High-Tg PCB
High glass-transition (Tg 170) laminates that stay stable through lead-free soldering and high operating temperatures.
Last updated
High-Tg PCB samples
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4L high-Tg TG170 immersion gold PCB
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6L high-Tg TG170 immersion gold PCB, 4/4 mil
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8L impedance-controlled high-Tg PCB
About High-Tg PCB
The glass transition temperature (Tg) is the point where a laminate starts to soften. Standard FR4 sits around Tg 130–140 °C. High-Tg materials at Tg 170 °C or above keep their shape, and their plated through-holes stay reliable, through lead-free reflow, repeated soldering and hot operating conditions.
We supply high-Tg (TG170) boards from 4 to 8 layers with immersion gold finishes, fine lines down to 4/4 mil, and impedance control.
Typical applications
- Automotive electronics
- Industrial controls and power equipment
- Multilayer boards that go through several reflow cycles
- LED drivers
- Servers and networking hardware
Common questions
When should I specify high-Tg FR4?
For lead-free assembly with several reflow passes, thick multilayer boards, heavy copper, or products that run hot. A higher Tg reduces expansion through the board thickness, which protects plated holes from cracking.
Does high-Tg cost more than standard FR4?
The laminate costs somewhat more. If you are not sure which you need, send your design and we can quote both options.
Have a board to build?
Send us your Gerber files and requirements. Our team will review your specifications and get back to you with a quote.