High electron mobility transistor

    公开(公告)号:US10424659B1

    公开(公告)日:2019-09-24

    申请号:US15973888

    申请日:2018-05-08

    Abstract: A high electron mobility transistor includes a buffer layer, a threshold voltage adjustment layer, a band adjustment layer, a first enhancement layer, a gate electrode, and source/drain electrodes. The threshold voltage adjustment layer is disposed on the buffer layer. A channel region is disposed in the buffer layer adjacent to an interface between the buffer layer and the threshold voltage adjustment layer. The band adjustment layer is disposed on the threshold voltage adjustment layer. The first enhancement layer is conformally covering the threshold voltage adjustment layer and the band adjustment layer. The gate electrode is disposed on the first enhancement layer. The source/drain electrodes are disposed on the buffer layer through the threshold voltage adjustment layer and the first enhancement layer on opposite sides of the gate electrode respectively. The threshold voltage adjustment layer and the first enhancement layer are III-V semiconductors.

    Boost devices with active diodes and switch-mode converters thereof

    公开(公告)号:US10033260B2

    公开(公告)日:2018-07-24

    申请号:US14957163

    申请日:2015-12-02

    Abstract: A switch-mode converter includes a high-side driver, a high-side transistor, a low-side driver, a low-side transistor, a capacitor, and an active diode. The high-side driver is supplied by the bootstrap voltage of the bootstrap node and a floating reference voltage of a floating reference node, and generates the high-side output signal. The high-side transistor provides an input voltage to the floating reference node according to the high-side output signal. The low-side driver generates the low-side output signal. The low-side transistor couples the floating reference node to a ground according to the low-side output signal. The capacitor is coupled between the bootstrap node and the floating reference node. The active diode provides the supply voltage to the bootstrap node. When the bootstrap voltage exceeds the supply voltage, the active diode isolates the supply voltage from the bootstrap node.

    Semiconductor devices and methods for manufacturing the same

    公开(公告)号:US10032938B1

    公开(公告)日:2018-07-24

    申请号:US15723802

    申请日:2017-10-03

    Abstract: A semiconductor device includes a first gallium nitride layer disposed on a semiconductor substrate, wherein the first gallium nitride layer has a first conductivity type. The semiconductor device also includes a second gallium nitride layer disposed on the first gallium nitride layer, wherein the second gallium nitride layer has the first conductivity type, and the first gallium nitride layer has a dopant concentration which is greater than that of the second gallium nitride layer. The semiconductor device further includes an anode electrode disposed on the second gallium nitride layer, a cathode electrode disposed on and in direct contact with the first gallium nitride layer, and an insulating region disposed on and in direct contact with the first gallium nitride layer, wherein the insulating region is located between the cathode electrode and the second gallium nitride layer.

    Ultra-high voltage devices and method for fabricating the same

    公开(公告)号:US09842896B1

    公开(公告)日:2017-12-12

    申请号:US15436158

    申请日:2017-02-17

    CPC classification number: H01L29/0634 H01L21/26513 H01L29/408

    Abstract: An ultra-high voltage device is provided. The ultra-high voltage device includes a substrate, a first well zone formed in the substrate, a second well zone formed in the substrate adjacent to the first well zone, a gate oxide layer formed on the first well zone and the second well zone, a gate formed on the gate oxide layer, an insulation region formed on the surface of the second well zone, a first implant region formed in the second well zone underneath the insulation region, a second implant region formed below the first implant region, and a junction formed between the first implant region and the second implant region. At least one of the first implant region and the second implant region includes at least two sub-implant regions having different implant concentrations. The sub-implant region having the higher implant concentration is adjacent to the junction.

    High-side circuits with modified diode and layout placement thereof
    8.
    发明授权
    High-side circuits with modified diode and layout placement thereof 有权
    具有改性二极管的高边电路及其布局布局

    公开(公告)号:US09577506B1

    公开(公告)日:2017-02-21

    申请号:US14981226

    申请日:2015-12-28

    Abstract: A high-side circuit, adapted for a switched-mode converter, includes a level shifter, a high-side driver, a high-side transistor, a capacitor, and an active diode. The level shifter receives a first signal to generate a set signal. The high-side driver is supplied by a bootstrap voltage of a bootstrap node and a floating reference voltage of a floating reference node, which controls the high-side transistor to provide an input voltage to the floating reference node according to the set signal. The capacitor is coupled between the bootstrap node and the floating reference node. The active diode provides a supply voltage to the bootstrap node. When the bootstrap voltage exceeds the supply voltage, the active diode isolates the supply voltage from the bootstrap node according to a control voltage. The active diode includes a first-type well coupled to the bootstrap node, where the high-side driver is disposed.

    Abstract translation: 适用于开关模式转换器的高边电路包括电平移位器,高侧驱动器,高侧晶体管,电容器和有源二极管。 电平移位器接收第一信号以产生设置信号。 高侧驱动器由自举节点的自举电压和浮动参考节点的浮动参考电压提供,其控制高侧晶体管,以根据设置的信号向浮动参考节点提供输入电压。 电容器耦合在引导节点和浮动参考节点之间。 有源二极管为引导节点提供电源电压。 当自举电压超过电源电压时,有源二极管根据控制电压隔离引导节点的电源电压。 有源二极管包括耦合到自举节点的第一类阱,其中设置了高侧驱动器。

    Semiconductor device and fabricating method thereof
    9.
    发明授权
    Semiconductor device and fabricating method thereof 有权
    半导体器件及其制造方法

    公开(公告)号:US08723256B1

    公开(公告)日:2014-05-13

    申请号:US13670951

    申请日:2012-11-07

    Abstract: A semiconductor device is provided. The device includes a semiconductor substrate and a gate structure thereon. A well region is formed in the semiconductor substrate. A drain region and a source region are respectively formed in the semiconductor substrate inside and outside of the well region. At least one set of the first and second heavily doped regions is formed in the well region between the drain region and the source region, wherein the first and second heavily doped regions are stacked vertically from bottom to top and have a doping concentration which is larger than that of the well region. The semiconductor substrate and the first heavily doped region have a first conductivity type and the well region and the second heavily doped region have a second conductivity type. A method for fabricating a semiconductor device is also disclosed.

    Abstract translation: 提供半导体器件。 该器件包括半导体衬底及其上的栅极结构。 在半导体衬底中形成阱区。 漏极区域和源极区域分别形成在阱区域内部和外部的半导体衬底中。 在漏极区域和源极区域之间的阱区域中形成至少一组第一和第二重掺杂区域,其中第一和第二重掺杂区域从底部到顶部垂直堆叠并且具有较大的掺杂浓度 而不是井区。 半导体衬底和第一重掺杂区域具有第一导电类型,阱区和第二重掺杂区具有第二导电类型。 还公开了一种制造半导体器件的方法。

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