PCB routing principles
In the PCB design, the wiring is an important step to complete the product design, it can be said that the preparatory work is done for it, in the PCB, the wiring design process to limit the highest, the finest techniques, the largest workload. PCB wiring with single-sided wiring, double-sided wiring and multi-layer wiring. There are two ways of cabling: automatic routing and interactive wiring, in the automatic routing, you can use the interactive pre-string on the requirements of more stringent wiring, the input and output side of the line should avoid adjacent parallel, in order to avoid reflection interference. If necessary, should be added to ground isolation, two adjacent layers of wiring to each other perpendicular to the parallel prone to parasitic coupling.
The wiring rate of the automatic wiring depends on the good layout, and the wiring rules can be set in advance, including the number of times of alignment, the number of vias, the number of steps, and the like. Generally first to explore the type of cloth warp, quickly connected to the short-term, and then maze-type wiring, the first cloth to the wiring of the overall routing optimization, it can be broken according to the need to have cloth line. And try to re-wiring to improve the overall effect.
The current high-density PCB design has felt that the through-hole is not well adapted, it wastes a lot of valuable wiring channels, in order to solve this contradiction, the emergence of blind hole and buried hole technology, it not only completed the role of vias , But also save a lot of wiring channel to make the wiring process is more convenient, more fluid, more perfect, PCB board design process is a complex and simple process, in order to master it, need the majority of electronic engineering design Personnel to their own experience, in order to get the true meaning of which.