How Cutouts, Edges, and Openings Affect a PI Heater Layout

https://thin-heater-technology.clarionvale.com/posts/how-transparent-conductive-layers-are-used-in-a-glass-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