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SMD thin-film resistors

SMD thin-film resistors

Thin-layer resistors consist largely of a carrier material such as silicon or aluminium. On this a wafer-thin resistance layer of tantalum nitride is deposited, by the process of evaporation and sputtering. This allows generation of layer thicknesses of one micrometre and less. The advantage of the production process is the tight tolerance of the resistance value. This means that the resistor operates very precisely, deviates scarcely at all from the manufacturer’s specification and thus allows currents to be held to precise limits. Above all analogue circuits such as those for audio amplifiers which demand just those qualities of high precision and high stability in order to avoid any sort of distortion of the signal.

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