Structure for easily enabling screw holes on PCB to be grounded

A PCB board, screw hole technology, applied in the printed circuit grounding device, crosstalk/noise/electromagnetic interference reduction (, circuit device, etc., can solve the problem of uncontrollable grounding, regulating screw hole grounding, VIA hole control and other problems, to achieve the effect of convenient and reliable connection adjustment, satisfying electromagnetic compatibility, and reducing conducted noise

Inactive Publication Date: 2018-07-31
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the screw hole adopts a grounded screw hole or a floating ungrounded screw hole structure, but the reason why the existing technology cannot control whether it is grounded or not is because the conduction uses the VIA ground, and the VIA hole cannot be made through the PCB. The problem is that it is impossible to flexibly control the grounding of the screw holes on the PCB according to the needs.

Method used

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  • Structure for easily enabling screw holes on PCB to be grounded

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Embodiment Construction

[0019] In order to better understand the present invention, the implementation manner of the present invention will be explained in detail below in conjunction with the accompanying drawings. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0020] combine figure 1 , the invention discloses a structure that is convenient for adjusting whether the screw hole on the PCB is grounded, including a controllable upper key device 4, and a screw hole 2 and a VIA hole 3 arranged on the PCB 1, and the PCB is provided with a PCB grounding Wire, the PCB board grounding wire is connected with the metal case or shell of the server, and some of the VIA holes are arranged on the periphery of the screw hole, and the inner hole of the screw hole is provided with a metal coating 21, and the surface of the screw hole is surrounded on the PCB board. A metal foil 5 is provided, one end of...

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Abstract

The invention discloses a structure for easily enabling screw holes on a PCB to be grounded. The structure comprises a controllable upper key device, and screw holes and VIA holes disposed on the PCB.The PCB is provided with a PCB grounding line connected to the metal chassis or casing of a server. The VIA holes are disposed at the periphery of the screw holes. The inner holes of the screw holesare provided with metal coatings. The surface of the PCB surrounding the screw holes is provided with a metal foil. One end of the metal foil is connected to the metal coating, and the other end of the metal foil is connected to one end of the controllable upper key device. The other end of the controllable upper key device is connected to the VIA holes. The structure, by using a short-circuit device, performs artificial selection control to determine whether conduct the screw holes on the PCB and the PCB ground, and can flexibly control the grounding of the screw holes on the PCB, and can conveniently control the conduction of the PCB and the chassis according to actual test conditions such that a product can meet EMC testing requirements.

Description

technical field [0001] The invention relates to the technical field of PCB grounding components, in particular to a structure for conveniently adjusting whether a screw hole on a PCB is grounded. Background technique [0002] With the advent of the era of big data, the development of server products has risen rapidly. In the design of server products, due to the complexity and diversity of circuits, it is becoming more and more difficult to meet electromagnetic compatibility. In the design of some chips, due to the chip itself The conduction noise is very high. Instead, the nearest screw hole needs to be disconnected from the GND of the PCB board, that is, it is not connected to the ground of the PCB on the motherboard. Therefore, it is necessary to adopt a structure that can artificially control the conduction of the screw hole on the motherboard. method. [0003] In the PCB design, copper is laid on the surface of the screw hole, and then connected to the internal GND thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/02
CPCH05K1/0215
Inventor 李军阳
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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