Why are most PCB boards green?
First of all, let's get to know this green board. A printed circuit board (PCB) is typically composed of pads, vias, solder mask layers, silk-screen layers, copper wires, and various components. Among them, the solder mask refers to the part of the printed circuit board that needs to be coated with green oil, In fact, solder mask ink is not limited to green. There are also red, yellow, blue, purple, black and so on, but green is the most common.
Why are most PCB boards green?
The function of the solder mask layer:
(1) Prevent physical disconnections in conductor circuits;
(2) In the welding process, prevent short circuits caused by bridging.
(3) Only weld the parts that must be welded to avoid waste of solder.
(4) Reduce copper contamination to the welding material through;
(5) Prevent insulation deterioration and corrosion caused by external environmental factors such as dust and moisture;
(6) It has high insulation, making it possible to achieve high-density circuits.
Why are most PCB boards green? The main reasons for this are as follows:
1. Green has less irritation to the eyes. good for the eyes, protects them, and relieves fatigue. Production and maintenance personnel are less likely to experience eye fatigue when working on PCB boards for extended periods, and the potential harm to their eyes is relatively small.
2. Low cost. As green is the mainstream in the production process, the purchase volume of natural green paint will be larger, and the purchase cost of green paint is relatively lower than that of other colors. At the same time, using the same color of paint in mass production can also reduce the cost of changing lines.
3. When the board is being SMT soldered, it needs to go through tinning, surface mount placement, and the final AOI verification. All these processes require optical positioning calibration. A green background color is better for the recognition effect of the instrument.
4. The delivery cycle of green oil solder mask is short, which is conducive to rapid production.
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