What is a thin film resistor?

Thin film resistors are a type of resistor that possess a thin resistive layer sat on top of a ceramic base. The principle difference between thick and thin film resistors is the thickness of this resistive layer, with thin films possessing a thickness of around 0.1 microns.

What’s the difference between thin film and thick film resistors?

Thin film resistors have a metallic film that is vacuum deposited on an insulating substrate. Thick film resistors are produced by firing a special paste onto the substrate. Thin film is more accurate, has a better temperature coefficient and is more stable.

What is the use of film resistor?

Metal film resistors are used when a high tolerance or more accurate value is needed. They are used for bridge circuits, filter circuits, and low-noise analog signal circuits.

What is resistor paste?

These pastes are available from moderately to ultra-low resistance levels. In recent years, for resistor components and built-in resistors, demand has grown for measures to counter the sulfuration of Ag electrodes and improve migration resistance. One measure has been to use copper-based conductors.

What are thick film resistors?

Thick film resistors are produced by applying a resistive film or paste, a mixture of glass and conductive materials, to a substrate. Thick film technology allows high resistance values to be printed on a cylindrical or flat substrate either covered entirely or in various patterns.

What are thin film resistors made of?

Thin film resistors are built on a ceramic base, with the resistive layer sputtered on top using vacuum deposition to create a chip resistor. The material used is commonly an alloy of nickel and chrome called Nichrome.

What is thin film PCB?

The “Thin Film” refers to the thinner thickness of conductor layer on Ceramic PCB, comparing with “Thick Film Ceramic PCB”. Normally the thickness of thin film Ceramic PCB will be less than 10 micron (10 um).

What is cermet film resistor?

Cermet resistors are a type of thick film resistor for which a thicker conducting paste is used. The paste is a mix of both ceramic and metal, thus the term “cermet.” Cermet resistors possess qualities of low noise, good temperature stability, and decent voltage ratings.

What is wirewound resistor?

A wirewound resistor is an electrical passive device that limits or restricts current flow in a circuit. The conductive wire can be made of varying alloys and thickness to control the resistance value. Wirewound resistors are typically used in high power and industrial applications such as circuit breakers and fuses.

What is a thick-film resistor?

Thick-film resistors are often overcoated with a glaze material (typically a borosilicate glass) to protect them against the environment, chemical attack, and mechanical abrasion.

What are the methods of fabricating integrated resistors?

INTEGRATED RESISTORS resistor in a monolithic integrated circuit is obtained by utilizing the bulk resistivity of the diffused volume of semiconductor region. The commonly used methods for fabricating integrated resistors are 1. Diffused 2. epitaxial 3. Pinched and 4. Thin film techniques.

What are the power ratings of film resistors?

Power ratings of film resistors are based on continuous direct-current operation or on root-mean-square operation. Power derating is necessary for operation at ambient temperatures above the rated temperature. In pulse applications, the power dissipated during each pulse and the pulse duration are more significant than average power conditions.

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