What problems will you encounter when designing circuit board samples? The following is a summary of ten common problems encountered in PCB sample design.

　　1、 Overlap of pads

　　Overlapping solder pads means overlapping holes. During the drilling process, multiple drilling at one location can cause damage to the holes and result in scrapping.

　　2、 Graphic layer abuse

　　Specific performance: Some useless connections were made on some graphics layers, and originally a four layer board was designed with circuits above five layers, which caused misunderstandings; Violation of conventional design, such as component surface design at the Bottom layer and welding surface design at the Top, causing inconvenience, etc. Therefore, maintaining the integrity and clarity of the graphic layer during design.

　　3、 Character shuffling

　　Specifically, the character cover solder pad SMD solder pad brings inconvenience to the on/off testing of circuit boards and the welding of components; Also, the character design is too small, which makes screen printing difficult; Too much overlap makes characters difficult to distinguish.

　　4、 Single sided pad aperture setting

　　Single sided pads generally do not require drilling, and if drilling is required, the hole diameter should be designed to be zero. If numerical values are designed, the coordinates of the hole will appear at this location when generating drilling data, leading to problems.

　　5、 Draw solder pads with filler blocks

　　DRC inspection can be passed during circuit design, but it is not feasible for processing. When applying solder mask, the filling block area will be covered by solder mask, causing difficulty in device soldering.