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For experienced engineers, the PCB board design is very simple, and all kinds of matters needing attention and operation skills are all at your fingertips and very skilled. For new engineers, circuit board design skills are difficult. After all, their proficiency is not enough, and there will be problems in design. Therefore, it is very necessary to understand the circuit board design. So, what are the circuit board design skills?
What are the precautions and operation skills in circuit board design
Skill 1: The definition of processing level should be clear
When there is an unclear place in the file, be sure to ask an engineer to check it, which can reduce the chance of plate making errors. Not only that, when designing single-sided circuit boards, pay attention to special instructions. If there are no special instructions, such as front and back, the designed circuit boards may not be welded, so pay attention.
Tip 2: The copper foil should not be too close to the outer frame
According to the experience of engineers, the distance between the large-area copper foil and the outer frame should be kept at least 0.2 mm, so special attention should be paid during operation. If this distance is less than 0.2mm, there is a risk of the solder resist peeling off.
Tip 3: Can't use padding to draw pads
Many novices will ignore this technique because drawing pads with filler blocks is possible in circuit board design and can pass DRC inspection, but it cannot be used during processing, because such pads cannot directly generate solder masks. When a solder resist is applied, this area will be covered by the solder resist, making it very difficult to solder components.
Tip 4: The electrical ground cannot coexist with pads and wires
When some engineers are designing circuit boards, the electrical ground layer will appear to be a flower pad and a connection. This situation is wrong. Because the ground layer is not the same as the actual printed board image, they are the opposite, all the connections are barrier lines, and no gaps can be left, otherwise, it will easily lead to a short circuit of the power supply.
Tip 5: The pad should not be too short
If the pads of surface mount components are too short, it is easy for the test pins to be misplaced. Because the pads are too dense, the distance between the two feet is very small, and the pads are also very thin. When installing the test pins, it must be staggered up and down, otherwise, this situation will occur.
Tip 6: The pads cannot overlap
Overlapping pads can easily lead to scrap during the drilling process. Therefore, the pads must not overlap. The above are the six skills of circuit board design, which are skills that can only be mastered by skilled people. The technical content of these techniques is not too high, but it greatly affects the results of the circuit board design. Therefore, in the process of PCB board design, we must pay attention to these points, so as to achieve perfection.
