This PCB is a custom 2-layer rigid high-frequency board fabricated using Rogers RO4835 hydrocarbon dielectric laminate, designed for cost-effective, high-stability RF and microwave circuit applications. It features an immersion gold surface finish, black silkscreen on the top side only (no bottom silkscreen), and a completely solder mask-free double-sided structure. All solder pads are kept free of silkscreen to ensure consistent soldering quality.
PCB Specification
| Parameter Item | Specification |
| Base Material | Rogers RO4835 high-frequency hydrocarbon laminate |
| Layer Count | 2 layers rigid PCB |
| Board Dimensions | 45mm × 83.69mm (1 piece), dimensional tolerance: ±0.15mm |
| Minimum Trace / Space | 5 mils / 6 mils |
| Minimum Mechanical Hole Size | 0.2mm |
| Via Type | Only through-hole vias are utilized, with no blind or buried vias |
| Finished Board Thickness | 0.6mm |
| Outer Layer Finished Copper Weight | 1oz (1.4 mils) for all copper layers |
| Via Plating Thickness | 20μm |
| Surface Finish | Immersion Gold |
| Silkscreen Layer | Top-side black silkscreen, no bottom silkscreen, and no silkscreen coverage on solder pads |
| Solder Mask Layer | Dual-sided solder mask-free design |
| Quality Test | 100% full electrical testing conducted before delivery |
PCB Layer Stack-up Structure
| Layer Name | Specification |
| Copper Layer 1 (Top Layer) | 35μm finished copper thickness |
| Dielectric Core | Rogers RO4835 high-frequency hydrocarbon substrate, 0.508mm (20mil) thickness |
| Copper Layer 2 (Bottom Layer) | 35μm finished copper thickness |
Artwork & Quality Standards
Artwork Format: Manufactured with standard Gerber RS-274-X files to ensure accurate circuit patterning and full production compatibility.
Quality Standard: Strictly manufactured and inspected per IPC-Class-2 standards to guarantee stable performance and long-term durability for industrial and commercial use.
Service Coverage: Global shipping services are available to deliver stable and reliable product supply for high-frequency PCB projects worldwide.
RO4835 Material Overview
Rogers RO4835 is a premium hydrocarbon-based high-frequency laminate with superior high-temperature stability and oxidation resistance compared to conventional thermoset microwave substrates. It exhibits highly consistent electrical and mechanical properties with the classic RO4350B series, delivering reliable high-frequency performance while enabling cost-effective mass manufacturing. Fully compatible with standard FR-4 fabrication processes, the material simplifies production workflows and enhances manufacturing efficiency. Equipped with Rogers proprietary LoPro reverse-treated copper foil, RO4835 achieves ultra-low insertion loss, making it an ideal solution for high-precision, loss-sensitive RF circuit designs.
Core Material Performance Features
Standard Compliance: Complying with RoHS UL 94 V-0 and IPC-4103 standards, the material delivers safe, standardized and reliable performance for commercial, industrial and automotive electronic applications.
Low and Stable High-Frequency Loss: It maintains a stable DK of 3.48±0.05 and ultra-low DF of 0.0037 at 10GHz, minimizing signal attenuation and distortion to ensure precise, stable high-frequency signal transmission.
Superior Thermal Resistance: With a Tg over 280°C, the material features excellent thermal stability, resisting structural and performance degradation under high-temperature processing and operation for prolonged service life.
Controllable Thermal Expansion Performance: Optimized CTE parameters reduce thermal expansion and deformation during temperature cycling, sustaining structural integrity and improving overall PCB reliability in variable thermal environments.
Excellent Oxidation Resistance and Process Compatibility: It offers great oxidation resistance and full lead-free process compatibility, preventing blistering and delamination to enable stable, high-yield mass production.
Precise Dielectric Tolerance and Structural Stability: Tight DK tolerance supports accurate impedance control and signal matching for high-frequency designs, while low Z-axis expansion stabilizes plated vias for consistent fabrication quality.
Cost-Effective Comprehensive Performance: Integrating reliable high-frequency performance, stable mechanical properties and good manufacturability, RO4835 is a high-cost-performance substrate ideal for mass-produced automotive radar, microwave and RF devices.
Typical Application Scenarios
Leveraging its low high-frequency dielectric loss, outstanding thermal stability, superior oxidation resistance and cost-effective processability, PCBs built with Rogers RO4835 laminate are widely applied in high-performance RF and microwave systems for various industrial and commercial scenarios:
- Automotive radar systems and high-precision sensing devices
- Point-to-point microwave communication equipment
- High-frequency power amplifier modules
- Phased array radar systems
- High-performance RF functional components
