Circuit board wiring method, system and device

Abstract

The invention discloses a circuit board wiring method. The method comprises the following steps: acquiring wiring information of a circuit board; determining target routing information which does not meet the impedance requirement from the routing information; and adding a conductor medium on the target wire corresponding to the target wire information, so that the impedance of the target wire meets the impedance requirement. According to the invention, the wiring width is compensated by adding the conductor medium on the target wiring which does not meet the impedance requirement, so that the impedance of the wiring in the wiring area is reduced, the impedance continuity of the whole wiring is ensured, and the signal quality is improved. The invention further discloses a circuit board wiring system and device which have the same beneficial effects as the circuit board wiring method.

Description

technical field [0001] The invention relates to the field of circuit board design, in particular to a circuit board wiring method, system and device. Background technique [0002] As devices are upgraded, the pitch between their pins is getting smaller and smaller. At present, when wiring these fine-pitch devices on a circuit board, the area just out of the fine-pitch device is usually reduced (referring to: starting from the pads on the circuit board that are connected to the device pins one by one, starting from the pads on the circuit board, starting from the soldering pads The traces at the disk start to the preset distance from the edge of the device (usually 1mm to 3mm, other values ​​can also be used, depending on the device pin spacing, usually the smaller the device pin spacing, the larger the preset distance value). ), the area where this part of the trace is located is called the trace line width of the just-exit area) to meet the requirements of production and p...

AI Technical Summary

Problems solved by technology

However, the impedance of the trace is inversely proportional to the line width. When the trace width decreases, the impedance of this part of the trace will increase, resulting in discontinuous impedance on the entire trace.

In the same trace, the energy is conserved, the voltage and current will not change, and when the impedance is discontinuous, the energy will be reflected during the transmission process, part of the energy will return to the input terminal and overlap with the signal at the input terminal for retransmission, and the other part will be transmitted to the input terminal. At the output end, continue to shunt at the output end, part of the output is returned to the input end, and the output end and the input end of this section of the line oscillate back and forth to achieve balance, resulting in incomplete signal transmission and affecting the quality of the signal

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