Imagineering, Inc. | https://www.pcbnet.com/blog/understanding-the-pcb-fabrication-process-from-design-to-delivery/
. This industry uses the glass transition (Tg) temperature for this purpose, essentially the temperature at which the material loses its rigidity
Imagineering, Inc. | https://www.pcbnet.com/blog/high-temperature-pcb-considerations-for-high-heat-applications/
? What is a High Temperature PCB? A high temperature circuit board is generally defined as an instance where the glass transition temperature (or Tg
Imagineering, Inc. | https://www.pcbnet.com/blog/when-to-use-fr4-printed-circuit-boards/
. The glass transition (TG) for FR4 is between 115ºC and 200ºC depending on the manufacture. Standard FR4 has a lower TG of 140ºC to 150ºC, while HighTG FR4 is usually around
Imagineering, Inc. | https://www.pcbnet.com/blog/selecting-pcb-materials-for-fabrication/
. In high-heat applications, it is essential that a board continues to work without losing functionality. Glass transition temperature (Tg
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/march/about-us/events/smta-michigan-expo-and-tech-forum-2016
. For example, RoHS requirements have driven printed circuit board assembly materials to ever higher temperature capabilities. The High Tg materials are designed to withstand the higher reflow temperatures of lead free solders but present their own set of problems down the line in subsequent manufacturing steps
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