PCB circuit board is one of the most important components in the electronics industry. Almost every electronic device needs to be used. The design can not only directly affect the quality of the whole electronic products, but also closely related to the cost, and even the success or failure of commercial competition. It is not easy to say simple, but it is not difficult to say difficult, just walk to these steps, can easily complete PCB circuit board design.

1. Pay attention to the relationship between the hole, the welding disc, the walking line and the golden finger.

When wiring hole with solder, on line, gold finger cannot too close, the through hole of the same property shall be the gold finger to keep a distance of 0.12 mm at least, different properties via should be far away from the welding plate with gold finger. The hole should be minimum of 0.35mm inner hole 0.2mm.

2. Pay attention to the distance between the welding disc and the original.

The distance between SMT solder and DIE bonding pad and SMT element shall be more than 0.3mm. The distance between one DIE bonding pad and the other DIE should also be kept above 0.2mm. The signal line is 2MILS with a spacing of 2MILS, and the main power supply line is 6-8mils to enhance the strength of the substrate.

3. Pay attention to the size and spacing of the pads.

The minimum size of the bonding pad (single thread) is 0.2mmx0.09 mm90 degree, and the spacing of each welding plate is as low as 2MILS, and the width of the inner row and the power cable is also required to be 0.2mm. At the same time, the Angle of the bonding pad should be adjusted according to the Angle of the element drawing.

4. Pay attention to the production process of the substrate.

Each line must be by electroplating line will use the technique of plating copper casting and forming welding plate and walk the line, even without welding plate network, must be in a certain mode the solder copper plating, otherwise will be the result of the bonding pad without copper.