Name: China Custom High Tg FR4 PCB Manufacturers Suppliers Factory - ODM High Tg FR4 PCB - STHL
Brand: STHL
SKU: 284517862

Description

Send Inquiry

Material and Structural Advantages

High Tg rigid boards typically use High Tg FR4 Material PCB as the substrate. This specially formulated, modified FR4 material significantly improves heat resistance while maintaining the excellent insulation and mechanical strength of traditional FR4. Common high-Tg grades include 170 °C, 180 °C, or even higher, placing them in the High Temperature PCB category.

Whether in 4-layer, 6-layer, or higher configurations, High Tg Rigid PCBs maintain stable performance in complex stack-ups, meeting the demands of HDI, multi-layer boards, and dense component layouts in high heat-density designs.

Core Performance Advantages

Strong thermal stability: Resists deformation during high-temperature soldering (such as lead-free reflow), reducing delamination and warping.
Excellent moisture resistance: Low water absorption ensures stable electrical performance in high-temperature, high-humidity environments.
High mechanical strength: Maintains strength and dimensional stability even near the Tg temperature.
High PTH reliability: Copper plating in hole walls resists cracking during thermal cycling, extending service life.
Thermal shock resistance: Withstands repeated heating/cooling cycles, reducing material fatigue.

Typical Applications

Communications equipment: 5G base station main control boards, optical modules
Automotive electronics: Engine Control Units (ECUs), on-board radar systems
Industrial control: High-power driver boards, inverter control boards
Medical equipment: Monitors and testing devices used in high-temperature sterilization environments
High-power electronics: High-power power supplies, inverters, LED drivers

In these applications, the high-temperature tolerance and long-term stability of a High Tg board are critical to ensuring reliable equipment performance.

Why Choose STHL for High Tg FR4 PCBs?

As a PCB manufacturer with many years of experience, STHL exercises strict control over material selection and process details in High Tg FR4 PCB production:

Precise material selection: Tg grade matched to operating temperature, thermal cycle count, and soldering process.
Mature processes: Supports multi-layer, high-density, high-precision fabrication to ensure dimensional and performance stability.
Cost–value balance: While high-Tg materials have a slightly higher unit price, their stability and longevity in high-temperature environments can significantly reduce long-term maintenance costs.
Multi-industry experience: Proven track record in communications, automotive, industrial and medical.

FAQ

Q1: What is the difference between High Tg FR4 PCBs and standard FR4 PCBs?

A1: The main difference is the higher glass transition temperature. Standard FR4 has a Tg of about 130–150 °C, while High Tg FR4 PCBs can reach 170 °C, 180 °C, or higher. This provides better dimensional stability, mechanical strength, and electrical performance in high-temperature environments-ideal for high-temperature, high-power, and high-reliability applications.

Q2: Will High Tg FR4 PCBs cost much more than standard boards?

A2: The unit price is slightly higher, but their stability and extended lifespan in high-temperature environments can significantly reduce long-term maintenance and repair costs, making them a cost-effective investment for long-term projects.

Q3: What industries use High Tg FR4 PCBs?

A3: They are widely used in communications (e.g., 5G base station control boards), automotive electronics (ECUs), industrial control (high-power driver boards), medical equipment (monitors for high-temperature sterilization), and aerospace (satellite communication modules, flight control systems). All these sectors have strict requirements for the high-temperature tolerance and long-term stability of High Tg boards.

Q4: Are High Tg FR4 Material PCBs compatible with lead-free processes?

A4: Yes. They are fully compatible with RoHS-compliant high-temperature lead-free reflow soldering and are less prone to deformation, delamination, or warping during soldering.

Q5: How should I choose the right Tg grade?

A5: Select based on the product's operating temperature, thermal cycle count, and soldering process. For example, if the circuit's operating temperature is ≥150 °C, we recommend a High Temperature PCB with Tg ≥180 °C to ensure long-term stability and reliability.

Q6: In high-temperature, high-humidity environments (e.g., 85°C/85% RH), by how much is the degradation of insulation resistance and arc resistance in high-Tg FR4 slower compared to standard FR4? Is there any relevant accelerated ageing test data available?

A6: Tg FR4 exhibits significantly slower insulation performance degradation than standard FR4 under harsh conditions of 85°C/85% RH. We can provide comparative test reports from material suppliers (e.g., after 1000 hours of ageing, the insulation resistance retention rate of high-Tg FR4 typically exceeds that of standard FR4 by more than an order of magnitude), and commit to employing rigorous board baking processes alongside traceable, certified laminates.