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

https://heater-design-center.birchreport.com/posts/common-pi-heater-selection-errors-and-how-to-avoid-them

In etch equipment, a semiconductor heater must deliver heat in a controlled way. It uses a resistive heating element integrated with an electrically insulating structure. One useful trait is repeatable heat delivery