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High-TG PCBs High Temperature PCB fr4 Material

High-TG PCB:

The Glass Transition Temperature (Tg) is one of the most important properties of any epoxy and is the temperature region where the polymer transitions from hard, glassy material to a soft, rubbery material.

Circuit board material must flame-resistant, it can’t be burned at a certain temperature and only be softened. The temperature point is called the glass transition temperature (Tg).

The higher Tg point means a higher temperature requirement during lamination. And the boards will be hard and crisp, which will affect the hole and the electrical properties.

Ordinary PCB materials at high temperatures, not only will be softened, deformation, melting and other phenomena, but also the mechanical and electrical properties decline sharply. 

General FR4 Tg is 130-140 centigrade, moderate Tg is greater than 150-160 centigrade, High-Tg is greater than 170 degrees.

The higher of Tg, the better the performance of PCB heat resistance, moisture resistance, chemical resistance, stability and other characteristics.

FR4 is a code name for the grade of Epoxy Glass material.

Tg means Glass Transition Temperature.

When the working temperature reaches the melting point, that means the temperature exceeds the Tg value, the status of PCB material will be changed from glassy to liquid, which will affect the function of PCB. And this value is related to the stability of the PCB dimension.

As usual, made with Tg ≥ 170℃ PCB material, which is called a high Tg printed circuit board. With the rapid development of the electronics industry, high Tg material is widely used in computers, communication equipment, precise apparatus, and instruments, etc.

Check PCBWay High-Tg PCB manufacturing capabilities in the following table:

FeatureCapability
MaterialTg140 FR-4,Tg150 FR-4,Tg170 FR-4,Tg150 FR-4 (Halogen-free), Tg170 FR-4 (Halogen-free)
Min. Track/Spacing2mil
Min. Hole Size0.15mm

Finished Cooper

0.5-13oz
Board Thickness0.2-6mm
Surface FinishingHASL lead free,Immersion gold, OSP, Hard Gold,Immersion SIlver,Enepig
Solder MaskGreen, Red, Yellow, Blue, White, Black, Purple, Matte Black, Matte green
SilkscreenWhite, Black
Via ProcessTenting Vias,Plugged Vias,Vias not covered
TestingFly Probe Testing (Free) and A.O.I. testing
Build time7-10 days
Lead time2-3 days

Product Data sheet: Download(PDF) IT-180A

Product Data sheet: Download(PDF) TU768

Product Data sheet: Download(PDF) S1000-2 S1000-2B

Product Data sheet: Download(PDF) S1170G S1170GB

More information please check here:

High-Tg PCB Instant Quote

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