Ultra-High Voltage Laterally-Diffused MOS Devices and Methods of Forming the Same
    3.
    发明申请
    Ultra-High Voltage Laterally-Diffused MOS Devices and Methods of Forming the Same 有权
    超高压侧向弥散MOS器件及其形成方法

    公开(公告)号:US20150041891A1

    公开(公告)日:2015-02-12

    申请号:US13963658

    申请日:2013-08-09

    IPC分类号: H01L29/78 H01L29/10 H01L29/66

    摘要: Embodiments for the present disclosure include a semiconductor device, an ultra-high voltage (UHV) laterally-diffused metal-oxide-semiconductor (LDMOS) transistor, and methods of forming the same. An embodiment includes a first well region of a first conductivity type in a top surface of a substrate, and a second well region of a second conductivity type in the top surface of the substrate. The second well region laterally separated from the first well region by a portion of the substrate. The embodiment further includes a third region of the second conductivity type in the first well region, and a first field oxide region in the first well region, a second field oxide region in the second well region, the second field oxide region having a second bottom surface, and the first field oxide region having a first bottom surface lower than the second bottom surface and on and directly contacting the third region.

    摘要翻译: 本公开的实施例包括半导体器件,超高电压(UHV)横向扩散金属氧化物半导体(LDMOS)晶体管及其形成方法。 一个实施例包括在衬底的顶表面中的第一导电类型的第一阱区域和在衬底的顶表面中的第二导电类型的第二阱区域。 第二阱区域由衬底的一部分与第一阱区域横向分离。 该实施例还包括第一阱区中的第二导电类型的第三区域和第一阱区域中的第一场氧化物区域,第二阱区域中的第二场氧化物区域,第二场氧化物区域具有第二底部区域 表面,并且第一场氧化物区域具有比第二底表面低的第一底表面,并且直接接触第三区域。

    Passivation scheme for pad openings and trenches

    公开(公告)号:US11444046B2

    公开(公告)日:2022-09-13

    申请号:US17004467

    申请日:2020-08-27

    摘要: An integrated circuit (IC) comprising an enhanced passivation scheme for pad openings and trenches is provided. In some embodiments, an interlayer dielectric (ILD) layer covers a substrate and at least partially defines a trench. The trench extends through the ILD layer from a top of the ILD layer to the substrate. A conductive pad overlies the ILD layer. A first passivation layer overlies the ILD layer and the conductive pad, and further defines a pad opening overlying the conductive pad. A second passivation layer overlies the ILD layer, the conductive pad, and the first passivation layer, and further lines sidewalls of the first passivation layer in the pad opening and sidewalls of the ILD layer in the trench. Further, the second passivation layer has a low permeability for moisture or vapor relative to the ILD layer.