From Prototype to Production: Scaling a Custom PI Heater Project

https://engineered-heater-lab.lucialpiazzale.com/polyimide-heater-basics-how-thin-film-heating-elements-work

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