16+ Years Experience in PCB Manufacturing

  • 1-40 layers, Rigid, Flex and Rigid-Flex
  • Middle TG150°C, High TG 170°C-250°C
  • Impedance Control, Heavy Copper 20 oz
  • High Speed, High Frequency, Ceramic, PTFE
  • ISO9001:2015, ISO 13485:2016 Certified & UL Listed
  • Blind & Buried Vias, Micro Vias, Any-Layer HDI
  • Backplane, Back Drill, Embedded Devices, IC Substrate

Why Is High Tg PCB Needed?

What are high TG PCBs?

TG is the abbreviation of the transition temperature. It is the temperature at which the material will change from a rigid state to a flexible and rubbery state.

The TG value of a standard FR4 PCB is around 130-140 °C, so we usually regard the material with a TG value of 150 or above as high TG material. The most frequently used high TG material has a TG value between 170-180°C, but some FR4 material has a higher TG of around 200-220°C. Besides, polyimide material can reach a TG value of 250 or above.

The following points summarized by Viaison illustrate why high Tg PCB is needed.
  • High Tg PCBs are more robust and can withstand higher temperatures than traditional circuit boards.
  • The high PCB Tg can provide excellent thermal stability for components. Thus, the performance and reliability can be improved.
  • High Tg printed circuit boards have increased chemical resistance, providing better protection from corrosive environments.
  • They can reduce the risk of heat damage, given that they can disperse heat effectively.
  • They also offer enhanced electrical insulation properties, allowing them to deal with higher voltage levels more efficiently.

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    Viasion -- Providing the Right High Tg PCB for Your Applications

    Extensive knowledge & experience

    Viasion has extensive technical and application knowledge and more than 16 years of practical experience in high Tg printed circuit boards fabrication. Such knowledge and experience enable us to serve our customers effectively and quickly.

    Highest quality

    Our pragmatic attitude, advanced technology, rich experience and excellent products have won the trust of our customers by supplying the highest quality printed circuit boards.

    Competitive pricing

    Utilize the complete supply chain in Shenzhen and our experienced production/engineering team, we can also supply high-quality high Tg PCB boards at low prices.

    Quick delivery

    We cocus on small to medium-volume production, so we can always deliver our products in a short lead time. We can finish PCBs in 24 hours as quick production.

    Firm commitment

    We will give our customers the best support and the most reliable guarantee in all aspects, such as price, technology, lead time and warranty.

    High Tg PCB: The Ultimate Guide

    If you want to know more about PCBs made with High Tg material, here is the complete introduction. Here in Viasion, we can produce high TG FR4 PCBs, high TG Flex PCBs, high TG multilayer PCBs etc. Please get in touch with our sales team for any of your high TG PCB manufacturing demands. 

    Advantages of High Tg Value

    Benefits of Using High Tg PCB

    Base Materials for High Tg PCB

    The base materials for High Tg printed circuit boards are as follows.

    Main Applications of High Tg PCB

    Different Types of High Tg PCB

    Considerations for High Tg PCB Designs and Layout

    A few key factors must be considered when designing PCBs made by high TG materail to ensure successful and reliable performance. High Tg materials are prized for their superior heat resistance and reliability, so special attention needs to be paid when designing High Tg boards.

    First, high Tg materials require careful component selection – high Tg boards are generally designed to hold components with high thermal requirements, such as high-speed processors and ASICs. High Tg boards also require careful trace design – high Tg traces need more space to prevent heat buildup, meaning that high Tg board layouts often have a higher component density than standard PCBs.

    Additionally, high Tg boards must have adequate via design. High Tg vias have a higher thermal resistance than standard vias, meaning High Tg board designs need to be designed with both High Tg and standard vias to ensure the highest performance possible.

    Finally, high Tg boards require careful power layout design. High Tg boards are susceptible to power delivery, and high Tg board designs must be carefully planned to ensure that all components receive adequate power.

    High Tg PCBs can provide superior performance and reliability in various applications with proper attention to component selection, trace design, via design, and power layout design.

    High Tg Circuit Parameters & Specification

    High Tg Circuit Parameters & Specification refer to the parameters that define and quantify a high Tg circuit.

    High Tg circuit parameters are essential to guarantee that the high Tg circuit can perform its design functions without any issues or breakdowns.

    When selecting a high Tg circuit, it is crucial to consider the operating temperature, thermal stability range, voltage ratings, current interruption capacity, etc.

    Troubleshooting High Tg PCB Fabrication Challenges

    Regarding the fabrication of PCBs with high TG, specialized processes and equipment are required to construct them properly.

