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Electromagnetic interference shielding device

A technology of electromagnetic radiation and conductive materials, applied in the direction of magnetic/electric field shielding, electrical components, gaskets/seals, etc.

Inactive Publication Date: 2011-04-20
VANGUARD PRODS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]3. Mandatory multi-step manufacturing
Unfortunately, the gussets themselves are also somewhat prone to damage and do not always provide the best support for the pressure load handling of the sealing gaskets

Method used

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  • Electromagnetic interference shielding device
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Embodiment Construction

[0028] refer to Figure 6-8 , according to the present invention, the sealing gasket is mainly made of easily compressible foam material or porous material 27, and there are conductive strips 30a, 30b, 30c and 30d in the middle. In view of the above-mentioned disadvantages of thermoplastic foams, the primary gasket material is preferably a non-conductive, heat-cured rubber, such as silicone elastomer, which has excellent resistance to compression hardening. Excellent resistance to compression hardening contributes to long-term performance, since most EMI gasket constructions rely on compressive loads for maximum performance. Suitable silicones include commercially available heat recoverable porous silicone elastomers such as C-1492 available from Wacker Chemie. The following are recipe instructions for using (-1492 gasket master material.

[0029] Wacker C-1492 97.5-99% by weight

[0030] Dicumy peroxide 1-2% by weight

[0031] Tert-butyl perbenzoate 0-0.5% by weight

[0...

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PUM

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Abstract

A gasket device for shielding electromagnetic radiation is comprised of several alternating areas of two different elastomeric materials, one of which is conductive. The areas of conductive material are substantially thinner than the other areas and provide a conductive path from one side of the gasket to the other.

Description

technical field [0001] Field of the Invention This invention relates generally to shielding electronic devices from electromagnetic interference, and more particularly to sealing gaskets which minimize the amount of conductive material required to provide an effective electromagnetic seal. Background technique [0002] A problem arises in the field of electromagnetic interference shielding, especially for the computer industry. refer to figure 1 , on the rear side of a typical personal computer or commercial small workbook 2 is a relatively large opening covered with a panel 4 for receiving necessary connections such as a mouse, keyboard, printer, telephone line, etc. Due to various openings and joints, energy can be radiated from the inside of the device to the surrounding environment. This panel poses additional problems for EMI shielding engineers. [0003] figure 2 is a top cut view of a typical computer back. A coupling plate 7 (usually light gauge stainless steel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
CPCH05K9/0015
Inventor 小R·C·本
Owner VANGUARD PRODS CORP