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N5000 BT epoxy laminate and prepreg provides superior electrical properties for high density aviation, aerospace and commercial boards which require close thickness tolerance and the ability to withstand the stress of multiple soldering excursions and repeated chemical exposure.
In this article, we’ll discuss what really characterizes the N5000 BT epoxy laminate. The relevant information is available for pcb design engineers to refer to in the selection of materials, And you can also call QFPCB to discuss. QFPCB offers the best services when it comes to the high density circuit boards, so please feel free to contact us.
What is The N5000 BT Epoxy Laminate?
The N5000 laminate exhibits a glass transition temperature (Tg) of 185°C by DSC. It incorporates BT (bismaleimide triazine) resin, which offers low dielectric constant (Dk 3.6 @10GHz) and dissipation factor (Df 0.010 @10GHz) values, contributing to overall superior electrical performance. The material has a glossy white finish and demonstrates exceptional flexibility. The N5000 resin system is also well suited for use independently in high performance applications.
A highly recommended product for use with N5000 is the Clear Shot Mist Sealer. This sealer forms a protective barrier that prevents contamination and yellowing caused by exposure to sunlight. Additionally, it functions as an intercoat to ensure a smooth application of paint or finish. These products are essential when working with prepregs.
The N5000 resin system is flexible, durable, and resistant to yellowing. Its low Z-axis coefficient of thermal expansion (Z-CTE) and proven resistance to conductive anodic filament (CAF) formation ensure long term reliability. It demonstrates excellent resistance to oils, solvents, etching agents, and various other industrial chemicals. The resin adheres well to wood, metal, and a wide range of plastic substrates. It offers strong impact resistance and provides clean, precise cuts for welding applications. The BT epoxy laminate is suitable for lead free assembly processes and complies with UL 94V-0 and IPC-4101/30 specifications.
N5000 BT Epoxy laminates combine the high thermal performance of BT resin with the fabrication ease of epoxy, delivering a versatile, reliable, and high performance solution for fine line PCBs, backplanes, BGA multilayers, MCM-Ls, and wireless communication systems.
N5000 BT Epoxy Laminate Data Sheet
The Features of N5000 BT Epoxy Laminate
High Glass Transition Temperature (Tg 185°C by DSC)
The N5000 laminate features a glass transition temperature (Tg) of 185°C, ensuring excellent thermal stability and mechanical integrity during high temperature assembly processes, including multiple reflow cycles.
Dielectric Constant (Dk)
With a dielectric constant (DK 3.6 @ 10GHz), this low Dk value is particularly suitable for general purpose digital and analog circuits, where moderate signal speeds and stable impedance characteristics are required.
Dissipation Factor (Df)
With a dissipation factor (DF 0.010 @ 10GHz) translates to reduced dielectric loss, offering a low dissipation factor (Df). which are essential for maintaining consistent impedance and minimizing dielectric losses in high speed circuits.
BT Resin Chemistry
The N5000 is based on a Bismaleimide Triazine (BT) and epoxy resin blend. This chemistry is key to its high Tg and excellent electrical properties. The BT / Epoxy Blend also significantly improves processing and manufacturability compared to pure BT resins.
Suitable for Lead-Free Processing
It is fully compatible with lead free soldering processes, supporting RoHS compliance and withstanding the higher temperatures (up to 260°C) required for modern surface mount technology.
CAF Resistant and Low Z-CTE
The BT epoxy laminate is engineered to resist Conductive Anodic Filamentation (CAF), a critical failure mode in high density designs. Furthermore, it features a low Z-axis Coefficient of Thermal Expansion (Z-CTE), which enhances reliability by reducing stress on plated through holes during thermal cycling.
The Applications of N5000 BT Epoxy Laminate System
The unique combination of properties makes the N5000 laminate a preferred choice for a wide range of demanding electronic applications.
Fine-Line and High-Density PCBs
N5000 is ideal for high density interconnect (HDI) boards with fine lines, tight spacing, and microvias, where dimensional stability and electrical performance are critical. The dimensional stability of the material is crucial for manufacturing PCBs with very fine trace widths and spacings, supporting today’s miniaturization trends.
Backplanes
Used in telecom and datacom backplanes, N5000 supports high speed data transmission with low signal loss and excellent thermal management. Ensures stable performance in large, multilayer interconnect systems.
Surface-Mount and BGA Multilayers
Perfect for complex multilayer boards with Ball Grid Array (BGA) packages, where thermal cycling resistance and via reliability are essential. Provides excellent dimensional stability for high component density.
MCM-Ls / Direct Chip Attach
It is well suited for Multichip Module Laminates (MCM-Ls) and Direct Chip Attach (DCA) applications, offering the thermal stability and low CTE needed for direct die mounting. Supports advanced packaging technologies requiring reliable performance.
Wireless Communications
This BT epoxy laminate delivers low loss characteristics essential for high speed data and RF designs. Deployed in 5G infrastructure, base stations, and high frequency modules, where low Df and stable Dk ensure signal integrity and system performance.
Manufacturing Advantages of N5000 BT Epoxy Laminate
In addition to excellent material properties, N5000 BT Epoxy laminates are known for their ease of processing. Manufacturers benefit from:
BT / Epoxy Blend for Improved Processing
Unlike pure BT materials, N5000 utilizes a BT/Epoxy blend, which enhances fabrication compatibility improving drillability, resin flow, and adhesion without sacrificing the high thermal and electrical performance of BT resins.
Superior Dimensional Stability
This is a critical advantage of the material. It ensures minimal movement during the thermal stresses of lamination and etching, which is essential for achieving registration accuracy in very high density interconnect (HDI) designs.
Cost-Effective and Readily Available
Despite its advanced BT/epoxy formulation, it offers a cost effective alternative to more exotic high performance materials. Its ready availability makes it a practical choice for both prototyping and high volume manufacturing.
Ultimately, The N5000 BT Epoxy laminates stand out as a balanced solution for next generation PCB requirements. With a high Tg of 185℃, low dielectric properties, CAF resistance, and compatibility with lead free processes, it provides designers and manufacturers with a reliable and economical choice. By choosing N5000 BT Epoxy laminate, manufacturers can achieve superior performance, enhanced safety, and extended product lifetimes.
If you have any further questions, please feel free to leave a comment below or contact QFPCB by email ([email protected]).
