Why Are PCB Core Materials Mostly Yellow?
Copper-clad laminate (CCL) is an important material in PCB manufacturing, it consists of layering copper foil on both sides of a base material. Fr-4 is the most popular base material in the PCB industry, and it is made from layers of glass fiber. When the PCB outer copper foil is etched, the yellow core material underneath will become visible. But why is the core material mostly yellow, while the PCB inks are available in many colors?
PCB core materials were white at the beginning, not yellow. Glass fiber is the main ingredient, which is naturally white or semi-transparent. White cores were common at first, however, their ability to let light through caused problems in PCB performance. So the manufacturers started adding color to the resin, that’s why the yellow cores are standard now.
It is affordable and reliable for most uses of yellow-core materials, but they are not always ideal for all applications. Especially in fields requiring precise light control, such as optical instruments, cameras, and high-end imaging devices. The slight transparency of yellow cores can cause problems. So the copper black PCB or black core PCB solutions in these specialized applications are much better because their light-blocking capabilities are more effective and improve performance.
Copper Black PCB is the Advanced Solution
To meet the needs of specialized industries, FXPCB now offers advanced black core PCB and copper black PCB materials. These materials are designed to improve light control, durability, and performance. Below are the key features of the copper black PCB:
Better Light Blocking: It is ideal for devices that require strict light control, such as cameras, optical tools and high-precision electronics
Improved Flatness: It ensures reliable performance in complicated PCB designs.
Stable Quality: It meets the high standards for the advanced electronic applications
FX PCB supplies black core PCB/ copper black PCB options for these industries where standard yellow core PCBs don’t work well. These advanced solutions are especially useful in fields where performance and reliability are critical, for example, aerospace, medical devices, and high-quality consumer electronics
Conclusion
Yellow core materials are still the standard for most PCB applications, but some industries need more advanced options like black core PCB and copper black PCB. FX PCB has the stock for the copper black PCB, please send us your requirements and PCB files today, and you will get a quotation in 24 hours [email protected]
