Semiconductor strain gauge
    1.
    发明授权
    Semiconductor strain gauge 失效
    半导体应变计

    公开(公告)号:US4404539A

    公开(公告)日:1983-09-13

    申请号:US236934

    申请日:1981-02-23

    CPC分类号: G01L9/0054 G01L9/065

    摘要: A semiconductor strain gauge is arranged as a bridge having four piezoresistive elements which each include a low impurity concentration diffused portion and a heavily-doped diffused portion. The resistance values of the two low impurity concentration diffused portions opposite each other in the bridge are greater than the resistance values of the other two lower impurity concentration portions. The resistances of the heavily-doped diffused portion are selected so that the resistance of the piezoresistive elements are equal. However, by virtue of the fact that the resistance temperature coefficient of the low impurity portions are greater than the resistance temperature coefficients of the high impurity portions, the overall resistance temperature coefficients of the bridge arms will be different. This permits the zero-point voltage of the bridge to always increase with an increase in temperature.

    摘要翻译: 半导体应变仪布置为具有四个压阻元件的桥,每个压阻元件包括低杂质浓度扩散部分和重掺杂扩散部分。 在桥中彼此相对的两个低杂质浓度扩散部分的电阻值大于其它两个较低杂质浓度部分的电阻值。 选择重掺杂扩散部分的电阻,使得压阻元件的电阻相等。 然而,由于低杂质部分的电阻温度系数大于高杂质部分的电阻温度系数,所以桥臂的整体电阻温度系数将不同。 这允许桥接器的零点电压总是随着温度的升高而增加。

    Semiconductor absolute pressure transducer assembly and method
    2.
    发明授权
    Semiconductor absolute pressure transducer assembly and method 失效
    半导体绝对压力传感器组件及方法

    公开(公告)号:US4291293A

    公开(公告)日:1981-09-22

    申请号:US76813

    申请日:1979-09-19

    CPC分类号: G01L9/0042 G01L9/0054

    摘要: A semiconductor pressure transducer assembly comprising a silicon diaphragm assembly and a glass covering member. The silicon diaphragm assembly has a circular diaphragm portion of thin silicon which is formed using etching, and a thick supporting portion therearound. Piezoresistive elements of a piezoresistive bridge circuit and conducting paths for electrically connection thereof are formed on the silicon diaphragm assembly. On a surface of the silicon diaphragm assembly, a passivating layer of silicon dioxide are formed in uniform thickness, and further on a surface of the passivating layer is formed a layer of polysilicon on the supporting portion of the silicon diaphragm assembly. In the passivating layer, a contacting window is formed, through which the polysilicon layer is electrically connected to the silicon diaphragm assembly. The covering member of borosilicate glass having a circular well is mounted and bonded onto the silicon diaphragm assembly in contact with the polysilicon layer using Anodic Bonding method. And the processed silicon diaphragm assembly has a flat surface thereof, on which the piezoresistive elements and the conducting paths are constructed using Ion Implantation method, or reforming a silicon dioxide layer thereon after removing another silicon dioxide layer used as mask in diffusing process.

    摘要翻译: 一种半导体压力传感器组件,包括硅膜组件和玻璃覆盖件。 硅膜组件具有通过蚀刻形成的薄硅的圆形隔膜部分和其周围的厚的支撑部分。 在硅膜组件上形成压阻电桥电路的压阻元件和用于电连接的导电路径。 在硅膜组件的表面上形成均匀厚度的二氧化硅钝化层,并且在钝化层的表面上进一步在硅膜组件的支撑部分上形成多晶硅层。 在钝化层中,形成接触窗,多晶硅层通过该接触窗电连接到硅膜组件。 使用阳极接合方法将具有圆形孔的硼硅酸盐玻璃的覆盖部件安装并接合到与硅多晶硅层接触的硅膜组件上。 并且经处理的硅膜组件具有平坦的表面,在其上使用离子注入方法构建压阻元件和导电路径,或者在去除扩散过程中用作掩模的另一二氧化硅层之后重新形成二氧化硅层。

    Pressure sensor employing semiconductor strain gauge
    3.
    发明授权
    Pressure sensor employing semiconductor strain gauge 失效
    采用半导体应变片的压力传感器

