Can Domestic High-Frequency PCB Materials Replace Rogers? A Technical Gap Analysis

The Dominance of Rogers in High-End Applications

For decades, Rogers high-frequency laminates have dominated 5G communications, satellite navigation, and radar systems. While Chinese high-frequency PCB manufacturers are rapidly upgrading their technologies, can domestic materials truly replace imported products? This article analyzes the key technical gaps and breakthrough paths from an engineering perspective.

1. Technical Bottlenecks of Domestic High-Frequency Materials

① Poor Dielectric Stability

• Rogers RO4000 series: Dk variation ±0.05 at >10GHz
• Domestic materials: Dk drift >±0.1 under high temp/humidity, degrading signal integrity

② Higher Loss Tangent (Df)

• Domestic PTFE substrates: Df 0.002-0.003
• Rogers RT/duroid: Df ≤0.001 → 15-20% higher insertion loss at mmWave

③ Multilayer Lamination Defects

• Domestic: Delamination/warpage in 20+ layer boards
• Rogers: Achieves <3% thickness error in 40-layer stacks

2. Three Key Breakthrough Paths for Domestic Alternatives

① Ceramic-Filled Modification

• Nano-alumina/silica composites reduce Dk variation to ±0.08
• Shengyi Tech’s SYT-55 series validated in Huawei 5G base stations

② Low-Roughness Copper Foil

• Reverse-treated foil (RTF) cuts roughness (Rz) from 3μm→1.2μm
• Reduces skin-effect loss at 28GHz

③ Specialty Resin Development

• CAS-developed cyanate ester-benzoxazine copolymer: Df 0.0015 (close to Rogers RO4835)

3. Replacement Progress by Frequency Band

Industry Outlook: From Imitation to Innovation

• Automotive radar: Domestic ultra-low-loss materials already in use
• 3-5 year forecast: Full replacement in consumer electronics, but high-end apps require breakthroughs in:
  • Material purity (≤ppb metal ions)
  • Process control (laser ablation, plasma treatment)