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In the manufacturing of smart bracelets, the quality of the printed circuit boards used plays a vital role. 4-layer flexible PCB boards are preferred by manufacturers as they offer several advantages that make them ideal for this application. Let’s take a closer look at these boards and why they are the top choice for smart bracelets. First, let’s talk about the product type: 4-layer flexible printed circuit board. The plates are specifically designed to be flexible and can bend and conform to the shape of the smartband. The flexibility of these plates is crucial as it ensures that the device is comfortable to wear and does not restrict movement. In terms of technical specifications, these motherboards are no slouch either. Their line width and line spacing are 0.06mm/0.06mm, providing excellent precision and accuracy. This means the signals and data transmitted within the smartband are clear and reliable, ensuring smooth and uninterrupted performance. Another important factor to consider is the thickness of the board. For a 4-layer Flex PCB board, the thickness is set to 0.2mm. This thickness provides the perfect balance between durability and flexibility, ensuring the board can withstand the wear and tear of daily use while still being flexible enough to be bent and formed.Moving on to the minimum hole diameter, these plates have a minimum hole diameter of 0.15 mm. This specification is critical because it determines the size of vias and holes on the board. The smaller aperture allows for a more precise and compact design, ensuring the smart band remains stylish and beautiful. Copper thickness is another important consideration in the manufacturing process. The copper thickness of the 4-layer flexible PCB board used in smart bracelets is usually 12um. This thickness is ideal for providing adequate conductivity while keeping the overall weight of the device to a minimum. One of the key factors to consider when manufacturing any electronic device is safety. Smart bracelets are no exception. That's why these boards are manufactured using flame-retardant materials with class 94V0. This rating ensures that the circuit board is flame-resistant and will not cause a fire to spread in an emergency. Surface treatment is another important aspect of the manufacturing process. For the 4-layer Flex PCB boards used in smart bracelets, immersion gold is the preferred surface treatment. This treatment not only enhances the circuit board's electrical conductivity, but also provides superior corrosion resistance, ensuring the longevity of the device. When it comes to the aesthetics of your smart bracelet, resistance welding color plays an important role. Most manufacturers choose black as it adds a touch of elegance and sophistication to the overall design. Finally, let's talk about stiffness and applications. The 4-layer flexible PCB board used in the smart bracelet is designed to have the stiffness of a steel plate. This stiffness ensures that the device retains its shape and form even after prolonged use. As for applications, these boards are specifically for smart bracelets. As the demand for wearable technology continues to grow, smart bracelets have gained immense popularity. These devices offer a wide range of features, including activity tracking, heart rate monitoring, sleep tracking, and more. They are designed to fit seamlessly into your daily life to help you achieve your health and fitness goals.