Detailed Analysis of Key Parameters of Rogers RO4350B High-Frequency Laminate

Detailed Analysis of Key Parameters of Rogers RO4350B High-Frequency Laminate

Rogers RO4350B is a high-peRFormance circuit material designed for high-frequency and microwave applications. Its key parameters span electromagnetic properties, thermal stability, mechanical strength, and process compatibility. Below is a detailed breakdown of its core characteristics:

1. Electromagnetic Properties

• Dielectric Constant (Dk):
  RO4350B has a Dk of 3.48±0.05 (at 10 GHz) with tight tolerance, ensuring stable signal transmission and impedance consistency25.

• Dissipation Factor (Df):
  At 10 GHz, Df is as low as 0.0037, minimizing high-frequency signal loss for mmWave and high-speed digital circuits210.

• Frequency Stability:
  Dk and Df remain stable across a wide frequency range (1 MHz–10 GHz), supporting 5G and radar applications37.

2. Thermal Performance

• Coefficient of Thermal Expansion (CTE):
  Z-axis CTE is 32 ppm/℃, close to copper foil (17 ppm/℃), reducing interlayer stress during thermal cycling26.

• Temperature Stability:
  Dk temperature coefficient is +40 ppm/℃, with <2% fluctuation from -40℃ to +125℃36.

• High-Temperature Resistance:
  Glass transition temperature (Tg) >280℃ and decomposition temperature (Td) up to 425℃, suitable for high-power RF designs57.

3. Material Structure & Processability

• Composite Composition:
  Woven glass-reinforced hydrocarbon/ceramic structure combines PTFE-like electrical performance with epoxy-like processability, supporting standard PCB fabrication27.

• FR-4 Compatibility:
  No plasma pretreatment required (unlike PTFE), enabling cost-effective hybrid stacking with FR-438.

• Dimensional Stability:
  Low in-plane CTE and superior dimensional control for high-density multilayer designs211.

4. Mechanical & Reliability Parameters

• Mechanical Strength:
  High flexural strength and impact resistance for automotive radar and vibration-sensitive applications111.

• Flame Retardancy:
  UL 94V-0 certified for high-power equipment57.

• CAF Resistance:
  Inhibits conductive anodic filament formation, enhancing long-term reliability27.

5. Key Applications

• Wireless Communications: Cellular base station antennas, microwave P2P links713.

• Automotive Electronics: 77 GHz radar, sensors513.

• Aerospace: Satellite LNBs, radar systems713.

• Consumer Electronics: RFID tags, high-speed digital circuits58.

Parameter Comparison & Advantages