What Is a High TG PCB?
A High TG PCB is a printed circuit board fabricated using high glass transition temperature (TG) laminate materials, typically with TG values above 170°C, 180°C, or even 200°C depending on application requirements.
The glass transition temperature (TG) refers to the temperature at which the PCB substrate transitions from a rigid state to a softened state. A higher TG value means better thermal resistance, structural stability, and reliability under heat stress.
High TG PCB is widely used in:
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Automotive electronics
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Power supply systems
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Industrial control equipment
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Server and telecom infrastructure
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Multilayer high density PCB designs
Why Choose High TG PCB?
1. Improved Thermal Stability
High TG PCB maintains structural integrity under:
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High operating temperatures
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Lead-free soldering processes
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Multiple reflow cycles
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High current and power loads
Compared to standard FR-4 PCB, High TG PCB resists warpage, delamination, and mechanical deformation.
2. Better Reliability in Multilayer PCB Structures
Modern electronics often require:
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8–20+ layer stack-ups
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High density routing
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Microvias and buried vias
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Heavy copper layers
High TG PCB provides improved resin stability, reducing the risk of cracking or separation during lamination and thermal cycling.
3. Enhanced Mechanical Strength
High TG PCB offers:
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Stronger bond strength
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Higher decomposition temperature (Td)
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Lower Z-axis expansion
This ensures better via reliability and long-term durability in demanding environments.
4. Suitable for Lead-Free Assembly
Lead-free soldering temperatures can reach 245–260°C. High TG PCB is better suited to withstand:
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High reflow temperature
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Multiple soldering cycles
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High temperature component attachment
This makes High TG PCB ideal for automotive and industrial electronics.
Applications of High TG PCB
High TG PCB is commonly used in:
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Automotive control modules
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Electric vehicle power systems
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Industrial automation equipment
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High power LED drivers
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Telecom infrastructure boards
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Server and data center systems
These applications demand thermal resistance, mechanical stability, and long-term reliability.
High TG PCB vs Standard FR-4 PCB
| Feature | High TG PCB | Standard FR-4 PCB |
|---|---|---|
| TG Value | ≥170°C | ~130–150°C |
| Thermal Resistance | High | Moderate |
| Multilayer Stability | Excellent | Limited |
| Lead-Free Compatibility | Strong | Moderate |
| Reliability | High | Standard |
High TG PCB is the preferred solution for high temperature and high reliability environments.
Manufacturing Considerations
Producing High TG PCB requires:
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Controlled lamination process
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Proper resin flow management
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Accurate stack-up design
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Tight dimensional control
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Thermal reliability testing
An experienced PCB manufacturer ensures consistent quality and stable production performance.
Conclusion
High TG PCB provides superior thermal resistance, mechanical stability, and multilayer reliability compared to standard PCB materials.
For automotive electronics, industrial systems, and high power applications, High TG PCB ensures long-term durability and stable performance under thermal stress.
Choosing a professional High TG PCB supplier guarantees consistent quality, precise fabrication, and reliable high temperature PCB performance.
