High temperature PCB is a PCB designed to withstand high temperatures. These PCBs are also called high Tg PCBs. They are used for high temperature operation.
A normal PCB FR4-Tg is 130 – 140 degrees, the medium Tg is 150 – 160 degrees, and high Tg is greater than 170 degrees.High FR4-Tg with better mechanical and chemical resistance to heat and moisture than standard FR4.
The higher the Tg value, the better the temperature resistance of the material, so high Tg is more and more popular particularly in lead-free process.
