Thin film Resistors and thick film resistors, most common types in the market, are with the similar appearance. It is distinguished by layer thickness. A SMD resistor with layer thickness 0.1 micrometer or smaller, we call it thin film resistor (including metal film resistor). For a 100 micrometer one, that is thick film resistor.
Both of them are based on a resistive layer on a ceramic substrate. Thin film resistors have a metallic film that is vacuum deposited on an ceramic base. Often an alloy of Nickel and Chromium is used (Nichrome). They are produced with different layer thicknesses by abrasive or laser or photo etching to accommodate a range of resistance values. Thick film resistors are produced by firing a special paste onto the substrate. The paste is a mixture of glass and metal oxides.
Due to different constructions, their properties and preferred applications are diverse.
Thin film resistors are widely used in precision applications, such as audio installations, medical equipment, , precision controls and measurement devices. As they feature relatively of low TCR and low noise, high precision and better stability .
Advantages of thick film resistor are not only lower cost, but also the ability to handle more power, provide a wider range of resistance values and withstand high surge conditions. Therefore, these resistors can be found in almost any device with an AC plug or a battery.
Microhm Electronics is a professional resistor manufacture, we provide varied advanced electrical elements to factories and partners with the technology of thin film, thick film, metal foil, metal film, wire wound and EBW.
Technologies of electrical elements are changing everyday. Microhm’s R&D department is trying to learn more knowledge of all levels and accumulate knowledge for technology promotition and new product development.
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