As an indispensable component in electronic products, circuit boards undertake the vital tasks of electrical transmission and connection. The colours we observe on pcb boards are actually the hues presented by their surface coating materials. Common coating colours include yellow, green, red, blue, and others. So why are different colours applied to circuit boards? There are primarily two reasons:
- Facilitating identification
Throughout the development, production, and utilisation of circuit boards, clear identification is essential at every stage. To facilitate inspection, tracking, and distinguishing the purpose of different boards, manufacturers employ colour-coded designs. - Corrosion Resistance
The chemical properties of the coating materials differ across colour variants. Distinct colours signify different coating compositions, thereby conferring varying levels of corrosion resistance. This enables circuit boards to adapt to diverse operational environments and applications.
Characteristics and Applications of Colour-Coded PCB Boards
- Yellow PCB Boards
Yellow pcb boards represent one of the most prevalent types, utilising epoxy resin coatings renowned for their exceptional electrical insulation properties. These boards exhibit superior electrical and mechanical properties, finding extensive application in computing, telecommunications equipment, industrial instrumentation, and other sectors. - Green PCB Boards
Green pcb boards are the most prevalent in electronic products, utilising highly resilient fibreglass as their cover layer material. They also possess excellent electrical and mechanical properties, playing a vital role in LED displays, lighting equipment, power switches, and automotive electronics. - Red Circuit Boards
Red pcb boards are high-speed variants utilising Teflon as the cover layer material. These boards exhibit high-frequency transmission capabilities and exceptionally stable signal propagation, primarily serving high-end applications such as radar communications, radio, and broadcasting. - Blue Circuit Boards
Blue pcb boards are manufactured from specialised materials, featuring an environmentally friendly, lead-free cover layer. Beyond their ecological credentials, these boards offer high-precision machining capabilities, positioning them as high-quality, high-performance circuit solutions.
As electronic technology continues to evolve and innovate, the colour-coded classification of circuit boards may yield further functionalities and application scenarios. Different coloured pcb boards will undergo ongoing performance optimisation and expanded application domains in the future, unlocking greater possibilities for the electronics industry.
