How to identify the material of PCB plate
Dimensional stability. In addition to pay attention to X, Y axis (fiber direction and transverse direction), but also to pay attention to the Z axis (plate thickness direction), due to thermal expansion and contraction and heating reduction factors easily lead to fracture of the silver plastic conductor
The name of the circuit board is: circuit board, PCB board, aluminum substrate, high frequency board, thick copper plate, impedance board, PCB, ultrathin circuit board, ultrathin circuit board, printing (copper etching technology) circuit board, etc.. The circuit board makes the circuit miniaturization and intuitive, and plays an important role in the mass production and optimization of the electrical layout of the fixed circuit.
Migration property. Silver and copper is the metal material, prone to oxidation and reduction caused by rust and transitional phenomenon, because of the potential difference is different, worse than copper silver drive is susceptible to silver migration in potential (Silver Migration).
The copper on the copper plated through hole is a kind of continuous crystal, which has very good ductility, and can not reduce the conductivity of the silver and carbon ink when it is heated and cooled.
Electrical and water absorption. A lot of insulator in moisture absorption under the condition of the insulation is reduced, so that the metal poor trend transitional phenomenon in power potential, FR-4 in size, an electrical and water absorption are better than FR-1 and XPC, so the production of silver through hole in printed circuit board, paper substrate to use special FR-1 and XPC the sheet.
