High Frequency PCB Factory

High Frequency PCBs use specialized low-loss materials (like Rogers, Taconic, or Isola) instead of standard FR4 epoxy. These materials maintain stable dielectric constant (Dk) and low dissipation factor (Df) at frequencies above 1GHz, ensuring minimal signal attenuation. They feature tighter impedance tolerances (±5%), smoother copper surfaces (RTF/VLP copper), and hybrid constructions combining RF materials with standard FR4 for cost optimization.

We maintain ±5% impedance tolerance through precision controlled depth routing, laser direct imaging (LDI), and automated optical inspection (AOI). For critical RF traces, we use 3D electromagnetic field solvers (Polar, Si8000) during design validation. Each production panel includes TDR (Time Domain Reflectometry) test coupons, and we provide S-parameter measurement reports up to 40GHz using vector network analyzers (VNA) upon request.

ENIG (Electroless Nickel Immersion Gold) is preferred for most HF applications due to its flat surface and stable contact resistance. For mmWave applications above 30GHz, we recommend Immersion Silver or OSP (Organic Solderability Preservative) to avoid the "skin effect" losses associated with nickel. Selective hard gold plating is available for edge connectors requiring repeated mating cycles in RF test environments.

High-frequency circuits generate significant heat due to conductor losses. We implement thermal vias and copper coin insertion for power amplifier modules. For extreme thermal requirements, we offer Metal Core HF PCBs combining Rogers RO4000 series with aluminum bases, or ceramic-filled thermally conductive laminates. Thermal simulation and TML (Thermal Management Layer) designs ensure consistent performance across -40°C to +150°C operating ranges.