2-Layer WL-CT350 4mil Ultra--thin PCB Laminate with Immersion Gold Finish

Product Specification

The 2-layer WL-CT350 PCB is a high-stability, cost-efficient high-frequency circuit board engineered for modern microwave and RF signal transmission applications. Utilizing premium WL-CT350 organic polymer ceramic copper-clad laminate and 1oz outer copper cladding, this ultra-thin 0.2mm rigid PCB features high-reliability Immersion Gold surface finishing, top-only black silkscreen, and a solder-mask-free dual-sided design that optimizes high-frequency electrical performance and thermal dissipation.

What Is WL-CT350? Material Introduction

WL-CT350 is a high-performance thermoset resin-based high-frequency copper-clad laminate reinforced with organic polymer ceramic fillers and fiberglass fabric. Its dielectric layer is formulated with hydrocarbon resin, composite ceramic particles, and fiberglass substrate, delivering exceptional low-loss electrical characteristics optimized for high-frequency circuit designs. Unlike complex and hard-to-process PTFE materials, WL-CT350 adopts FR4-compatible manufacturing workflows, which greatly simplifies PCB fabrication, improves production consistency, and ensures stable batch-to-batch quality, making it an ideal domestic alternative to imported high-frequency laminates.

The proprietary composite combination of hydrocarbon resin and ceramic fillers grants WL-CT350 outstanding high-temperature endurance and robust thermal dielectric stability. This material series maintains steady dielectric constant and loss factor across varying temperatures, features low thermal expansion, and achieves a high glass transition temperature (Tg) above 280°C. These properties guarantee consistent electrical performance and structural integrity under prolonged high-frequency operation and fluctuating thermal conditions.

Core Features of WL-CT350 PCB Material

Engineered to balance low-loss high-frequency performance, reliable thermal stability, and excellent processability, WL-CT350 high-frequency laminates fully satisfy the precision and mass-production requirements of commercial RF and microwave circuits:

Key Performance Benefits of WL-CT350 PCB

WL-CT350 organic polymer ceramic high-frequency material integrates premium RF performance, simplified manufacturability, and long-term reliability, offering outstanding comprehensive advantages for commercial high-frequency PCB mass production:

FR4-Compatible Processing: Fully compatible with conventional FR4 fabrication procedures, featuring simpler processing workflows compared to PTFE-based materials and effectively reducing manufacturing complexity and operational costs

Superior Batch Consistency: Adopts a stabilized composite formulation that delivers uniform dielectric parameters and mechanical performance across mass production batches

Excellent Environmental Stability: Ultra-low moisture absorption paired with robust thermal resistance maintains stable circuit performance in complex and harsh working environments

Cost-Effective Import Substitution: Matches the high-frequency performance of premium imported laminates at a lower cost, serving as an optimal cost-effective solution for large-scale commercial RF applications

Key PCB Construction Specifications

2-Layer WL-CT350 PCB Stack-up Structure

PCB Circuit & Component Statistics

Accepted Artwork Format: Customers from the global can standard Gerber RS-274-X design files for quotation and manufacturing.

Quality Standard: All custom PCBs are manufactured and inspected in strict accordance with IPC-Class-2 industry standards to ensure stable batch quality and long-term operational reliability.

Global Service: We provide worldwide quotation support, professional technical consultation, and global shipping services for all PCB orders.

Typical Application Scenarios

• Base station antennas and satellite antennas
• Automotive radar, sensors, and navigation systems
• Power amplifiers
• Satellite high-frequency heads
• RF devices and filters
• WIMAX antennas and distributed antennas

In summary, the ultra-thin 2-layer WL-CT350 rigid PCB leverages advanced organic polymer ceramic composite technology to deliver low dielectric loss, stable thermal dielectric coefficients, ultra-low moisture absorption, and high Tg performance. Featuring FR4-friendly processing, copper-matched thermal expansion, and outstanding cost performance, this high-frequency PCB serves as a premium alternative to imported materials, ideal for base station communications, satellite equipment, automotive radar, and a wide range of RF and microwave devices.