Reliability Checks to Consider Before Approving a PI Heater Design

https://advanced-heat-elements.valiantfield.com/posts/how-to-improve-temperature-uniformity-with-a-polyimide-heater

In sensors, a pi heater must deliver heat in a controlled way. It uses a thin resistive foil circuit laminated in polyimide film. One useful trait is fast response. Still, local hot spots can change the result