How Ramp Rate and Thermal Cycling Affect a PI Heater Application

https://smart-heating-solutions.zenbloomer.com/posts/wafer-heater-design-considerations-for-12-inch-semiconductor-wafers

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