In today’s demanding electronics environment, thermal stability is no longer optional—it’s essential. As devices become smaller, faster, and more power-intensive, engineers are turning to High TG Rigid PCBs to ensure performance and reliability under extreme conditions. Whether you’re building automotive control units, LED lighting modules, or telecom base stations, understanding the role of high glass transition temperature (TG) materials is key to making informed design decisions.
This guide will walk you through everything you need to know about high TG rigid PCBs—from core benefits and materials to real-world applications and pricing.
1. What Is a High TG Rigid PCB?
A High TG Rigid PCB is a printed circuit board made from materials with a high glass transition temperature—typically above 170°C. This thermal threshold marks the point where the PCB substrate shifts from a hard, glassy state to a soft, rubbery condition. Unlike flexible PCBs, rigid PCBs maintain a fixed shape and are structurally solid.
By using high TG materials, these boards can withstand higher reflow soldering temperatures, intensive power loads, and extreme working environments, making them ideal for industrial and high-performance electronics.
2. Why TG Matters in PCB Design
Glass Transition Temperature (TG) is a critical thermal property that directly influences PCB reliability. If the TG value is too low for a device’s operating environment, the PCB may warp, delaminate, or suffer from electrical failure.
Typical TG Classifications:
- Standard TG: 130°C–150°C
- Medium TG: 150°C–170°C
- High TG: >170°C (commonly 180°C or 200°C)
High TG PCBs are especially important for:
- Lead-free soldering (higher processing temperatures)
- Power electronics that generate continuous heat
- Mission-critical environments such as aerospace or automotive systems
3. Core Benefits of High TG Rigid PCBs
Here are the key advantages of using high TG rigid PCBs in your next design:
- Superior Thermal Resistance: Prevents substrate degradation at high temps
- Enhanced Mechanical Strength: Maintains structural integrity during assembly
- Improved Chemical Resistance: Ideal for harsh industrial environments
- Better Dimensional Stability: Reduces board expansion and deformation
- Higher Reliability: Longer lifespan, especially under thermal cycling
4. Common Materials Used in High TG Rigid PCBs
Several advanced substrate materials are used to manufacture high TG PCBs:
- FR4 High TG (e.g., Shengyi S1000H) – Cost-effective and widely used
- Polyimide – Excellent for aerospace and military use, offers TG ~200°C
- Rogers & Panasonic Materials – Preferred in high-frequency applications
- ITEQ IT-180A, KB6167 – Common high TG options in industrial PCBs
📌 Material choice not only affects performance, but also pricing and lead time.
5. Typical Applications Across Industries
High TG rigid PCBs are trusted in industries where reliability and thermal endurance are paramount:
- Automotive: Engine control modules, battery management systems
- LED Lighting: High-brightness and high-power LEDs
- Telecom: Antennas, base stations, and RF power boards
- Industrial Control: Inverters, PLCs, and power distribution units
- Aerospace & Military: Radar systems, avionics, and satellite electronics
6. High TG Rigid PCB Manufacturing Considerations
Manufacturing high TG PCBs requires precise control and experience:
- Pre-baking to remove moisture before lamination
- Specialized lamination profiles for thick or multilayer designs
- Thermal profiling for lead-free solder compatibility
- Thorough testing including thermal shock and stress testing
Sample Price Ranges (USD):
| Specs | Board Size | Layers | TG Rating | Price (100 pcs) |
| FR4 TG170 | 100mm x 100mm | 2L | 170°C | ~$1.20 / pc |
| FR4 TG180 | 150mm x 150mm | 4L | 180°C | ~$2.60 / pc |
| Polyimide TG200 | 100mm x 100mm | 6L | 200°C | ~$4.80 / pc |
➡️ Prices vary based on copper weight, finish (ENIG, HASL), and order volume.
7. How to Choose the Right High TG Rigid PCB Supplier
Here are some key factors to evaluate when choosing a manufacturing partner:
- Certifications: ISO 9001, UL, RoHS, IATF 16949 (automotive)
- Material Expertise: Familiar with high-TG laminates and thermal management
- Engineering Support: Offers DFM checks and stack-up design
- Transparent Pricing: Clear quotes with breakdowns
- Lead Time & Logistics: Fast delivery and global support
8. Conclusion: Is a High TG Rigid PCB Right for Your Project?
If your application involves high temperatures, mechanical stress, or lead-free assembly processes, then High TG Rigid PCBs are the optimal solution. With better heat tolerance, stronger mechanical stability, and longer service life, they are well worth the investment in critical applications.
9. About KingSunPCB
At KingSunPCB, we specialize in manufacturing high-quality High TG Rigid PCBs for global clients in automotive, industrial, lighting, and communication industries.
Core Advantages:
- TG Options: 170°C / 180°C / 200°C
- Layers: 2 to 30
- Minimum hole size: 0.1mm
- Copper weight: up to 6 oz
- Surface Finish: ENIG, OSP, Immersion Silver, HASL
- Pricing: From $1.20/pc depending on specs
- Lead Time: 5–7 working days for standard orders
Get a quick quote today and let our engineering team help you choose the right high TG solution for your project!