PCBSINO PCB fabrication for High tg PCB, we can use Shegnyi and ITEQ material to meet the customers' requirement. Most PCBs are constructed with material that has a Tg temparature value of Tg180.

Normally high Tg refers to high heat resistance in PCB raw material, the standard Tg for copper clad laminate is between 130 – 140℃, High Tg is generally greater than 170℃, and middle Tg is generally greater than 150℃. if PCB with Tg≥170℃, we call it high Tg PCB.

Do I have to use an FR4 material with a high Tg?
just for lead-free soldering?
PCBSINO answer: not necessarily. There are many factors to be taken into account, e.g. how many layers, the thickness of the PCB and also a good understanding of the assembly process (number of soldering cycles, time above 260 degrees, etc.). Some research has shown that a material with a “standard” Tg value has even performed better than some materials with a higher Tg value. Note that even with “leaded” soldering the Tg value is exceeded.