RF PCB 2-layer 20mil RO4835 Substrate Black Silkscreen Immersion Gold

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

PCB Layer Stack-up Structure

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