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Jarnistech > Tuc PCB > TUC TU-872 SLK SP

In the dynamic landscape of electronic manufacturing, precision and reliability are paramount. As a leading circuit board manufacturer, we understand the critical role materials play in achieving optimal performance. Introducing TU-872 SLK SP PCB materials, a cutting-edge solution engineered for the demands of high-performance circuitry.

TU-872 SLK SP stands as a testament to innovation. Crafted from a high-performance modified epoxy FR-4 resin, reinforced with novel woven glass, and designed with extra-low dielectric constant, these materials redefine the possibilities for high-speed, low-loss, and high-frequency applications.


TU-872 SLK Sp is formulated with a high-performance modified epoxy FR-4 resin, strategically engineered to meet the rigorous demands of advanced circuit board applications. This cutting-edge material is reinforced with an innovative woven glass substrate, meticulously designed to deliver an exceptional combination of properties, including an extraordinarily low dielectric constant and dissipation factor.

Tailored for high-speed, low-loss, and high-frequency circuit board requirements, TU-872 SLK Sp surpasses industry standards. Notably, it is environmentally conscious, accommodating lead-free processes while seamlessly integrating with traditional FR-4 procedures. The laminates crafted from TU-872 SLK Sp showcase outstanding coefficient of thermal expansion (CTE), unmatched chemical resistance, resilience against moisture, robust thermal stability, resistance to conductive anodic filament (CAF), and heightened toughness, attributed to a specialized allyl network-forming compound.

In essence, TU-872 SLK Sp stands as a pinnacle choice for circuit board designers seeking a material that harmonizes advanced technological requirements with environmental considerations, ensuring reliability and performance excellence in a broad spectrum of applications.

Performance and Processing Advantages

TU-872 SLK SP PCB materials offer a host of unparalleled performance and processing advantages, making them a preferred choice for discerning circuit board designers. The key attributes include:

Excellent Electrical Properties:

TU-872 SLK SP demonstrates outstanding electrical performance, meeting the stringent requirements of advanced electronic applications.

Low Dielectric Constant:

With a dielectric constant of less than 3.5, TU-872 SLK SP ensures efficient signal transmission and minimizes signal loss, crucial for high-frequency applications.

Low Dissipation Factor:

The dissipation factor of less than 0.010 underscores the material’s capability to maintain signal integrity by minimizing energy loss.

Stable and Flat Dk/Df Performance:

TU-872 SLK SP exhibits consistent and flat performance in terms of both dielectric constant (Dk) and dissipation factor (Df), providing reliability across a range of frequencies.

Compatibility with FR-4 Processes:

Designed to seamlessly integrate with most FR-4 processes, TU-872 SLK SP facilitates ease of use in various manufacturing environments.

Lead-Free Process Compatibility:

TU-872 SLK SP is compatible with lead-free processes, aligning with environmentally conscious manufacturing practices without compromising on performance.

Improved Z-Axis Thermal Expansion:

The material boasts enhanced thermal expansion properties along the z-axis, contributing to improved overall thermal performance and reliability.

Anti-CAF Capability:

TU-872 SLK SP incorporates anti-conductive anodic filament (CAF) features, ensuring resilience against potential conductive failures and enhancing the overall lifespan of the PCB.

Superior Dimensional Stability, Thickness Uniformity, and Flatness:

The materials exhibit exceptional dimensional stability, uniform thickness, and flatness, crucial for maintaining precise geometries and ensuring optimal performance.

Excellent Through-Hole and Soldering Reliability:

TU-872 SLK SP excels in through-hole reliability and soldering performance, contributing to the overall durability and functionality of the assembled circuit board.

Therefore, TU-872 SLK SP PCB materials provide a comprehensive suite of advantages, combining exceptional electrical properties with compatibility, stability, and reliability, making them an ideal choice for high-performance electronic applications.

Disadvantages and Challenges

While TU-872 SLK SP PCB laminates offer numerous advantages, it’s important to consider potential disadvantages and challenges associated with their use. These may include:

Cost Considerations:

High-performance materials often come with a higher price tag. Designers need to weigh the benefits against the cost implications, especially in projects with strict budget constraints.

Specialized Processing Requirements:

TU-872 SLK SP may have specific processing needs that differ from standard materials. This could require specialized equipment or processes, potentially adding complexity to manufacturing.

Limited Availability:

Being a specialized material, the availability of TU-872 SLK SP may be limited compared to more common PCB laminates. This could lead to challenges in sourcing the material, especially for larger production runs.

Learning Curve for Designers:

Designers accustomed to working with traditional materials may face a learning curve when incorporating TU-872 SLK SP into their designs. This includes understanding and optimizing its unique properties for specific applications.

Environmental Considerations:

While TU-872 SLK SP is designed to be environmentally friendly and lead-free, the production process and end-of-life disposal should be considered. Environmental regulations may impact the material’s suitability for certain applications.

