Printed Circuit Board material must flame-resistant, it can’t be burned at a certain temperature and only be softened. The temperature point is called the glass transition temperature (Tg);Ordinary PCB materials at high temperatures, not only will be softened, deformation, melting and other phenomena, but also the mechanical and electrical properties decline sharply. General FR4 Tg is 130-140 centigrade, moderate Tg is greater than 150-160 centigrade, High-Tg is greater than 170 degrees;The higher of Tg, the better the performance of PCB heat resistance, moisture resistance, chemical resistance, stability and other characteristics.When the working temperature reaches the melting point, that means the temperature exceeds the Tg value, the status of PCB material will be changed from glassy to liquid, which will affect the function of PCB. And this value is related to the stability of the PCB dimension;As usual, made with Tg ≥ 170℃ PCB material, which is called a high Tg printed circuit board. With the rapid development of the electronics industry, high Tg material is widely used in computers, communication equipment, precise apparatus, and instruments, etc.
Layer: 4 SolderMask Color: Green Silkscreen Color: WhiteSurface treatment: Leard free HAL Board Thickness: 1.6mm Min Hole Size: 0.3mm Min line width/ space: 0.2/0.2mm Application: power supply According to the lead-free tin spraying and immersion tin process flow. It can be known that the test station in the lead-free tin spraying process flow is after the lead-free tin spraying process. Even if there is a defect in the lead-free tin spraying process, it can be detected in the subsequent test. So it can better ensure the function of PCB circuit board products. The surface of lead-free tin spray is brighter and beautiful, while the surface of tin sink is pale white and dull. The performance and function of lead-free tin spray products are more stable and reliable.
Surface treatment: Leard free HAL 6 layers Board Thickness: 1.6mmMin Hole Size: 0.3mmMin line width/ space: 0.2/0.2mmApplication: power supplyThe specification of this board is the common specification. This board is used for power supply, material is TG180. SolderMask Color is green, Silkscreen Color is white. As the Tg of the substrate is increased, the heat resistance, moisture resistance, chemical resistance, and stability of the printed board will be improved.The higher the TG value, the better the temperature resistance of the board, especially in the lead-free process, where high Tg applications are more common.