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Abstract

This report summarizes the electroless plating process of magnetic nickel and noncrystalline nickel for aluminium honeycomb shielded vent windows. The test results showed that the electroless nickel plating is bright in appearance, even in thickness, excellent in adhesion with aluminium substrate, good in conductivity, magnetism and corrosion resistance. Shielding efficiency obtained was 67~78 dB under 4 GHz~12 GHz frequency. Environmental reliability tests were made for 56 days under two environmental conditions, that is at 85 ℃ and 35 ℃, 95% relative humidity. The EMI shielding technical requirements of the electroless double nickel plating for aluminium honeycomb shielded vent windows of electric appliances, wave guides and shielded rooms have been met in practical use.

Keywords

Electromagnetic shielding, Shielding coating, Electroless nickel, Aluminium honeycomb, Electroless plating, Shielded window, Shield

Publication Date

1996-05-28

Online Available Date

1996-05-28

Revised Date

1996-05-28

Received Date

1996-05-28

References

1GJB151-86军用设备和分系统电磁发射和敏感度要求.国防技术工业委员会,1986-06-20发布2CHO-CELLshieldedventpanels.EMIshieldingEngineeringHandbook,1989/90,983KrulikGA,WaggonerJ.PerformanceofelectrolessdepositsforEMI/RFIshieldingapplications.Amer-icanElectroplaters′Society,70thAnnualTechnicalConference,June27~301983,SessionH-Electrolessplating1~84ArcilesiDAetc.AdvancesinplatingtechnologyforEMIshielding.ProductsFinishing,1984,March54~595HajduJ,KrulikGA.Comparisonofeletrolessdepositsforelectromagneticshielding.PlatingandSur-faceFinishing,1983,70(7):42~446McwiliamA.Electrolessplating-efectiveEMIshielding.ProductFinishing,1988November14~157汪荣华.屏蔽EMI/RFI的化学镀层.材料保护,1991,24(9):8~128汪荣华.耐磨、耐蚀功能性化学镀镍工艺研究.航天科技报告,航天工业总公司,航天科技报告一院编辑部94-1-20

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