Today, demands for electronic components are getting higher, with requirements containing smaller size, better reliability, higher integration and cheaper production. This paper presents some results of the work on voltage-controlled oscillators (VCO), especially on the problem of integration of resistors. The benefits coming from using thick film materials are low cost production, reliability and rigidity. The paper describes the behavior of thick film cermet resistors integrated in a multilayer structure based on Fodel dielectric material. Trimming in such multilayer structures is not always possible. Our goal was to asses this behavior with regard to resistor design and their resulting value. The effect of the refiring process and the interaction between resistor material and dielectrics was investigated.
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