    There are a few points to keep in mind to fabricate High Tg printed circuit boards. For example, they require higher temperatures than other printed circuit boards during the fabrication. They also need special organic finishes to withstand high temperatures and protect the board from damage. They may need thicker copper traces to withstand the extreme temperatures they are exposed to better.

    When troubleshooting High Tg printed board fabrication challenges, it is essential to identify the root cause of the issue. It can be done by carefully examining the board design and working with experienced engineers and fabricators who understand this kind of PCBs.

    Environmental Considerations for High Tg PCBs

    Never ignore environmental considerations when selecting high Tg printed circuits for different applications.

    According to Viasion’s experience in high Tg PCB boards manufacturing, environmental factors such as temperature fluctuations, humidity levels, and chemical exposure can impact its performance and should be considered when selecting them. In addition, they are not biodegradable, so proper handling is vital to ensure that they do not cause environmental pollution. They can also contain hazardous substances such as lead and cadmium, so their disposal should comply with all legal and environmental regulations.

    We should be mindful of the potential environmental impacts linked to high Tg PCBs, ensuring that they are used responsibly.

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    Viasion Technology is your trusted partner & one-stop shop for PCB fabrication, components sourcing, PCB assembly and electronic manufacturing. With more than 16 years of experience, we have been supplying high-quality PCBs with competitive pricing for 1000+ customers worldwide. Our company is ISO9001:2015 Certified & UL Listed, and all our products are 100% E-tested and inspected by AOI & X-RAY to meet the highest industry standards. So please get an instant quote from our sales team now, and we will take care of the rest.

    Frequently Asked Questions

    “TG” is glass transition temperature”. It is easier to think that it is the highest temperature the resin can withstand still to be solid.

    High Tg PCBs are circuit boards with high glass transition temperatures. The “Tg” is the temperature at which the material changes from solid to rubbery. We usually call high TG if it is more than 150°C.

    High Tg PCBs have better temperature resistance.
    High Tg PCBs’ heat, humidity, chemical, and stability resistance are improved.

    High TG PCBs are widely used in almost all industrial areas, such as:
    Power and energy
    Industrial equipment
    Communication equipment
    Precision instruments and meters
    LED lighting industry
    Radio Frequency Identification
    Antenna Board
    Wireless Boosters
    Embedded System Development
    Embedded Computer System
    AC Power Supplies

    The manufacturing process of high TG PCB is the same as production of standard TG PCB. The following describes the simplified manufacturing process for high Tg PCBs.
    Sheet Cutting →Out layer copper processing→ Lamination → Drilling → Plated through hole → Exposure → Development → Pattern plating → De-filming →Etching→ De-tinning → AOI inspection → Solder mask → Silkscreen→ Surface finish → V-cut→ Cleaning → Testing → Packaging

    High Tg PCBs are typically more expensive than standard printed circuit boards.

    When designing high Tg PCBs, it is crucial to consider the materials cost, the layout of the circuit board, the high-temperature requirements, etc.

    The testing methods are as follows.
    Electrical Test
    Automated Optical Inspection
    Visual Defects Inspection
    Solderability Test
    Thermal Test
    Tape Test (adhesion test)
    Peel Test (conductor peel strength)
    Ionic Contamination Test

    Viasion will conduct a series of quality control measures for all the products. High Tg PCB is no exception. The following states the main ways of testing and inspection in Viasion.
    DFM(Design for Manufacturing) Check
    IQC (Incoming Quality inspection) for all materials
    Micro-section inspection
    Electrical Test for Open/short
    Automated Optical Inspection
    Visual and mechanical inspection after every process
    First Article Inspection
    Solderability Test
    Thermal Test
    Tape Test (adhesion test)
    Peel Test (conductor peel strength)
    Ionic Contamination Test
    Inspect according to IPC-A-600 Class 2 and IPC Class 3
    TDR Impedance test
    Hi Potential Testing (Hi Pot PCB Testing).
    Any other tests customers required

    The following factors are the cost considerations for high Tg PCBs.
    Base material
    The dimensions of the PCB
    The number of layers of the PCB
    Copper layer thickness
    PCB overall thickness
    Layer structure
    Surface treatment
    Unique technology like blind and buried vias, via plugging, countersink holes, etc.

    The expected lifespan of a High Tg PCB depends on many factors, including the quality of the materials used in its production and the operating conditions. Usually, the shelf life of PCB bare board is 1-3 years, and the usage lifespan is more than 10 years. 

    Generally, high TG printed circuit boards are more expensive than normal TG PCBs. For example, FR4 material with a TG of 135°C is standard, FR4 with TG150 is 10% more expensive, FR4 with TG170 is 20% more expensive, and FR4 with TG180 is around 30% more expensive.