PCB how to achieve high temperature

After the circuit board is produced, it will be used in electronic products. We know that many electronic products are in a relatively harsh environment. How do circuit boards be used in these environments? In fact, from the design process, the relationship can be said to be minimal, mainly to choose the type of material to match.

From the point of view of the use of electronic products, the heat resistance of the circuit board is much stronger than that of the above IC chip and capacitor resistance. Therefore, the internal heat-resistant circuit board of electronic products is still OK. Many people think that the mobile phone or the computer is broken. The circuit board is burned out. In fact, in this case, many parts on the circuit board are concentrated due to thermal burn-out. The heat-resistance of the circuit board has been produced from minus tens of degrees to 280 degrees. In the case of the fpc circuit board, the circuit board produced using PI can exist in a 200-degree environment for a certain period of time, but this When the solder used to assemble the circuit components is melted, the circuit board in this environment is virtually unusable except for the circuit board itself. In this case, using cable connections to avoid board appearance in this environment is a good choice.

The ability of the circuit board to withstand high temperatures depends on the material. First, the heat resistance of the copper foil from the substrate is the best for the circuit board material (mainly for the FPC circuit board), and the cover film and the PI are also Can withstand 280 degrees temperature, in addition to the PET material can not withstand higher temperatures in the reinforcing material, FR4, PI and steel, shrapnel, etc. can withstand relatively high temperatures, and steel sheets used as a reinforcing material will make The circuit board has good heat dissipation and enhances the heat resistance of the circuit board.

Even if the general circuit board is used outdoors, the temperature to be tolerated will not be very high. The circuit board on the power supply battery will have a higher temperature due to heat concentration, but the protection board can withstand. In the operating environment where the operating temperature is even higher, in addition to the use of heat-dissipating tools, it is also possible to use aluminum-based circuit boards (the heat dissipation capability of aluminum is very good). So the temperature that the circuit board can bear is decided by the making material, the whole circuit board is decided by the fixed part above.