Experience with Trimming of Chip Resistors and how to Improve Trimming Results with CAD Simulation and Thick Film Process Control

High speed chip resistor trimming requires a more advanced technology than just passive network‐trimming. Some guidelines have to be observed to obtain a good approach to the desired goal. One fast and inexpensive way of finding the best parameters for a trim cut, i.e., maximum speed and best accuracy, is CAD‐network simulation. Last but not least several parameters should be checked and controlled continuously to optimise yield.