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Printed circuit board

A printed circuit board and transmission line electrical technology, applied in the direction of printed circuit components, etc., can solve problems affecting signal transmission quality, differential signal impedance discontinuity, etc., and achieve the effect of ensuring transmission quality

Inactive Publication Date: 2012-10-31
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, more uncoupled line segments will cause discontinuity in the differential signal impedance between each differential pair, affecting the transmission quality of the signal

Method used

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  • Printed circuit board
  • Printed circuit board
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Examples

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Embodiment Construction

[0014] see figure 1 and figure 2 , is the printed circuit board 100 according to the first embodiment of the present invention. The printed circuit board 100 includes a first signal layer 10, a first reference layer 20, a second signal layer 30, a third signal layer 40, a second reference layer 50 and a bottom layer stacked in sequence from top to bottom. 60.

[0015] Please combine image 3 and Figure 4 , the first signal layer 10 includes a wiring layer 12 and a connection layer 14 opposite to the wiring layer 12 . A first differential pair 16 is arranged on the wiring layer 12 in an edge-coupling manner. The first differential pair 16 includes a first differential transmission line 162 and a second differential transmission line 164 . The first differential transmission line 162 is adjacent to and coupled to the second differential transmission line 164 in parallel. The first differential transmission line 162 includes a first connection end 162a. The second diffe...

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Abstract

The invention relates to a printed circuit board, which comprises a first signal layer, a first reference layer, a second signal layer and a third signal layer which are stacked sequentially, wherein a first differential couple is arranged on the first signal layer in an edge coupling manner, and comprises a first differential transmission line and a second differential transmission line which are adjacent to each other; a second differential couple is arranged in the second and the third signal layers in a broadside coupling manner, and comprises a third differential transmission line arranged in the second signal layer and a fourth differential transmission line arranged in the third signal layer; the first differential transmission line is electrically connected with the third differential transmission line through a first inclined through hole; and the second differential transmission line is electrically connected with the fourth differential transmission line through a second inclined through hole.

Description

technical field [0001] The invention relates to a printed circuit board, in particular to a printed circuit board capable of maintaining the impedance consistency of differential signals. Background technique [0002] In today's multilayer printed circuit boards, differential pairs on inner layers are often used to transmit signals. Differential pairs in traditional printed circuit boards are mostly laid out in an edge-coupled manner, which means that two differential transmission lines of a differential pair are coupled to each other in the same signal layer of the printed circuit board. Of course, the differential pairs of the printed circuit board are occasionally laid out in the way of broadside coupling (broadside-couple). Coupling between layers. If the differential pairs in the printed circuit board need to mix edge coupling and broadside coupling, the layout designer will generally add an uncoupled line segment to each transmission line and use vertical vias to ach...

Claims

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Application Information

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IPC IPC(8): H05K1/02
Inventor 陈永杰许寿国梁献全严欣亭吴丹辰
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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