摘要:
An electrostatic capacitance detection circuit 10 comprises an AC voltage generator 11, an operational amplifier 14 of which non-inverting input terminal is connected to specific potential (a ground in this example), an impedance converter 16, a resistance (R1) 12 connected between the AC voltage generator 11 and an inverting input terminal of the operational amplifier 14, a resistance (R2) 13 connected between the inverting input terminal of the operational amplifier 14 and an output terminal of the impedance converter 16, and an impedance element (a capacitor) 15 connected between an output terminal of the operational amplifier 14 and an input terminal of the impedance converter 16. A capacitor to be detected 17 is connected between the input terminal of the impedance converter 16 and the specific potential.
摘要:
An electrostatic capacitance detection circuit 10 comprises an AC voltage generator 11, an operational amplifier 14 of which non-inverting input terminal is connected to specific potential (a ground in this example), an impedance converter 16, a resistance (R1) 12 connected between the AC voltage generator 11 and an inverting input terminal of the operational amplifier 14, a resistance (R2) 13 connected between the inverting input terminal of the operational amplifier 14 and an output terminal of the impedance converter 16, and an impedance element (a capacitor) 15 connected between an output terminal of the operational amplifier 14 and an input terminal of the impedance converter 16. A capacitor to be detected 17 is connected between the input terminal of the impedance converter 16 and the specific potential.
摘要:
A speaker unit has a plurality of sound sources each outputting a sound wave. The compressional, sound wave output from the speaker unit arrives, or vibrates air, which moves a movable part of a three-axis acceleration sensor, or a microstructure of a chip to be tested TP. As the movable part thus moves, a value in resistance accordingly varies, and such variation is measured as based on an output voltage provided via a probe. A control unit determines a property of the three-axis acceleration sensor from a value in property as measured or measurement data. Furthermore, the plurality of sound sources can be spaced by a pitch of a predetermined value set as based on their difference in the distance to the movable part of the three-axis acceleration sensor and the wavelength of the test wave to apply a composite test wave to the movable part such that the composite sound wave's composite sound field is maximized.
摘要:
Voltage is applied to a chip TP by a voltage drive unit 30 through a probe needle P to move a movable part of a microstructure. A sound produced in response to motion of the movable part of the microstructure is detected by a microphone 3. Then, the sound detected by the microphone 3 is measured by a measurement unit 25. The control unit 20 evaluates the characteristics of the tested chip TP by comparing with a sound detected from an ideal chip TP.
摘要:
Test sound wave is outputted from a speaker. A movable part of a three-axis acceleration sensor, which is a micro structure of a chip to be tested TP, moves due to the arrival of the test sound wave which is compression wave outputted from the speaker, that is, due to air vibrations. A change in the resistance value that changes in accordance with this movement is measured on the basis of an output voltage that is provided via a probe needles. A control part determines the property of the three-axis acceleration sensor on the basis of the measured property values, that is, measured data.
摘要:
Test sound wave is outputted from a speaker. A movable part of a three-axis acceleration sensor, which is a micro structure of a chip to be tested TP, moves due to the arrival of the test sound wave which is compression wave outputted from the speaker, that is, due to air vibrations. A change in the resistance value that changes in accordance with this movement is measured on the basis of an output voltage that is provided via a probe needles. A control part determines the property of the three-axis acceleration sensor on the basis of the measured property values, that is, measured data.
摘要:
A speaker unit has a plurality of sound sources each outputting a sound wave. The compressional, sound wave output from the speaker unit arrives, or vibrates air, which moves a movable part of a three-axis acceleration sensor, or a microstructure of a chip to be tested TP. As the movable part thus moves, a value in resistance accordingly varies, and such variation is measured as based on an output voltage provided via a probe. A control unit determines a property of the three-axis acceleration sensor from a value in property as measured or measurement data. Furthermore, the plurality of sound sources can be spaced by a pitch of a predetermined value set as based on their difference in the distance to the movable part of the three-axis acceleration sensor and the wavelength of the test wave to apply a composite test wave to the movable part such that the composite sound wave's composite sound field is maximized.
摘要:
A microstructure inspecting apparatus for evaluating a characteristic of at least one microstructure having a movable section formed on a substrate, includes: a probe, which electrically connects with pads formed on the microstructure, for obtaining an electric signal of the microstructure; a plurality of nozzles, positioned in the vicinity of the movable section of the microstructure, for discharging or sucking a gas; a nozzle flow rate controller for controlling a flow rate of the gas discharged from or sucked into the plurality of nozzles; and an evaluation unit for detecting a displacement of the movable section of the microstructure by using the electric signal obtained through the probe, wherein the displacement is made by the gas discharged from or sucked into the plurality of nozzles, and evaluating the characteristic of the microstructure based on the detected result.
摘要:
An electrostatic capacitance detection circuit 10 comprises an AC voltage generator 11, a first operational amplifier 14 of which non-inverting input terminal is connected to specific potential (a ground in this example), a second operational amplifier 16 that includes a voltage follower, a resistance (R1) 12 connected between the AC voltage generator 11 and an inverting input terminal of the first operational amplifier 14, a resistance (R2) 13 connected between the inverting input terminal of the first operational amplifier 14 and an output terminal of the second operational amplifier 16, and an impedance element (a capacitor) 15 connected between an output terminal of the first operational amplifier 14 and a non-inverting input terminal of the second operational amplifier 16, and a capacitor to be detected 17 is connected between the non-inverting input terminal of the second operational amplifier 16 and specific potential. The electrostatic capacitance detection circuit 10 and the capacitor 17 are located adjacently.
摘要:
A displacement measurement apparatus for a microstructure according to the present invention measures a displacement of the microstructure having a fixed portion electrode including a first electrode and a second electrode and a movable portion electrode located oppositely to the fixed portion electrode. A bias generating circuit applies a bias signal to between the first electrode and the movable portion electrode so that influence of a noise signal on a detection signal picked up from between the second electrode and the movable portion electrode may be reduced. A C/V converting circuit converts a capacitance change that is picked up from between the second electrode and the movable portion electrode into a voltage. A detecting circuit detects a displacement of the movable portion electrode based on the voltage.
摘要翻译:根据本发明的用于微结构的位移测量装置测量具有包括第一电极和第二电极的固定部分电极和位于与固定部分电极相对的可动部电极的微结构的位移。 偏置产生电路将偏置信号施加到第一电极和可动部分电极之间,从而可以减少噪声信号对从第二电极和可动部分电极之间拾取的检测信号的影响。 C / V转换电路将从第二电极和可动部分电极之间拾取的电容变化转换为电压。 检测电路基于电压检测可动部分电极的位移。