High TG materials in smt patch factories provide several advantages. For example, high TG materials can increase the continuous operating temperature of circuit boards and allow higher current. These advantages prompt pcb industry to use Hi-TG materials. However, before deciding to use Hi-TG circuit board in smt, there are several things to consider first.
High Tg circuit boards are specially used for high temperature, humidity and irritating chemicals. Therefore, these circuit boards in smt factories are helpful to prolong the service life of electronic equipment. High Tg PCB is an ideal choice for multilayer electronics and high power equipment. They also reduce the risk of short circuit and increase the function.
Compared with ordinary PCB, the advantages of high Tg PCB include better mechanical strength, dimensional stability, adhesion and reduced hygroscopicity. In addition, the high Tg circuit board is resistant to heat, moisture and chemical corrosion, and has high electric shock resistance. This material can also reduce the heat generated by multilayer or high-density circuits.
RoHS regulations are pushing the printed circuit board industry to high Tg circuit boards. For high power density designs that require lead-free solder, these PCBs are the only feasible choice. High Tg PCB can also reduce heat generation, affecting weight, power requirements and size.
High Tg PCB is helpful for extreme environments and equipment, such as jet engines, missiles and automobile parts. For example, mobile phone suppliers spend a lot of time choosing the best materials for their mobile phones, because the components must be able to withstand vibration and impact. Therefore, the use of high Tg circuit boards has increased exponentially in recent years.
High Tg PCB is usually composed of glass fiber reinforced plastics. The Tg value of the circuit board is about 20 to 25 degrees higher than the expected working temperature. When the material is heated beyond this point, it will become glassy, resulting in unstable mechanical structure and electrical properties. Therefore, high Tg PCB should be flame retardant.
