What impact does TG value have on PCB?
When we choose boards for PCB production and proofing, we will need to choose the Tg value of a board. Different Tg values have different costs, which can directly affect the performance of the PCB. So what is the TG value? What impact does TG value have on PCB?
What is the TG value of PCB?
The main material of PCB is epoxy resin. The Tg value of the resin represents the temperature at which it changes from the glass state to the rubber state. That is, the resin material of the PCB is in a hard glass state below the TG temperature. If the temperature reaches above the TG temperature of the board, the epoxy resin will become highly elastic. The state becomes an elastic rubber state. In this case, the electronic product obviously loses its stability and reliability. Therefore, choosing plates with appropriate TG values in different application fields can achieve a balance between cost and performance.
Classification and corresponding applications of PCB TG values
TG130: A common TG value plate with a temperature resistance of about 140℃. Tg130 can meet most common electronic products, such as mobile phones, watches, computers, printers, air conditioners, TVs, etc.
TG150: A medium TG value plate with a temperature resistance of 150℃~170℃. TG150 can meet the needs of industrial-grade PCBs in high-temperature environments. It is commonly used in automobiles, railways, power supplies, etc.
TG170: A high-end TG value plate with a temperature resistance of over 170℃. TG170 is used in electronic equipment that has very high temperature requirements. It is commonly used in aerospace and defense industries.
Conclusion
The Tg value of the PCB board affects the reliability and stability of electronic products. If the PCB operating temperature is higher than the Tg value, the PCB will lose its rigidity. If it drops back below the TG value, the PCB will gradually regain its rigidity. Choosing a board with an appropriate TG value is necessary for the subsequent use of your electronic products.
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