the same active region and has its gate electrode connected to the gate electrode of the VDMOS transistor, its source region in common with the source region of the VDMOS transistor, and its drain region connected to the p-type junction-isolation region. The p-channel MOS transistor has a threshold voltage below the breakdown voltage of the gate dielectric of the VDMOS transistor so that it acts as a voltage limiter.

    摘要翻译: n沟道VDMOS晶体管形成在具有结隔离的集成电路的n型有源区中。 为了防止可能损坏或破坏栅极电介质的源极和栅极之间的过电压,p沟道MOS晶体管形成在相同的有源区中,并且其栅电极连接到VDMOS晶体管的栅极电极,其源极区域 与VDMOS晶体管的源极区共用,并且其漏极区域连接到p型结隔离区域。 p沟道MOS晶体管具有低于VDMOS晶体管的栅极电介质的击穿电压的阈值电压,使其作为电压限制器。

    Device for limiting the working voltage for mechanical switches in
telephony
    3.
    发明授权
    Device for limiting the working voltage for mechanical switches in telephony 失效
    用于限制电话机械开关工作电压的装置

    公开(公告)号:US5602914A

    公开(公告)日:1997-02-11

    申请号:US509773

    申请日:1995-08-01

    CPC分类号: H04M1/74 H04M1/312 H04M1/82

    摘要: Device for limiting the working voltage for mechanical switches in telephony includes terminals for connection to a telephone line, a connection and power supply branch for a control circuit extending from a first terminal, the branch having a first switch, the cathode terminal of a first Zener diode and the source terminal of a first MOSFET transistor being connected to the output terminal of the first switch, the gate terminal of the first MOSFET transistor being connected, through the anode terminal of the Zener diode, to the first terminal. The current absorbed by the device may be adjusted.

    摘要翻译: 用于限制电话机械开关的工作电压的装置包括用于连接到电话线的端子,用于从第一端子延伸的控制电路的连接和电源分支,该分支具有第一开关,第一齐纳二极管的阴极端子 二极管和第一MOSFET晶体管的源极端子连接到第一开关的输出端子,第一MOSFET晶体管的栅极端子通过齐纳二极管的阳极端子连接到第一端子。 可以调节由装置吸收的电流。

    VDMOS transistor protected against over-voltages between source and gate
    5.
    发明授权
    VDMOS transistor protected against over-voltages between source and gate 有权
    VDMOS晶体管保护源极和栅极之间的过电压

    公开(公告)号:US06362036B1

    公开(公告)日:2002-03-26

    申请号:US09756886

    申请日:2001-01-09

    IPC分类号: H01L218238

    摘要: The n-channel VDMOS transistor is formed in an n-type active region of an integrated circuit with junction isolation. To prevent over-voltages between source and gate which could damage or destroy the gate dielectric, a p-channel MOS transistor is formed in the same active region and has its gate electrode connected to the gate electrode of the VDMOS transistor, its source region in common with the source region of the VDMOS transistor, and its drain region connected to the p-type junction-isolation region. The p-channel MOS transistor has a threshold voltage below the breakdown voltage of the gate dielectric of the VDMOS transistor so that it acts as a voltage limiter.

    摘要翻译: n沟道VDMOS晶体管形成在具有结隔离的集成电路的n型有源区中。 为了防止可能损坏或破坏栅极电介质的源极和栅极之间的过电压,p沟道MOS晶体管形成在相同的有源区中,并且其栅电极连接到VDMOS晶体管的栅极电极,其源极区域 与VDMOS晶体管的源极区共用,并且其漏极区域连接到p型结隔离区域。 p沟道MOS晶体管具有低于VDMOS晶体管的栅极电介质的击穿电压的阈值电压,使其作为电压限制器。

    Self-aligned process for fabricating small DMOS cells
    6.
    发明授权
    Self-aligned process for fabricating small DMOS cells 失效
    用于制造小型DMOS细胞的自对准方法

    公开(公告)号:US4774198A

    公开(公告)日:1988-09-27

    申请号:US19785

    申请日:1987-02-26

    摘要: An improved fabrication process for vertical DMOS cells contemplates the prior definition of the gate areas by placing a polycrystalline silicon gate electrode and utilizing the gate electrode itself as a mask for implanting and diffusing the body regions, while forming the short region is carried out using self-alignment techniques which permit an easy control of the lateral extention of the region itself. A noncritical mask defines the zone where the short circuiting contact between the source electrode and the source and body regions in the middle of the DMOS cell will be made, also allowing the forming the source region. Opening of the relative contact is also effected by a self alignment technique, further simplifying the process.

    摘要翻译: 用于垂直DMOS单元的改进的制造工艺考虑了通过放置多晶硅栅电极并利用栅电极本身作为用于植入和扩散体区的掩模的先前定义的栅极区域,同时使用自身进行形成短区域 对准技术,其允许容易地控制区域本身的横向延伸。 非临界掩模定义了在源极电极和DMOS电池中间的源极和体区之间的短路接触将被制成的区域,也允许形成源极区域。 相对接触的打开也通过自对准技术进行,进一步简化了过程。

    Device for limiting the working voltage mechanical switches in telephony
    8.
    发明授权
    Device for limiting the working voltage mechanical switches in telephony 失效
    用于限制电话中工作电压机械开关的装置

    公开(公告)号:US5448636A

    公开(公告)日:1995-09-05

    申请号:US017789

    申请日:1993-02-16

    CPC分类号: H04M1/74 H04M1/312 H04M1/82

    摘要: Device for limiting the working voltage for mechanical switches in telephony includes terminals for connection to a telephone line, a connection and power supply branch for a control circuit extending from a first terminal, the branch having a first switch, the cathode terminal of a first Zener diode and the source terminal of a first MOSFET transistor being connected to the output terminal of the first switch, the gate terminal of the first MOSFET transistor being connected, through the anode terminal of the Zener diode, to the first terminal. The current absorbed by the device may be adjusted.

    摘要翻译: 用于限制电话机械开关的工作电压的装置包括用于连接到电话线的端子,用于从第一端子延伸的控制电路的连接和电源分支,该分支具有第一开关,第一齐纳二极管的阴极端子 二极管和第一MOSFET晶体管的源极端子连接到第一开关的输出端子,第一MOSFET晶体管的栅极端子通过齐纳二极管的阳极端子连接到第一端子。 可以调节由装置吸收的电流。