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What is Black FR4(Black core) PCB?

by: Jul 03,2023 1630 Views 0 Comments Posted in PCB Basic Information

PCB Black FR4 Black Core

Black Core PCB is a special type of printed circuit board that features a distinct appearance and characteristics compared to traditional PCBs. It is named after the black substrate material used between the two copper foil layers of the PCB. Black Core PCB has gained wide applications in the field of electronic manufacturing and design. 

Why Use Black Core PCB?

Apart from the stylish black appearance, it is also crucial to keep light away from sensitive components, especially for certain sensors. To block light, black solder mask can be utilized, but it should be noted that due to the mask's gaps, there are areas on the PCB that are not fully covered. Therefore, there is still a possibility of light passing through the PCB in small amounts. Depending on your application and the sensitivity of the sensors, you may consider using black FR4 material to mitigate this potential issue. Only black FR4 is completely non-transparent and does not allow any light to pass through.

Advantages of Black Core Board

  • Excellent Heat Dissipation: Black Core PCB utilizes a black thermal conductive substrate as its core, providing outstanding heat dissipation performance. The black substrate efficiently absorbs and dissipates heat, effectively reducing the temperature of circuit components, thus enhancing system stability and reliability. Therefore, Black Core PCB is particularly suitable for high-power applications and heat-sensitive electronic devices.
  • Durable and Long-lasting: Compared to traditional PCB materials, Black Core PCB material offers excellent durability and long-term adaptability. The relatively stable Black Core PCB material can withstand cracking and damage caused by temperature variations, reducing the risk of failures due to heat. This durability ensures the reliability of Black Core PCB during long-term use, prolonging the lifespan of the equipment. Therefore, choosing Black Core PCB material ensures that devices installed with this PCB can operate stably for extended periods, reducing the frequency of maintenance and replacements, resulting in economic and practical benefits for users.
  • Improved Signal Transmission Performance: Black Core FR4 material has a lower dielectric constant and dissipation factor, leading to improved signal transmission performance in Black Core PCBs. The low dielectric constant reduces signal propagation losses within the circuit board, minimizing signal attenuation and distortion. Additionally, the lower dissipation factor allows Black Core PCBs to more effectively control the heat generated during signal transmission, reducing thermal interference with the signals.
  • Attractive Appearance: For consumer electronic products that require a visually appealing appearance, Black Core PCB can be an ideal choice. Black Core PCB offers an attractive appearance, with the printed circuit board presenting a sleek look while hiding the copper traces within the black surface. This design enhances the visual aesthetics of Black Core PCBs. Whether visible in open devices or observed from the exterior edges of the PCB, Black Core PCB provides a satisfying visual effect. The black color of Black Core PCB not only adds to the product's allure but also coordinates well with other components and casings, elevating the overall visual quality of the product. For product designs that pursue high-end and stylish aesthetics, the appearance of Black Core PCB adds a unique beauty to electronic devices.

Considerations When Design Black Core PCB

  • Heat Management: Effective heat management is crucial and cannot be overlooked when designing Black Core PCB. Black Core PCB is widely used in high-power applications due to its excellent heat dissipation characteristics. Implementing proper heat management measures ensures that the Black Core PCB operates within a safe temperature range, preventing adverse effects on circuit performance.
  • Material Compatibility: The material selection for Black Core PCB needs to be compatible with other components, which is essential for ensuring reliability. The compatibility between the core material and other components is a critical factor because long-term stability can only be achieved when there is good compatibility between materials. Incompatibility between different components may result in short-term PCB operation without reliability and longevity.
  • Signal Transmission Stability: Signal transmission stability is of utmost importance when designing Black Core PCB. The heat dissipation properties of Black Core PCB effectively address heat-related issues during signal transmission, ensuring smooth and interference-free signal transmission.
  • Uniform Power Distribution: Achieving uniform power distribution is crucial in the design of Black Core PCB. This means ensuring that power signals are evenly distributed across the entire PCB to provide the appropriate power supply to all sections. Non-uniform power distribution may result in areas with excessively high or low voltage, leading to circuit failures or performance degradation.

Applications of Black Core Board

  • Automotive Electronics: Black Core PCB can be used in automotive electronic products such as vehicle infotainment systems, dashboard controls, and Advanced Driver Assistance Systems (ADAS). The black core layer enhances visual aesthetics and provides a stylish appearance.
  • Consumer Electronics: Black Core PCB can be used in various consumer electronic devices where visual appeal is crucial. Examples include high-end audio equipment, smartphones, tablets, and wearable devices.
  • LED Lighting: Black Core PCB is commonly used in LED lighting applications. The black substrate helps improve contrast and light reflection, enhancing the lighting effects.
  • Industrial Control: Black Core PCB can be utilized in industrial control systems, automation equipment, and machinery. These circuit boards provide electrical connectivity and stability while maintaining an attractive appearance in industrial environments.
  • Gaming and Entertainment: Black Core PCB can be applied in gaming consoles, arcade machines, and other entertainment systems. The fashionable black exterior adds a touch of sophistication to the gaming experience.

It should be noted that the choice to use a black core PCB is mainly due to aesthetic considerations or specific design requirements. While they can provide a visual enhancement, black core PCBs are similar to regular PCBs in terms of functionality. The specific application of black core PCB may vary depending on the industry and product needs.

Specification of PCBWay GF113 series (FR-4-BK) A2 grade copper clad foil 

PCBWay can provide clear soldermask and black core PCB, when you place an PCB order, you can check Black FR4 (black core) in Customized Services and Advanced Options in the PCB Specification Selection, as below picture shown.

Note: This material is not available and needs to be purchased. It would be a lot more expensive and take a long time to produce. You can make an inquiry for the price and delivery time.

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