Prepreg spliced by regional glass fiber cloth, PCB and splicing method

Abstract

The invention provides a prepreg spliced by regional glass fiber cloth. The prepreg is located between a first wiring layer and a second wiring layer adjacent to the first wiring layer and comprises first glass fiber cloth and second glass fiber cloth; the first glass fiber cloth is located in the area, where a high-speed signal line passes through, in the prepreg; the second glass fiber cloth is located in an area, where a low-speed signal line passes through, in the prepreg; the high-speed signal line is a high-speed signal wiring path which is in communication connection with the second wiring layer through a via hole in the first wiring layer; the low-speed signal line is a low-speed signal wiring path which is in communication connection with the second wiring layer through a via hole in the first wiring layer; the cost of the first glass fiber cloth is greater than the cost of the secondglass fiber cloth. The invention further provides a PCB and a prepreg splicing method. The problem that the production cost of prepregs is high in the prior art is effectively solved, the production cost of the prepreg is effectively reduced, meanwhile, the integrity of signals is considered, and the quality of products is guaranteed.

Description

technical field [0001] The invention relates to the field of prepreg design, in particular to a prepreg, a PCB board and a splicing method spliced ​​with glass fiber cloth in different regions. Background technique [0002] Prepreg (PP) is a sheet material made of glass fiber cloth (glass fiber cloth), impregnated with epoxy resin glue, and then heat-treated (dried). [0003] Such as figure 1 As shown, glass fiber cloth is divided into Standard, Expanded and Spread. The choice of glass fiber cloth and the corresponding glass fiber effect have a great influence on the integrity of high-speed signals. Generally, high-speed PCB boards use glass fiber cloth with low dielectric constant, such as flat cloth (glass fiber cloth that has been flattened). [0004] In the prior art, even if a certain wiring layer has different rate distributions (parts are high-speed wiring, other parts are low-speed wiring), in order to ensure the integrity of the signal and reduce the influence of ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention innovatively proposes a prepreg, PCB board, and splicing method for splicing glass fiber cloth in different regions, which effectively solves the problem of high production cost of the prepreg caused by the prior art, and effectively reduces the cost of the prepreg. Production cost, while taking into account the integrity of the signal, to ensure the quality of the product

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