    公开(公告)号:US4480478A

    公开(公告)日:1984-11-06

    申请号:US466027

    申请日:1983-02-14

    CPC分类号: G01L9/065

    摘要: Four semiconductor strain gauges constitute a bridge circuit. This bridge circuit and a sensitivity temperature compensation circuit are connected in series, and a constant voltage is applied to the series circuit. The sensitivity temperature compensation circuit varies a voltage across the bridge circuit, depending upon temperatures. The constant voltage is divided to produce a predetermined voltage. The predetermined voltage is selected to be equal to the voltage of one output side node of the bridge circuit at the time when the semiconductor strain gauges are unstrained and at a predetermined temperature. The point of this voltage and the output side node are connected through a resistor so as to perform zero-point temperature compensation.

    摘要翻译: 四个半导体应变计构成桥接电路。 该桥式电路和灵敏度温度补偿电路串联连接,并向串联电路施加恒定电压。 灵敏度温度补偿电路根据温度改变桥接电路两端的电压。 将恒定电压分压以产生预定电压。 选择预定电压等于当半导体应变计未受限制并处于预定温度时桥接电路的一个输出侧节点的电压。 该电压和输出侧节点通过电阻连接,以进行零点温度补偿。

    Semiconductor strain gauge with temperature compensator
    4.
    发明授权
    Semiconductor strain gauge with temperature compensator 失效
    带温度补偿器的半导体应变片

    公开(公告)号:US4173148A

    公开(公告)日:1979-11-06

    申请号:US948778

    申请日:1978-10-05

    摘要: A bridge circuit with four arms including semiconductor strain gauge elements has input terminals for coupling a DC power supply with a pair of diagonally opposite junctions of the bridge circuit per se and output terminals coupled with a pair of remaining diagonally opposite junctions. Initial zero-point temperature compensators each are connected in series and in parallel to each of semiconductor strain gauge elements on adjacent two arms of the bridge circuit. Temperature compensators for zero-point shift adjustment are each provided between the adjacent arms closer to each output terminal. A temperature compensator for span adjustment is provided between one of the input terminals and the DC power source. A constant current control unit for feeding a constant current to the bridge circuit is provided between the other input terminal and the DC power supply.

    摘要翻译: 具有包括半导体应变计元件的四个臂的桥接电路具有用于将直流电源与桥接电路本身的一对斜对置接头连接的输入端子以及与一对剩余的对角线相对的接合部连接的输出端子。 初始零点温度补偿器各自与桥式电路的相邻两个臂上的每个半导体应变计元件串联并联。 用于零点移位调整的温度补偿器分别设置在靠近每个输出端子的相邻臂之间。 在一个输入端子和直流电源之间提供用于量程调节的温度补偿器。 在另一个输入端子和直流电源之间设置用于向桥式电路馈送恒定电流的恒定电流控制单元。

    Capacitive pressure sensor
    9.
    发明授权
    Capacitive pressure sensor 失效
    电容式压力传感器

    公开(公告)号:US4495820A

    公开(公告)日:1985-01-29

    申请号:US426084

    申请日:1982-09-28

    CPC分类号: H01L27/20 G01L9/0073 H01G5/16

    摘要: A capacitive pressure sensor and its manufacturing method are disclosed. An amplifier is formed on the main surface of a first semiconductor substrate by a diffusion process, and its surface is covered with an insulating film. An electrode is vapor-deposited on the surface of the amplifier and electrically connected to the amplifier through a through hole formed in the insulating film. For forming a diaphragm, the surface of a second semiconductor substrate disposed facing the electrode to form a capacitor, which is opposite to the surface of the second semiconductor substrate facing the electrode, is partially etched away to form a depression. The first and second semiconductor substrates are anodically bonded to each other using a glass layer.

    摘要翻译: 公开了一种电容式压力传感器及其制造方法。 通过扩散处理在第一半导体衬底的主表面上形成放大器,并且其表面被绝缘膜覆盖。 电极沉积在放大器的表面上,并通过形成在绝缘膜上的通孔与放大器电连接。 为了形成光阑,第二半导体衬底的与电极相对配置以形成与面向电极的第二半导体衬底的表面相反的电容器的表面被部分蚀刻掉以形成凹陷。 使用玻璃层将第一和第二半导体衬底彼此阳极接合。