Keep the cost of the PCB as low as possible

In order to keep the cost of the PCB as low as possible, there are many factors that must be taken into account. 

On the other hand, if the parts on the board are dense, then the wiring must be finer, and the equipment used must be relatively higher-grade. The materials used must also be more advanced, and more care must be taken in the wire design to avoid power consumption and other problems that can affect the circuit board function. The cost of these problems can be more than the savings from reducing the size of the PCB. 

3. The more layers the higher the cost, but fewer layers of PCBs usually result in an increase in size. 

4. Drilling holes takes time, so the fewer though holes, the better.

5. Buried holes are much more expensive than holes through all layers. This is because buried holes must be drilled before laminates can be compressed. 

6. The size of the holes in the board is determined by the diameter of the part pins. If the board has parts with different types of pins, then because the machine cannot use the same drill bits to drill all the holes, it is relatively time consuming and means that the manufacturing cost is relatively higher. 

7. Electronic testing using flying probe method, usually more expensive than the optical method. Generally speaking, optical testing is sufficient to ensure that there are no errors on the simple single side/ double side PCB. 

In short, manufacturers' working on the equipment is also becoming more sophisticated. Understanding the PCB manufacturing process is useful, because when we compare the motherboard, the same performance of the board cost may be different, stability also varies, which also allows us to compare the capabilities of each manufacturer. 

A good engineer can know the quality of the design just by looking at the motherboard design. You may not think you are that strong, but the next time you get a motherboard or graphics card, you may want to appreciate the beauty of PCB design first!