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High-TG PCB
A high Tg (glass transition temperature) PCB is a printed circuit board that has a glass transition temperature of at least 170°C. The glass transition temperature is the temperature at which the resin matrix in the PCB softens and begins to flow, which can cause the board to deform or warp.
High Tg PCBs are used in applications that require high reliability and stability, such as in aerospace, defense, and telecommunications industries. They are also used in applications that require high thermal resistance, such as in power electronics and LED lighting.
To achieve a high Tg, the PCB is manufactured with special materials, such as high-performance resin systems and glass fabrics with a high level of thermal stability. These materials help to maintain the structural integrity of the board at high temperatures, allowing it to withstand thermal stress and maintain its dimensional stability.
High Tg PCBs are more expensive than standard PCBs, but they offer improved performance and reliability in high-temperature applications.
High Tg PCB Materials
High Tg PCB materials refer to materials with a high glass transition temperature (Tg), which is the temperature at which the material transitions from a hard and brittle state to a more flexible state. High Tg materials are commonly used in printed circuit board (PCB) manufacturing, especially in applications where high thermal stability and reliability are required. Here are some of the commonly used high Tg PCB materials:
FR-4: This is a common PCB substrate material made from woven fiberglass cloth and an epoxy resin binder. It has a Tg of around 130°C, which makes it suitable for most electronic applications.
High Tg FR-4: This is an improved version of FR-4 with a higher Tg of around 170°C. It is used in applications that require higher thermal stability, such as high-power applications and automotive electronics.
Polyimide: This is a high-temperature plastic that has a Tg of around 250°C. It is often used in applications that require high thermal stability, such as aerospace and military electronics.
PTFE (Teflon): This is a high-temperature plastic with a Tg of around 120°C. It is commonly used in applications that require low dielectric constant, such as high-frequency and microwave circuits.
Ceramic: This is a high-temperature material that has a Tg above 500°C. It is commonly used in high-power and high-temperature applications, such as power electronics and sensors.
When selecting a high Tg PCB material, it’s important to consider the specific requirements of your application, such as thermal stability, mechanical strength, and electrical properties, to ensure the material is suitable for your needs.
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High Tg PCB Types
There are several types of high Tg PCBs available, each with its own unique properties and characteristics. Some of the common types of high Tg PCBs include:
Standard high Tg PCBs: These are PCBs that use standard high Tg materials such as FR-4 with Tg values of around 170°C. They are widely used in a variety of applications.
Halogen-free high Tg PCBs: These are PCBs that use halogen-free materials such as halogen-free FR-4 with Tg values of around 170°C. They are environmentally friendly and comply with regulations such as RoHS and WEEE.
Low-loss high Tg PCBs: These are PCBs that use low-loss materials such as PTFE or ceramic with Tg values above 170°C. They are ideal for high-frequency and microwave applications.
Heavy copper high Tg PCBs: These are PCBs with thick copper layers for high-current applications. They use high Tg materials with Tg values above 170°C for improved thermal stability.
When selecting a high Tg PCB type, it’s important to consider your specific application requirements and choose a PCB type that can meet your needs. ELIPCB offers a range of high-quality high Tg PCB types that can meet a wide range of applications.
High Tg PCB Applications
High Tg PCBs are widely used in a variety of applications where high thermal stability and reliability are required. Here are some of the common applications of high Tg PCBs:
Aerospace and defense electronics: High Tg PCBs are commonly used in aerospace and defense electronics due to their high thermal stability and ability to withstand harsh environments.
Automotive electronics: High Tg PCBs are used in automotive electronics to improve their resistance to heat and vibration, which are common issues in automotive applications.
Power electronics: High Tg PCBs are used in power electronics to improve their thermal performance and reliability, especially in high-power applications.
High-speed digital and RF applications: High Tg PCBs with low-loss materials such as PTFE are used in high-speed digital and RF applications to reduce signal loss and improve signal integrity.
LED lighting: High Tg PCBs are used in LED lighting applications to improve their thermal performance and increase their lifespan.
Medical electronics: High Tg PCBs are used in medical electronics due to their high reliability and ability to withstand sterilization processes.
Overall, high Tg PCBs are essential for applications that require high thermal stability and reliability, making them ideal for a wide range of industries and applications.