摘要:
A microstructure includes a mass; a base member in which the mass is movably contained. The mass includes a surface, which is exposed out of the base member, and a stopper wire, which is arranged above the surface of the mass so as to inhibit over move of the mass.
摘要:
An apparatus for detecting an impedance variable in response to a sensed physical amount of a sensor is provided which comprises an impedance-frequency conversion unit and a counter. The impedance-frequency conversion unit converts the sensor impedance to an oscillation signal a frequency of which corresponds to the sensor impedance. The impedance-frequency conversion unit comprises an impedance-voltage converter for providing a voltage corresponding to the sensor impedance, and a Wien bridge oscillator including an element an impedance of which varies in response to the voltage from the impedance-voltage converter, for generating the oscillation signal. The Wien bridge oscillator is capable of generating a square wave signal as the oscillation signal. The counter counts the number of waves (or wave number) of the oscillation signal in a predetermined time period to output a count value which can be handled as a digital signal.
摘要:
A detection circuit which is capable of outputting a voltage proportional to a static capacitance of a sensor is provided, which comprises a voltage input terminal connected to receive an input voltage and an operational amplifier. The input voltage received at the voltage input terminal is changed between two different reference voltages. An inverting input terminal of the amplifier is connected to the voltage input terminal through a resistor, and a non-inverting input terminal of the amplifier is connected to the voltage input terminal through the sensor capacitance and to one of the reference voltages through a switch. An output voltage of the amplifier is connected to the inverting input terminal through a feedback circuit including a resistor and a switch. The switches are closed and the one of the reference voltages is supplied to the input terminal during an initialization cycle. The switches are opened and the other reference voltage is supplied to the input terminal during a measurement cycle. The operational amplifier outputs an output voltage which linearly varies in response to the sensor capacitance.
摘要:
The method includes forming a hole penetrating from one surface of a substrate to an electrode formed on the other surface of the substrate; forming an organic insulating film in the hole; removing at least a part of the organic insulating film formed in a bottom portion of the hole and not the organic insulating film formed on a side wall portion of the hole, to expose the electrode; cleaning an exposed surface of the electrode by using plasma of an inert gas; filling a conductive metal in the hole; removing at least a part of a surface of the organic insulating film by the reaction of oxygen plasma; and annealing the substrate in a dysoxidative atmosphere.
摘要:
A method for manufacturing a probe needle having beams and a contactor placed on tips of the beams comprises preparing a Si wafer 20, forming a seed layer 21 on the Si wafer 20, and forming grooves in a desired shape of the beams on the seed layer 21 by patterning a photoresist 23. Subsequently, the grooves are filled up with metal-plated layers 24a, 24b to form the desired shape of beams.
摘要:
An aqueous solution containing an adhesion promoter in an amount of 20 vol. % or more is heated and vaporized to a temperature of 80 to 100° C. to produce a water-containing adhesion promoter vapor, and the water-containing adhesion promoter vapor is adhered to and condensed on a surface of a substrate, to cause a heating and dehydrating reaction by which the adhesion promoter is adhered to the surface of the substrate.
摘要:
A first wiring layer 16 is disposed on an insulating film 14 on the lower surface of an upper substrate 15, while a second wiring layer 13 three-dimensionally crossing the first wiring layer 16 is provided on the insulating film 12 on a lower substrate 11. A cantilever 17 has one end connected to the first wiring layer 16 and the other end opposed to the second wiring layer 13 with a space therebetween. A thermoplastic sheet 19 is arranged on the upper substrate 15 so as to cover the through-hole 18. The thermoplastic sheet 19 is pressed by a heated pin 20 against the cantilever 17 and deformed so as to maintain the connection between the cantilever 17 and the second wiring layer 13, and therefore close the switch 10.
摘要:
In an acceleration sensor detecting inclined displacement of a predetermined article from a basic position, the acceleration sensor (10) includes a sensor chip having a detection plane including one detection axis or two crossing detection axes detecting the inclined displacement. An axis orthogonal to the detection plane of the sensor chip is disposed in parallel with a standard plane of the article in the basic position. Then, the sensor chip obtains an output signal according to the inclined displacement of the standard plane.
摘要:
A impedance-to-voltage converter for converting an impedance of a target to a voltage is described which comprises an operational amplifier (OP), a coaxial cable consisting a signal line and shielding element(s), and an AC signal generator. A feedback impedance circuit is connected between output and inverting terminals of the OP, and whereby a non-inverting terminal and the inverting terminal are an imaginal-short condition. One end of the signal line is connected to the inverting input terminal of the OP and the other end is connected to one electrode of the target and the AC signal generator is connected to the non-inverting input terminal of the OP. The shielding element comprises at least one shielding layer surrounding the signal line and is connected to the non-inverting input terminal of the OP, and thus the signal line and the shielding layer are the same voltage due to the imaginal-short of the input terminals of the OP, resulting in reduction of noise on the signal line.
摘要:
An impedance-to-voltage converter utilizes an operational amplifier to convert an impedance into a voltage without suffering from the influence of stray capacitances. The impedance-to-voltage converter is formed of an operational amplifier which has an imaginary short-circuit state between an inverting input and a non-inverting input thereof when an impedance element is connected between an output and the inverting input, a shielding line for shielding a line for connecting the impedance element to the inverting input, an AC signal generator connected to the non-inverting input, and a shielding line for shielding the signal line. The shielding lines are connected to the non-inverting input.