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Piezoresistive effect is defined as the change in resistance of a material due to an applied stress and this term is used commonly in connection with semi conducting materials. The resistivity of a semiconductor is inversely proportional to the product of the electronic charge, the number of charge carriers, and their average mobility. The piexoresistive effect of applied stress is to change both the number and average mobility of the charge carriers. By choosing the correct crystallographic orientation and dopant type, both positive and negative gauge factors may be obtained. Silicon is now almost universally used for the manufacture of semiconductor strain gauges. Products & Services
Strain gauges are measuring elements that convert force, pressure, tension, etc., into an electrical signal.
Junction field-effect transistors (JFET) consist of a semiconductor channel in which the width and the conductivity of the channel is controlled by the space-charge region associated with the p-n region.
Extensometers are used to indicate the deformation of material while it is subjected to stress.
Transistors are electronic devices made of semiconductor material that amplify a signal or open or close a circuit.
Wafer and thin film instrumentation includes quartz crystal microbalance (QCM) monitors, ellipsometers, RHEED systems, imaging stations, CD-SEMs, ion mills, and C-V systems specifically designed for wafer metrology or in-situ monitoring of thin film parameters during thin film or semiconductors wafer processing.
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High electron mobility transistors (HEMTs) are used in microwave circuit applications. These transistors behave much like conventional field effect transistors (FETs): a conducting channel between...
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In This Chapter
Electrical Current and Ohm’s Law
Kirchhoff ’s Laws
Resistances in Parallel and Series
Capacitances in Parallel and Series
Impedances in AC Circuits
Transient Currents in...
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In electronics, a diode is a component that restricts the direction of movement of charge carriers. Essentially, it allows an electric current to flow in one direction, but blocks it in the opposite...
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The most universal measuring device for the electrical measurement of mechanical quantities is the strain gage. Several types of strain gages depend on the proportional variance of electrical...
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Piezo sensors are used to reliably measure pressure, acceleration, tension or force. They are based on the piezoelectric effect which is due to the ability of crystals to generate an electric charge...
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