Compatibility with Certain Chemicals:

Although TU-872 SLK SP exhibits superior chemical resistance, it may not be compatible with certain chemicals in all situations. Designers need to carefully evaluate the chemical environment in which the PCB will operate.

Thickness Limitations:

The material may have limitations in terms of thickness options. This can be a constraint for designs that require specific thicknesses to meet mechanical or electrical requirements.

Market Acceptance:

The acceptance and familiarity of TU-872 SLK SP in the market may influence its adoption. Designers should consider whether the material is widely accepted and supported by manufacturers and suppliers.

Custom Fabrication Challenges:

Customizing or fabricating TU-872 SLK SP laminates for specific design requirements may pose challenges, especially if the customization needs are intricate or unconventional.

Testing and Validation:

Verifying the performance characteristics of TU-872 SLK SP may require specialized testing procedures. Designers should ensure that the material meets industry standards and performance requirements through thorough testing and validation processes.

Despite these potential challenges, many of them are typical considerations when working with advanced materials. Designers can mitigate these challenges through careful planning, collaboration with experienced manufacturers, and thorough testing to ensure the suitability of TU-872 SLK SP for the intended application.

Industry Approvals of TU-872 SLK SP

TU-872 SLK SP has garnered industry approvals and certifications, underscoring its compliance with recognized standards and specifications:

IPC-4101E Type Designation:

TU-872 SLK SP holds IPC-4101E Type Designations including /29, /99, /101, and /126. These designations signify adherence to specific standards and performance criteria outlined by the IPC.

IPC-4101E/126 Validation Services QPL Certified:

The material has received IPC-4101E/126 Validation Services QPL (Qualified Product List) certification, further confirming its reliability and conformance to industry benchmarks.

UL Designation – ANSI Grade: FR-4.0:

TU-872 SLK SP is designated under UL (Underwriters Laboratories) with an ANSI Grade of FR-4.0. This classification aligns with the recognized industry standard for flame-retardant materials used in electronic applications.

UL File Number: E189572:

The material is associated with UL File Number E189572, indicating that it has undergone evaluation and testing by Underwriters Laboratories for compliance with safety and performance standards.

Flammability Rating: 94V-0:

TU-872 SLK SP has achieved a 94V-0 flammability rating, demonstrating its superior resistance to combustion and compliance with stringent fire safety standards.

Maximum Operating Temperature: 130°C:

The material is rated for a maximum operating temperature of 130°C, ensuring stability and reliability even in applications with elevated temperatures.

These industry approvals collectively affirm TU-872 SLK SP’s suitability for a wide range of electronic applications, providing designers and manufacturers with the confidence that the material meets or exceeds established standards for safety, performance, and reliability.

Standard Availability of TU-872 SLK SP PCB Laminates Materials

TU-872 SLK SP PCB laminates materials are readily available in standard configurations, providing flexibility to meet diverse design requirements. The standard availability specifications include:


TU-872 SLK SP is available in a range of thicknesses, spanning from 0.002” [0.05mm] to 0.062” [1.58mm]. This extensive thickness range caters to various application needs and allows designers to select the most suitable thickness for their specific requirements. The material is available in both sheet and panel forms, providing versatility in manufacturing processes.

Copper Foil Cladding:

The copper foil cladding options for TU-872 SLK SP encompass a range from 1/3 to 5 oz for both built-up and double sides. This diversity in copper foil thicknesses offers designers the flexibility to choose the appropriate cladding for their specific circuit board designs, accommodating varying conductivity and thermal requirements.


TU-872 SLK SP prepregs are available in either roll or panel form. This availability in multiple forms facilitates ease of integration into different manufacturing processes, providing options for efficient and streamlined production.

Glass Styles:

The material is offered with different glass styles, including 106, 1080, and 2116. These glass styles contribute to the overall performance and characteristics of the laminate, allowing designers to tailor the material to specific electrical and mechanical requirements.

By offering this range of standard options, TU-872 SLK SP enables circuit board designers to select the most appropriate combination of thickness, copper foil cladding, prepreg form, and glass styles for their unique applications. This flexibility in standard availability enhances the material’s usability across a wide spectrum of electronic designs and manufacturing processes.


In the ever-evolving realm of electronic manufacturing, TU-872 SLK SP PCB materials empower us to push boundaries and deliver solutions that meet the highest industry standards. With excellent electrical properties, compatibility with FR-4 processes, and certifications such as IPC-4101E and UL, TU-872 SLK SP ensures not just performance, but reliability.

As we usher in a new era of electronic innovation, our commitment to providing state-of-the-art materials remains unwavering. TU-872 SLK SP is not just a material; it’s a catalyst for excellence, setting the stage for circuit board designs that define the future. Elevate your electronic creations with TU-872 SLK SP – where precision meets possibility.

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