What problems will you encounter when designing the circuit board? The following summarizes ten problems that are easy to encounter in the circuit board proofing design.
1. Pad overlap
The overlap of the pads means the overlap of the holes. In the drilling process, the holes will be damaged due to multiple drilling in one place, resulting in scrapping.
2. Graphics layer abuse
Specific performance: Some useless connections were made on some graphics layers. The original four-layer board was designed with more than five layers of circuits, which caused misunderstanding; violation of conventional design, such as the component surface design on the bottom layer and the welding surface design In Top, it causes inconvenience and so on, so the graphic layer is kept intact and clear when designing.
3. Random characters
Specific performance: SMD solder pads for the character cover pads bring inconvenience to the on-off test of the circuit board and the soldering of the components; the character design is too small, which makes screen printing difficult; too large will make the characters overlap and make it difficult to distinguish.
4. single-sided pad aperture setting
Single-sided pads are generally not drilled. If the drilled holes need to be marked, the hole diameter should be designed to be zero. If the numerical value is designed, then when the drilling data is generated, the coordinates of the hole appear at this position, and there is a problem.
5. use filler blocks to draw pads
When designing the circuit, it can pass the DRC inspection, but it is not good for processing. When the solder resist is applied, the area of the filler block will be covered by the solder resist, which makes it difficult to solder the device.
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