Design method and system for reducing link loss of circuit board, and circuit board

Abstract

The invention discloses a design method and system for reducing link loss of a circuit board, and the circuit board. According to the method, a circuit board is divided into a first area for transmitting high-speed signals and a second area for transmitting non-high-speed signals; when the link of the first area is designed, low-roughness copper foil is adopted to design the link of the first area; and when the link of the second area is designed, the link of the second area is designed by adopting the copper foil with high roughness. According to the invention, the link loss is reduced by reducing the roughness of the copper foil of the link, so that the problems of cost increase caused by upgrading of the circuit board and insufficient wiring space caused by additional arrangement of thedriving chip are avoided; and only the copper foil roughness of the high-speed signal link with high link loss requirement is reduced, and the roughness of the copper foil of the non-high-speed signal link still maintains high roughness, so that the bonding degree of the copper foil and the interlayer dielectric of the circuit board is ensured on the basis of meeting the link loss requirement ofthe circuit board so as to prevent the problem of circuit board layering caused by insufficient bonding.

Description

technical field [0001] The invention relates to the field of circuit board design, in particular to a design method, system and circuit board for reducing circuit board link loss. Background technique [0002] In the process of link design on the circuit board, link loss is an important factor affecting link signal quality, so optimizing link loss is particularly important. At present, in the link design, there are two commonly used link loss reduction methods for the problem of excessive link loss: 1) Improve the board material grade of the circuit board to use the circuit board material with lower loss to reduce the link loss. loss. However, the cost of circuit boards with high board grades is relatively high, especially when only some links on the circuit board have high loss requirements, it is wasteful to upgrade the board for the entire circuit board. 2) Add a driver chip in the link to enhance the signal strength in the link to offset the loss of the signal in the l...

AI Technical Summary

Problems solved by technology

However, the driver chip also leads to an increase in the cost of the circuit board, especially when more links need to be added to the driver chip, the cost of the circuit board is significantly increased; in addition, the driver chip and its peripheral circuits need to occupy a certain amount of space on the circuit board, which not only increases the number of circuits Difficulty routing the board and is not conducive to board designs with small spaces

Images