As a premium choice in Rogers’ high-frequency PCB series, the 4-layer immersion gold Rogers 4350B is specifically optimized for high-reliability RF/microwave applications, including 5G base stations, automotive radar systems, and military communication equipment. This ceramic-filled hydrocarbon material maintains a stable dielectric constant of 3.48±0.05 (measured at 10GHz) with an ultra-low dissipation factor of 0.0031, while the immersion gold finish ensures minimal signal loss.
1.Multilayer Structure Advantages
RF PCB manufacturers particularly recommend the 4-layer immersion gold construction for its exceptional interlayer consistency. Using RO4450B prepreg with precisely matched dielectric constant (3.30±0.05) and controlled impedance tolerance (±5%), the gold layer thickness is strictly maintained at 0.05-0.10μm to balance solderability and high-frequency skin effect performance.
2.Thermal Reliability Performance
Test data from high-frequency PCB factories shows the 4-layer 4350B exhibits a Z-axis CTE of only 40ppm/°C during -50°C to +150°C thermal cycling, significantly reducing warpage risks. The immersion gold surface retains >95% conductivity after 96-hour salt spray tests, making it ideal for harsh-environment RF applications.
3.Typical Application Solutions
• 5G Massive MIMO antenna feed networks
• 77GHz automotive radar intermediate frequency modules
• Military frequency-hopping radio power amplifier circuits
This Rogers high-frequency PCB meets IPC-6012EM Class 3 standards, with the 4-layer gold-plated version supporting 0.2mm micro-via processing. RF PCB manufacturers recommend 3D EM simulation for stackup optimization and offer 0.1oz to 2oz copper foil options for varied power requirements.