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PCB Design
Let's look at the rules for checking PCB wiring design
03Dec
Jeff 0 Comments

Let's look at the rules for checking PCB wiring design

After the PCB board wiring design is completed, it is necessary to carefully check whether the wiring design conforms to the rules formulated by the PCB designer, and also to confirm whether the rules formulated conform to the requirements of the PCB board production process. Generally, the inspection includes the following aspects: (1) Line and line, line and element

After the PCB wiring design is completed, it is necessary to carefully check whether the wiring design conforms to the rules formulated by the designer, and also to confirm whether the rules formulated conform to the requirements of PCB production process. Generally, the inspection includes the following aspects:

pcba

(1) Whether the distance between line and line, line and component pad, line and through-hole, PCB component pad and through-hole, through-hole and through-hole is reasonable and meets Production requirements.

(2) Whether the width of the power line and the ground wire is appropriate, whether the power line and the ground wire are tightly coupLED (low wave impedance), and whether there is a place in the PCB board where the ground wire can be widened.

(3) Whether the best measures have been taken for the key signal lines, such as the shortest length, adding protective lines, and the input lines and output lines are obviously separated.

(4) Whether the analog circuit and digital circuit have their own independent ground wires.

(5) Whether the graphICs (such as icons and labels) added in the PCB will cause signal short circuit. Modify some undesirable alignments.

(6) Whether there is a process line on the PCB board, whether the resistance welding of the PCB meets the requirements of the production process, whether the resistance welding size is appropriate, and whether the character MARK is pressed on the device pad to avoid affecting the electrical installation quality.

(7) Whether the frame edge of the power supply layer in the multilayer PCB is shrunk, for example, if the copper foil of the PCB power supply layer is exposed outside the board, it is easy to cause a short circuit.

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