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High Tg Series

High Tg PCB

Why Use a high Tg PCB?

With the rapid development of the electronics industry. particularly the electronic products represented by computers, toward high functionality and multilayer development. The necessity for increased heat resistance of PCB substrate materials as a crucial assurance has become plain. The emergence and development of high-density mounting technology. represented by SMT and CMT, has resulted in PCBs with small apertures, fine lines, and thinning. that is becoming detached from the substrate’s high heat resistance support. The greater the TG value, the better the temperature resistance of the board. thus, high Tg is more employed in various lead-free processes.

What is High Tg PCB?

Tg is the highest temperature at which the substrate may remain stiff. When the temperature reaches a crucial point, the PCB substrate transitions from the glass to the rubber state; this temperature threshold is known as the Tg value. The greater the Tg point, the higher the temperature requirement, the harder and more brittle the pressed board will be, which will affect the quality of the post-process mechanical drilling (if any) and the electrical properties of use. The board’s general Tg is greater than 130 degrees, high-Tg is generally greater than 170 degrees, and medium Tg is approximately greater than 150 degrees; substrate Tg improved, heat resistance of the printed board, moisture resistance, chemical resistance, stability, and other characteristics increased and improved. There are currently three PCB board Tg values, but most people perceive several, which are as follows: ordinary Tg130, medium Tg150, and high-Tg170, where the number represents the temperature.

High Tg PCB Materials

high tg pcb type

Why isn't TG Stated in Material Datasheets?

TGs are not mentioned in the datasheets of some typical high-frequency materials. This is because the original definition of TG was “temperature of glass transition.” Many ceramics and PTFE-based materials contain no glass fibers and so have no technical TG. This is true for Polyimides in general (PI). However, for Polyimide, ceramics, or PTFE-materials, a TG of at least 200°C is commonly assumed. The TG merely stands for thermal resistance in this scenario.

High Tg PCB Classifications


High Tg PCB Series

rogers high frequency


FR4 High Tg 180 PCB

FR4 High TG180 PCB

The Advantages of High TG PCB

If the Tg of the PCB substrate is improved, the heat resistance, chemical resistance, moisture resistance, and stability of the device are automatically enhanced. If the device has a high power density and generates a decent amount of heat, a PCB with a high thermal conductivity (Tg) will be a useful solution for heat management.  excellent heat resistance You can use a larger printed circuit board to change the device’s design and power requirements, as well as a PCB with a high Tg rating, to reduce the heat generated by standard boards. Since multilayer PCB and HDI PCB are more compact and circuit-dense, heat dissipation will be enhanced. Therefore, high Tg PCBs are typically utilized for multilayer and HDI PCBs to ensure production dependability. In PCB fabrication, the difference between normal FR-4 and high-Tg FR-4 is that under heat, particularly after moisture absorption, there are differences in mechanical strength, size stability, adhesion, water absorption, thermal decomposition, and thermal expansion of the material, and high-Tg products are significantly superior to normal PCB substrate materials.

Excellent Mechanical Strength


Higher Density

Long Lifespan

High-Temperature Resistance

Types of High Tg PCB

Rigid High Tg PCB

flex-rigid High tg PCB

Rigid-Flex High Tg PCB


Flex High Tg PCB

High TG PCB Capabilities


Count of layers: 2 to 14
Maximum processing area: 640mm*1100mm
Copper density: 0.5OZ-13OZ
Board density: 0.2mm to 6.0mm thickness for double-layer board
4-layer board: 0.4mm-8.0mm 0.8mm to 8.0mm (6-layer board)
1.0mm-8.0mm for eight plies 10 plies: 1.2mm to 8.0mm
1.5mm to 8.0mm in thickness for 12 ply 1.5mm to 8 millimeters
16-ply: between 1.6mm and 8.0mm 18 plies: 2.2mm to 8.0mm
20-layer board: 2.4mm-8.0mm
Minimum line width/spacing requirements: 3mil/3mil
Minimum diameter of completed product holes: 0.15 mm
The maximum permissible ratio of thickness to diameter: 12:1
Impedance control: +/- 10 percent
Lead-tin spray, pure tin spray, chemically sunken gold, chemically sunken tin, chemically sunken silver, plug gold plating, anti-oxidation
Materials frequently employed: FR4 Tg130/Tg170°C, Rogers, Arlon, Taconic, and Bergquist

Your Qualified High Tg PCB Manufacturer

XFDC-PCB has over 20 years of experience fabricating and assembling a wide range of PCBs, including rigid, flexible, rigid-flex PCBs, and HDI PCBs. Regardless of how simple or complex your requirement is, our cutting-edge equipment and expert team are well-equipped to handle it. When you collaborate with us, you gain access to a wealth of industry best practices that will give you an advantage. We are dedicated to providing quick turnaround times so that you can get to market as soon as possible. Our clients appreciate the fact that we provide prototype quantities as well as large production runs with the same unwavering focus on quality. You can also rely on us for turnkey services and be confident that you will receive high-quality results.

Applications of High Tg Printed Circuit Board

electronic industrial

High TG PCB for Industrial Electronics Applications

The first thing that comes to mind when you think about high tg pcb for industrial electronic applications is computers. However, this category also includes processing plant machinery, sensors, and intelligent electronic devices .

Power supply

High Tg PCB for high current applications

High current applications can benefit power sector devices.

generating electricity produces a substantial amount of heat.

Consequently, proper heat resistance control is necessary.

automobile tg pcb

High Tg printed circuit board for automotive applications

When it comes to automotive pcb, they are the ones to employ; examples include audio-video systems, cooling control systems, vehicle display systems, and safety devices.

High Tg PCB in power supplies & inverters

For input voltage to output voltage converters, PCBS that can withstand heat is necessary.PCBs with a high Tg content can be found in a range of inverters, including those used by consumers and by manufacturers.

RFQ for High Tg PCB

The temperature point is called the glass transition temperature (Tg). The higher Tg point means a higher temperature requirement during lamination. And the boards will be hard and crisp, which will affect the hole and the electrical properties.

When the glass transition temperature (Tg) is over 170°C, it is referred to as a high Tg material. High Tg materials have the following properties: High glass flow temperature value (Tg) High temperature durability.

Tg is the temperature value that guarantees the mechanical stability of the PCB during operational life time of the PCB.

The heat-resistance characteristic of FR4 is denoted by Tg or glass transition temperature where it changes from solid to a soft and rubbery state. Typically, FR4 PCB is rated to have a Tg of 130°C. In other words, if a PCB rated at 130°C is heated beyond its glass transition temperature, it loses its solid form.

The standard FR4 Tg is between 130 – 140°C, the median Tg is 150 °C and the high Tg is greater than 170°C. In the hot state, high Tg FR4 will have better mechanical and chemical resistance to heat and moisture than standard FR4. Below the Tg of different PCB base materials: Base material.

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