Material Type：

• Magnetic composite material: Ferrite powder mixed with rubber/resin.
• Carbon-based material: Carbon nanotubes, graphene enhanced polymer.

Application Scenarios：

• 5G equipment, mobile phone antennas, chip packaging electromagnetic interference shielding.

Technical Requirements：

•  Heat Affected Zone (HAZ) Control: Avoid material carbonization or delamination, maintain wave absorption performance.
•  Edge Quality: Prevent burrs from causing electromagnetic reflection leakage.

Process Key Points：

•  Laser Type：
  • High absorption material: Fiber laser (short wavelength) or femtosecond laser.
  • Carbon-based composite material: Green laser (532nm) to improve absorption rate.
•  Parameter Example：
  • Ferrite rubber sheet (1mm): 200W fiber laser, speed 0.8m/min, nitrogen protection.
  • Carbon-based wave absorption layer (0.5mm): Ultraviolet nanosecond laser, energy density 3J/cm², repetition frequency 50kHz.