Precision-Engineered 4-Layer PCBs with FR408HR: 1.6mm Thickness, ENIG Finish, and IPC-Class-3 Quality for High-Performance Electronics

Overview:

This product introduction provides an in-depth look at our 4-layer rigid Printed Circuit Boards (PCBs), designed for high-performance applications. These PCBs are manufactured using FR408HR laminate and prepreg, a high-performance material that delivers exceptional thermal, electrical, and mechanical properties. With precise engineering and adherence to IPC-Class-3 standards, these PCBs are ideal for demanding applications such as high-speed digital designs, networking equipment, medical devices, and industrial systems.

Key Specifications:

1. Board Overview:

Board Type: 4-layer rigid PCB.

Material: FR408HR laminate and prepreg.

Solder Mask: Both sides, blue.

Silkscreen Print: Both sides, white.

Surface Finish: ENIG (Electroless Nickel Immersion Gold).

Total Board Thickness: 1.6mm ±10%.

Board Size: 140mm x 160mm (1 piece).

Minimum Hole Size: 0.3mm.

Solder Mask Thickness: 10µm.

Minimum Dielectric Thickness: 100µm.

Minimum Trace Width/Spacing: 102µm.

Blind/Buried Vias: Not supported.

Via Filling and Capping: Supported.

2. PCB Stack-up:
The 4-layer stack-up is designed to optimize signal integrity, thermal performance, and mechanical stability. Below is the detailed layer structure:

3. PCB Statistics:

Components: 92

Total Pads: 201

Thru-Hole Pads: 75

Top SMT Pads: 87

Bottom SMT Pads: 39

Vias: 72

Nets: 8

4. Artwork and Quality Standards:

Artwork Format: Gerber RS-274-X.

Quality Standard: IPC-Class-3 (highest reliability for mission-critical applications).

Availability: Worldwide.

Material Introduction: FR408HR

FR408HR is a high-performance laminate and prepreg system manufactured by Isola. It is designed to bridge the gap between thermal and electrical performance, making it an excellent choice for advanced PCB applications. Below are the key features and benefits of FR408HR:

Key Features:

Glass Transition Temperature (Tg): 190°C (DSC).

Dielectric Constant (Dk): 3.65 @ 10GHz.

Dissipation Factor (Df): 0.0095 @ 10GHz.

RoHS Compliant: Environmentally friendly and free from hazardous substances.

CAF Resistant: High resistance to conductive anodic filament (CAF) formation, ensuring long-term reliability.

Lead-Free Assembly Compatible: Withstands 6x reflow cycles at 260°C and 6x solder float cycles at 288°C.

Thermal Reliability: T260 >60 minutes, T288 >30 minutes.

Flammability Rating: UL-94 V0 (excellent flame retardancy).

Advantages of FR408HR:

Improved Signal Integrity: Lower loss and higher electrical bandwidth, making it ideal for high-speed digital applications.

Enhanced Thermal Performance: Superior moisture resistance during reflow, ensuring reliability in high-temperature environments.

Compatibility with AOI Systems: Laser fluorescing and UV blocking properties enable seamless integration with automated optical inspection (AOI) systems.

Mechanical Stability: Excellent dimensional stability and resistance to warping, even under thermal stress.

Applications:

These 4-layer PCBs are suitable for a wide range of applications, including:

1. High-Density Interconnect (HDI) PCBs:

Ideal for compact, high-performance designs where space is limited.

Supports fine pitch components and high-density routing.

2. High-Speed Digital Circuits:

Ensures signal integrity in demanding environments, such as data centers and telecommunications equipment.

Low dielectric constant and dissipation factor minimize signal loss.

3. Networking and Communications Equipment:

Reliable performance for data-intensive applications, including routers, switches, and servers.

High thermal reliability ensures stable operation in continuous-use scenarios.

4. Medical and Industrial Devices:

Meets stringent reliability and safety standards for medical equipment, such as imaging systems and patient monitoring devices.

Suitable for industrial automation and control systems.

5. Storage and Peripherals:

Optimized for durability and efficiency in storage devices, such as SSDs and HDDs.

Supports high-speed data transfer and thermal management.

Quality and Reliability:

Every PCB is manufactured to meet IPC-Class-3 standards, ensuring the highest level of reliability for mission-critical applications. Key quality assurance measures include:

Rigorous Testing: Each PCB undergoes electrical testing, thermal cycling, and visual inspection to ensure compliance with specifications.

Advanced Manufacturing Processes: State-of-the-art equipment and processes ensure precision and consistency.

Traceability: Full traceability of materials and processes for quality control and accountability.

Availability:

These 4-layer PCBs are available for order worldwide. Whether you need a single prototype or large-scale production, we are equipped to meet your requirements with fast and reliable delivery. Our global supply chain ensures timely delivery to customers in all regions.

Conclusion:

Our 4-layer PCBs, built with FR408HR material, are designed to deliver exceptional performance and reliability. With advanced features such as ENIG surface finish, precise trace widths, and high thermal stability, these PCBs are ideal for a wide range of applications, from high-speed digital designs to medical and industrial equipment. For more information or to request a quote, please contact us.