How Cutouts, Edges, and Openings Affect a Polyimide Heater Layout
https://high-precision-heating.lumenforgex.com/posts/mica-heater-basics-understanding-high-temperature-surface-heating
In precision electronics, a polyimide heater must deliver heat in a controlled way. It uses a patterned resistive foil circuit insulated by polyimide film. One useful trait is custom shapes. Still, excess watt density can change the result