Know What Are High-TG PCBs

High-TG PCBs
Know What Are High-TG PCBs

Intricately designed, multilayered printed circuit boards are hugely in demand across industries because of the advancements in electronics and its implementation in industrial systems, products, machines and equipment. TG refers to heat resistance in terms of glass transition temperature. High-TG PCBs are required in extremely high temperature applications. High-TG PCBs must have at least 25-degree Celsius higher temperature resistance than the actual operating environment temperature. Also, these boards must be capable of withstanding smoke, flame, corrosion, and so on aside from elevated temperatures. While these high-TG PCBs are already used in high-temperature industrial applications, they have evolved over the years and continually improved in terms of performance. This post discusses the developments happening in this regard.

About High-TG PCBs

Glass transition temperature materials may be used for the entire board or only in some portions. These materials are super soft and flexible and hence increase the flexibility of the board in those areas. This is essentially flame resistant and is certainly not vulnerable to high heat in terms of melting, deforming, changes in chemical properties, and so on. FR4 TG is a widely used material for high-TG PCBs, which is epoxy glass material with glass transition temperature ability, more than or equal to 170 degrees Celsius. Here are some peculiar features of high-TG PCB materials aside from heat resistance.

  • They have excellent shock, thermal, and vibration resistance.
  • They are PTH reliable and thermal stress resistant.
  • They have a lower Z-axis CTE.
  • They are widely used is computers, telecom or data communication equipment, industrial equipment, automotive components and so on.

Developments in High-TG PCBs Segment

The ever increasing demand for high-power component and the need for rapid heat dissipation has driven the growth of high-TG PCBs as a business segment. This is because if you choose regular PCBs with materials that can resist heat say up to 150 degrees Celsius which is also the operating environment temperature, the boards would gradually deform with continued use. Regular PCBs do not serve the purpose of high heat generating applications, and hence the need for high-TG PCBs. Here are some developments in this regard.

  • As mentioned, this segment is evolving, and more types of materials that can be used are under study.
  • According to a market research report by Precedence Research, the overall PCB market is estimated to reach a size of USD 128 billion by 2030 at a CAGR of 5.66%. It was valued at USD 78 billion in 2021.
  • High-TG PCBs as a segment of the overall PCB market is estimated to significantly contribute to this growth. This is primarily owing to the rising demand for electronic gadgets across the world.
  • Over the last four to five years, experiments have been conducted and materials that can withstand temperatures up to 210 degrees Celsius have been developed.
  • To maintain a reliable PTH ability, positive etchback is essential. In this regard, plasma treatment is developed and implemented which enhances positive etchback and a strong PTH for high-TG boards.

If you are an OEM looking for PCBs for high-temperature environments, or make a product that has multiple digital functionalities or produces heat, you may require high-TG PCBs. Ensure you partner with a reliable PCB manufacturer and assembler that has enough experience in this segment. Twisted Traces is a custom circuit board manufacturer and assembly service provider offering high-TG PCBs for specific applications. The company offers end-end services from ideation and design, right up to installation and aftersales, and everything in between. The company uses advanced PCB manufacturing processes, materials, and fabrication techniques.

PCB Online Quote  PCB Quote

Customer Evaluation