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Edge fingers of multi-layer printed circuit board

A multi-layer printing and circuit board technology, applied to printed circuits, printed circuits, printed circuit components, etc., can solve problems such as impedance mismatch and signal quality degradation

Active Publication Date: 2017-05-17
CLOUD LIGHT TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the known prior art, there is an impedance mismatch between the PCB transmission line, especially the golden finger area, and the socket connector
Degraded signal quality as a result

Method used

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  • Edge fingers of multi-layer printed circuit board
  • Edge fingers of multi-layer printed circuit board
  • Edge fingers of multi-layer printed circuit board

Examples

Experimental program
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Effect test

Embodiment Construction

[0037]Reference is now made in detail to the preferred embodiment of an edge finger for a multilayer printed circuit board, examples of which are also provided in the following description. Although an exemplary embodiment of an edge finger for a multilayer printed circuit board has been described in detail, it will be apparent to those skilled in the art that certain features have not been shown for the sake of clarity because it is not necessary to understand the multilayer printed circuit board Not very important for fringe fingers.

[0038] In addition, it should be understood that the edge fingers of the multilayer printed circuit board are not limited to the specific embodiments described below, and various changes and modifications can be made by those skilled in the art without departing from the spirit or scope of the present invention. For example, elements and / or features of different exemplary embodiments may be combined with each other and / or substituted for each ...

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PUM

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Abstract

A multi-layer printed circuit board includes an insertion end, two edge fingers provided on the insertion end, two chamfers formed at two opposite inner corners at two trailing edges of the two edge fingers, and two single-ended transmission lines extending from the two trailing edges of the two edge fingers and converging towards each other to form a differential pair. A first ground reference plane is disposed underneath the two single-ended transmission lines and the differential pair with a leading edge terminates at the trailing edges of the two edge fingers and a first cut-out portion formed at the leading edge. Other ground reference planes are disposed underneath the first ground reference plane with leading edges terminate at the trailing edges of the edge fingers and second cut-out portions are formed at the leading edges, wherein the second cut-out portions are larger than the first cut-out portion.

Description

technical field [0001] This application relates to edge fingers of multilayer printed circuit boards. Background technique [0002] Edge fingers are conductive fingers formed on one or both sides of an edge portion of a multilayer printed circuit board. The printed circuit board can be plugged into a socket connector provided on an electronic device such as a computer. Receptacle connectors typically have resiliently deflectable metal contact blades positioned and configured to engage edge fingers on the printed circuit board to electrically couple the circuitry of the printed circuit board to the electronic device. Ideally, the impedance characteristics of the receptacle connector should be the same as, or very close to, the impedance characteristics of the printed circuit board (PCB) transmission line and the connected components. However, in the known prior art, there is an impedance mismatch between the PCB transmission line, especially the golden finger area, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/11
CPCH05K1/117H05K2201/09409H05K1/0225H05K1/0253H01R12/00H05K1/0245H05K1/0216H01R12/52H05K1/0219H05K1/0298
Inventor 林福明
Owner CLOUD LIGHT TECH LTD
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