Designing Heating Zones in a PI Heater for Better Thermal Balance

https://flexible-thermal-guide.timeforchangecounselling.com/how-a-kapton-heater-provides-heat-in-space-constrained-designs

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