Carbon-film Resistors
A carbon-film resistor is a resistor in which a thin film of carbon is deposited onto an insulated substrate and then cut into a spiral body.
The resistance value of the resistor is controlled by varying the proportion of carbon to insulator. More carbon gives less resistance, while more insulating material gives greater resistance.
Compared to carbon-composition resistors, carbon-film resistors have teh following advantages: lower and tighter tolerances, less sensitivity to temperature changes and aging, and less noise generated internally.
Between the three types of resistors based on composition, which are carbon-composition resistors,
carbon-film resistors, and metal-film resistors, in overall performance, metal-film resistors are the best, carbon-film
the next best, and carbon-composition resistors last.
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