The difference between PCB sheet TG150 and TG170

PCB sheet materials TG150 and TG170 are two PCB substrate materials with different glass transition temperatures.

They differ significantly in several ways. Here is a detailed introduction to these two materials:

Glass transition temperature

Glass transition temperature is the temperature at which a material changes from a glassy to a rubbery state during heating. The glass transition temperature of TG150 is about 150℃, while that of TG170 is about 170℃.

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This means that when the temperature is raised to these specific glass transition temperatures, the substrate changes from a “glassy” state to a “rubbery” state.

The difference between PCB sheet TG150 and TG170

Heat resistance

Since the glass transition temperature of TG170 is higher than that of TG150, its heat resistance is relatively good. In high temperature environments, TG170 can maintain good rigidity and stability and is not prone to softening, deformation, etc. TG150 may be more prone to these problems in high temperature environments.

Mechanical behavior

Mechanical properties are one of the important indicators of PCB sheets, including tensile strength, bending strength, impact strength, etc. Due to the higher glass transition temperature of TG170, its mechanical properties are generally better than those of TG150. This means that TG170 is better able to maintain its shape and dimensional stability when subjected to external pressure or impact.

chemical stability

PCB sheets need to have good chemical corrosion resistance to adapt to various working environments. Due to the higher glass transition temperature of TG170, its chemical corrosion resistance is usually better than that of TG150. This means that in certain chemical environments, TG170 is better able to maintain its stability and integrity.


Due to the higher glass transition temperature of TG170, its production process and material costs are relatively high, so the price is usually higher than TG150. However, considering its better thermal resistance, mechanical properties and chemical stability, it may be worthwhile to choose TG170 for applications requiring higher performance.

Application areas

Since TG170 has a higher glass transition temperature and better heat resistance, mechanical properties and chemical stability, it is usually used in areas that require higher heat resistance, such as high multi-layer printed circuit boards (>10 layer), automobiles, packaging materials, embedded substrates, precision instruments for industrial control, routers, etc. The TG150 is more commonly used in general application scenarios.

To sum up, there are significant differences between PCB sheets TG150 and TG170 in terms of glass transition temperature, heat resistance, mechanical properties, chemical stability and price. When selecting PCB sheets, comprehensive considerations need to be made based on specific application requirements and budget. For application scenarios that require higher performance, such as high-multilayer printed circuit boards, automobiles, etc., choosing TG170 may be a better choice. For general application scenarios, such as ordinary electronic products, it may be more economical and practical to choose TG150.

Which one is more suitable for use on circuit boards, TG150 or TG170?

TG170 is more suitable for use on circuit boards.

Because the circuit board must be flame-resistant, it cannot burn at a certain temperature and can only soften. The temperature point at this time is called the glass transition temperature (Tg point). This value is related to the dimensional stability of the PCB board. The glass transition temperature of TG170 is higher than that of TG150, so its heat resistance is relatively good and can better meet the heat resistance requirements of circuit boards.

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Fumax is committed to producing high quality printed circuit boards and electronic components. We have advanced production equipment and a professional technical team, able to provide one-stop services from design to manufacturing and assembly. We pay attention to details and pursue excellent quality, ensuring that each product meets strict quality standards. We are committed to meeting the needs of our customers, providing high-quality products and services, and assisting the development of the electronics industry.

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