PCB Tech - How to ensure the normal operation of the circuit board at high temperatures

How to ensure the normal operation of the circuit board at high temperatures

The working environment of the circuit board is different, and the material is required to be different. Some need to work in a low temperature environment, and some need to work in a high temperature environment. This requires the material of the circuit board to choose the corresponding material according to the actual situation. Let’s talk about it today. Talk about what kind of material should be used for multi-layer PCB circuit boards in a high temperature environment above 100 degrees.

The following is about the circuit board needs to work at 150 degree Celsius for a long time, can it meet the requirements?

When it comes to temperature issues, here is the choice of the Tg value in the PCB board. First, let's talk about the Tg value. The Tg value refers to the glass transition temperature of CORE, which can be understood as the softening temperature of the board., In the ordinary TG130, the TG150 of the TG is higher than the TG170 of the TG, and the Tg value of the FR-4 glass fiber sheet used for different temperatures is different, such as:

About 130-140 degrees Celsius, the Tg value of common FR-4 glass fiber sheets can be used.

At a temperature of about 170 degrees Celsius, this can use the Tg value of the sheet of the FR-4 high temperature step. Generally, it works at this temperature for a long time. The circuit board factory will recommend the Tg170 value, which has high stability.

At a temperature of about 260 degrees Celsius, the Tg value of the polyimide material is used.

Regarding the customer’s proposal to work at a high temperature of 150°C for a long time, the engineers of the Zhongke Circuit Board Factory suggested that "to ensure the stability of the product, it is recommended to choose Shengyi TG170 sheet, which can withstand the high temperature of 150°C for a long time."

Regarding the thickness of the PCB multilayer board, it is increased according to customer requirements, and the thickness can be processed.

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