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    • 4. 发明申请
    • HIGHLY SENSITIVE CAPACITIVE SENSOR AND METHODS OF MANUFACTURING THE SAME
    • 高敏感电容传感器及其制造方法
    • US20120048019A1
    • 2012-03-01
    • US12869222
    • 2010-08-26
    • Hanqin ZhouLeyue JiangMathew VargheseHaidong Liu
    • Hanqin ZhouLeyue JiangMathew VargheseHaidong Liu
    • G01P15/125C23F1/00
    • G01P15/125G01P2015/0814
    • Micro-machined capacitive sensors implemented in micro-electro-mechanical system (MEMS) processes that have higher sensitivity, while providing an increased linear capacitive sensing range. Capacitive sensing is achieved via variable-area sensing, which employs a transduction mechanism in which the relationship between changes in the capacitance of variable, parallel-plate capacitors and displacements of a proof mass is generally linear. Each respective variable, parallel-plate capacitor is formed by a finger/electrode pair, in which both the finger and the electrode have rectangular tooth profiles that include a plurality of rectangular teeth. Because changes in the overlapping area of the finger and the electrode are multiplied by the number of rectangular teeth, while the standing capacity of the micro-machined capacitive sensor remains relatively high, the sensitivity of the micro-machined capacitive sensor employing variable-area sensing is significantly increased per unit area of the finger and the electrode.
    • 在微机电系统(MEMS)工艺中实现的微加工电容传感器具有更高的灵敏度,同时提供增加的线性电容感测范围。 通过可变区域感测实现电容感测,其采用转换机制,其中可变平行板电容器的电容变化与校准质量的位移之间的关系通常是线性的。 每个可变平行板电容器由手指/电极对形成,其中手指和电极均具有包括多个矩形齿的矩形齿廓。 由于手指和电极的重叠区域的变化乘以矩形齿的数量,而微加工的电容式传感器的静态容量保持相对较高,所以采用可变面积感测的微加工电容传感器的灵敏度 手指和电极的每单位面积显着增加。