Common Failure Causes in Polyimide Heater and How to Prevent Them
https://wafer-thermal.novacrestiq.com/posts/custom-mica-heating-plate-design-what-engineers-should-define-early
Many heating problems look like a power problem at first. In practice, the cause may be contact, heat loss, sensor position, or poor fit. A polyimide heater works best when these parts are planned together