high Tg PCB

Why is high Tg PCB the preferred choice for extreme environments?

High Tg PCB refers to the temperature point at which the substrate transitions from a "solid" state to a "rubber state" when the temperature rises to a certain range, which is called the glass transition temperature (Tg) of the circuit board.

Tg represents the temperature required for a material to transition from the "solid" state to the "rubbery" state, measured in degrees Celsius. Usually, the Tg of materials is above 130 ° C, while high Tg is usually above 170 ° C, and medium Tg is approximately above 150 ° C. PCBs with a Tg of 170 ° C or higher are commonly referred to as high Tg PCBs.

Advantages of high Tg PCB

Stability:

High Tg PCBs have excellent heat resistance, chemical corrosion resistance, and moisture resistance, making them highly suitable for equipment in harsh environments.

Heat dissipation:

High Tg PCBs can efficiently dissipate heat, which is crucial for high-power density devices and high heat generating devices such as high-performance computer processors.

Suitable for multi-layer and HDI PCBs:

High Tg materials are often the ideal choice for multilayer boards and HDI PCBs because they can maintain reliability in complex designs.

Industry Applications

Industrial control:

Programmable logic controllers (PLCs) that involve cutting, grinding, welding, and metal melting operations in long-term manufacturing processes require high Tg PCBs to ensure reliability, as these devices generate high temperatures and vibrations.

Automotive Electronics:

High Tg PCBs are crucial for the automotive industry, especially for engine control units and other electronic components that must withstand high temperatures during vehicle operation.

Communication equipment:

Used for devices that require high temperature and high frequency stability, such as wireless base stations and fiber optic communication equipment.

High Tg PCB material

FR４
FR4 is a laminated composite material made of glass fiber cloth and epoxy resin, known for its flame retardant properties. FR4 has high moisture resistance and temperature fluctuation, which is very important for high Tg PCBs. It effectively dissipates heat, ensuring the stability of conductors and dielectric materials.

IS410
This laminated board and prepreg material achieved a Tg value of 180 ° C. It can withstand multiple temperature fluctuations and has passed high-temperature soldering tests, reaching up to 288 ° C. IS410 is also suitable for lead-free soldering in PCB industrial production.

IS420
This high-performance epoxy resin material exhibits excellent thermal performance and has a lower coefficient of thermal expansion compared to standard FR4 materials. It can block ultraviolet radiation, making it very useful for automatic optical inspection in PCB manufacturing, suitable for applications that require high stability.

Venture Isola-G200
This is a hybrid material of polyimide/triazine (BT) and epoxy resin, which performs well in thermal performance, mechanical strength, and electrical performance compared to most BT epoxy materials, making it a common choice for high-density multilayer PCBs that require reliability.

High Tg PCBs are crucial for coping with extreme temperature, humidity, and chemical environments. A high Tg value represents better heat and moisture resistance, allowing PCBs to exhibit excellent stability and reliability under extreme conditions.
Shijiazhuang Linke Electronics Tech Co.,Ltd specializes in producing various high multi-layer precision circuit boards and high Tg PCBs, ensuring excellent stability and reliability of electronic devices under extreme conditions. If needed, you can contact us at any time.