High Quality High Tg PCB

High Tg PCB board is when the temperature rises to a certain area, the substrate will change from "glass state" to "rubber state", and the temperature at this time is called the glass transition temperature (Tg) of the board. That is, Tg is the highest temperature (°C) at which the substrate remains rigid. Generally, the Tg of the PCB is above 130°C, the high Tg PCB board is generally greater than 170°C, and the medium Tg is about 150°C. Generally, PCB printed boards with Tg ≥ 170°C are called high Tg PCBs.

High Tg PCB Materials

The difference between general FR4 and FR4 of high Tg PCB boards: in the thermal state, especially the mechanical strength, dimensional stability, adhesiveness, water absorption, thermal decomposition, thermal expansion, etc. of the material under heat after moisture absorption. Every situation is different. High Tg PCB products are obviously better than ordinary PCB substrate materials. In recent years, the number of customers who require high Tg PCB boards has increased year by year.

As we all know, the circuit board must be flame-resistant, and it cannot burn at a certain temperature, but can only soften; the temperature point at this time is called the glass transition temperature (Tg point), and this value is related to the dimensional stability of the PCB board. The higher the TG value, the better the temperature resistance of the high Tg PCB board.

Substrates are increasingly inseparable from the high heat resistance of substrates. Therefore, the difference between general FR4 and FR4 high Tg PCB is that mechanical strength, adhesion, water absorption, dimensional stability, thermal decomposition in thermal state (especially after water absorption) are different conditions (such as thermal expansion) The difference, obviously, is that high Tg PCBs are better than common PCB substrate materials. Therefore, there is a great demand for high Tg PCB in recent years, but the price is higher than ordinary PCB.

What's more, high Tg PCB material is also popular in the LED lighting industry, because the cap dissipation rate of LED is higher than that of common electronic components, but the same structure of FR4 board is much cheaper than metal core PCB such as aluminum core PCB.

Advantages of High Tg PCB

High Tg PCB has higher stability: If you increase the Tg of the PCB substrate, it will automatically improve the heat resistance, chemical resistance, moisture resistance and the stability of the device.

High Tg PCB can withstand high power density design: If the device has high power density and relatively high heat generation, then a high Tg PCB will be a good solution for heat management. When reducing the heat generation of common boards, larger printed circuit boards can be used to change the design and power requirements of the device, and high Tg PCBs can also be used.

High Tg PCBs are ideal for multilayer and HDI PCBs: Since multilayer and HDI PCBs are more compact and have dense circuits, they will result in high levels of heat dissipation. Therefore, high Tg PCB is usually used in multi-layer and HDI PCB to ensure the reliability of PCB manufacturing.

High Tg PCB Board Capability

High Tg PCB board means high heat resistance board. With the rapid development of the electronics industry, especially electronic products represented by computers, the development of high-functionality and high-layering requires higher heat resistance of PCB substrate materials as an important guarantee. The emergence and development of high-density mounting technologies represented by SMI and CMT have made PCBs more and more inseparable from the support of high heat resistance of the substrate in terms of small aperture, fine line, and thinning. The Tg of the substrate is increased, and the heat resistance, moisture resistance, chemical resistance, stability and other characteristics of the high Tg PCB board will be improved and improved. The higher the TG value, the better the temperature resistance of the board, especially in the high Tg PCB application in the lead-free process.

The thermal resistance of FR4 material is much higher than that of standard PCB. When selecting the PCB, the TG value should be at least 20-25°C higher than the expected operating temperature of the PCB. For example, if the TG value of the PCB is 170°C, the operating temperature of the equipment should be below 150°C. High Tg PCB boards perform better at high temperatures and have better stability, making them a reasonable solution for high power density designs. The higher the TG of the circuit board, the higher the heat resistance, chemical resistance and mechanical stability of the electronic equipment.

High Tg PCB boards have excellent heat dissipation performance against multilayer PCBs, and HDI PCBs can also generate more heat because the components in multilayer PCBs and HDI PCBs are more compact and the circuits are very dense. High Tg PCBs excel in thermal control, helping to ensure product reliability during operation.

We all know that if electronic devices work for long periods of time, the heat generated during the work will be transferred to other components and ultimately affect the durability and performance of the product. For some feature-rich but size and weight constrained electronic devices, high Tg PCB boards will be a cost effective way to improve thermal management efficiency.

High Tg PCB Application Field

High Tg PCBs are the best solution if the power density in the electronics is higher and heat generation interferes with the heat sink or other parts of the product. In addition, with the development of high Tg PCBs in recent years, it will be found that high Tg PCBs are used in the electronics industry that can operate at higher temperatures. Therefore, we are catering to the needs of customers in different industries by providing high Tg PCBs with high heat resistance that meet customer specifications within short lead times.

Application fields of high Tg PCBs: gateway, radio frequency identification, inverter, antenna board, wireless booster, taitong manufacturing service, low cost PLC, embedded system development, embedded computer system, AC power supply.

High Tg PCB materials are mostly used in high multi-layer printed circuit boards, automobiles, packaging materials, embedded substrates, precision instruments for industrial control, routers and other fields. Therefore, the performance of TG170 and TG150 must be better than TG130 in all aspects.

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