Managing Heat Loss Around a Polyimide Heater for More Stable Operation
https://heating-element-insights.westhavenscope.com/posts/pi-heater-design-factors-for-better-temperature-uniformity
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