PCBs must comply with a series of specifications established by the IPC (Association Connecting Electronics Industries)-for instance, IPC-6012 for rigid board performance requirements and IPC-6013 for flexible board standards-covering parameters such as copper foil thickness, line spacing, and thermal resistance. For example, high-frequency PCBs require the use of low-loss substrate materials (such as Rogers 4350B) to minimize signal attenuation, whereas automotive-grade PCBs must pass AEC-Q200 certification to ensure stable operation within a temperature range of -40°C to 125°C.
The design phase necessitates the use of EDA software (such as Altium Designer or Cadence Allegro) to execute layout and routing, while simultaneously addressing critical metrics such as Electromagnetic Compatibility (EMC) and impedance control (e.g., differential pair impedance must be controlled within 100 ± 10 Ω). The manufacturing process encompasses steps such as material cutting, drilling, electroless copper plating, pattern transfer, etching, solder mask printing, and surface finishing (e.g., immersion gold or hot air solder leveling); notably, high-precision equipment (such as Laser Direct Imaging-LDI-machines) enables processing capabilities with line widths and spacing as fine as 0.1 mm.
