Abstract
Thick-film resistors are widely used passive components. Considering circuit design and layout, decoupling the resistance from geometry is desirable. Inkjet printing offers an approach to reach this aim by allowing for in-process blending of resistor inks. To model the electric behavior of printed resistors, a conductance based linear model is derived, that is both, physically plausible and mathematically convenient. Generally the model is based on resistor layers connected in parallel. To allow for fine graduation the parallel layers are not just realized with different decadic inks but with a discrete number of ink mixtures (“virtual inks”) which are generated in-situ during printing. Both, the conductance model and the in-process ink blending are proven by real inkjet-printed resistors. For manufacturing these resistors, the used inkjet printing system was improved.
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