What is the construction of metal film resistor?

Metal film fixed resistors are one of the types of fixed resistor. They are commonly used in electronic circuits, and their resistance does not change with time or temperature.

What is the construction of Metal Film Resistor?

When you think of electrical circuits, the first thing that comes to your mind is the various components used in it. One of the most important components is the resistor. It is a passive electronic component that purposefully introduces resistance to electrical currents. Resistor comes in different types, and one of them is the metal film resistor. In this article, we will explore what metal film resistor is, and how they are constructed.

Metal Film Fixed Resistors

Metal film fixed resistors are one of the types of fixed resistor. They are commonly used in electronic circuits, and their resistance does not change with time or temperature. Metal film fixed resistors have a higher precision than carbon composition resistors. Moreover, metal film resistors have a smaller tolerance and better stability than carbon resistors. Metal film resistors are also less sensitive to temperature and are less affected by aging.

Metal film resistor

A metal film resistor is a type of fixed resistor that consists of a thin metal film layer deposited on a ceramic substrate. The metal film is usually made of nickel-chrome, and it is deposited in a spiral shape onto the ceramic substrate. The ceramic substrate is a non-conductive material that is used to support the metal film layer. The size and shape of the resistor determine the value of the resistance. The metal film resistors are available in a range of resistance values, ranging from ohms to megaohms.

Metal Oxide Resistor

Metal oxide resistors are a type of resistor that has a layer of metal oxide deposited on the substrate. The metal oxide layer is usually made of tin oxide, and it provides the resistance to the current flow. Metal oxide resistors are more stable and more reliable than carbon resistors. The metal oxide resistor can operate at a high temperature, and it can withstand higher wattage loads than carbon resistors. Metal oxide resistors are also less affected by aging and more accurate than carbon resistors.

Construction of metal film resistor

The construction of the metal film resistor involves a few steps. First, the ceramic substrate is cleaned, and then it is coated with an insulating layer. The insulating layer is usually made of glass or ceramic material, and it protects the ceramic substrate from chemical reactions that could damage it. After the insulating layer is applied, a thin layer of metal film is deposited on the substrate. The metal film spirally covers the substrate, and its width determines the resistance value. Finally, the metal film layer is coated with a protective layer that safeguards the metal film from scratches or damage.

Conclusion

In conclusion, metal film resistor is a crucial component in electronic circuits. Metal film fixed resistors, metal film resistors, and metal oxide resistors are all types of resistors that are used in different applications. The construction of metal film resistor involves depositing a thin layer of metal onto a ceramic substrate that determines the resistance value. If you are interested in purchasing metal film resistors, you can contact us for more information.

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