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Double-layer metal mesh etched by femtosecond laser for high-performance electromagnetic interference shielding window

机译：用于高性能电磁干扰屏蔽窗口的飞秒激光蚀刻双层金属网

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摘要

An excellent transparent electromagnetic interference (EMI) shielding window is proposed and demonstrated theoretically and experimentally. The window is composed of double layers of Au-Ni composite mesh, separated by the quartz-glass substrate. The simulation exhibits that the shielding effectiveness (SE) of the double-layer mesh can be improved by increasing the thickness of the substrate in the low frequency range far below the first interfere valley. The measured SE of the proposed structure reaches over 37.61 dB covering an ultra-wide frequency ranging from 150 MHz to 5 GHz, with a maximal SE of 75.84 dB at 3.58 GHz, while the average optical transmittance of the double-layer mesh maintains similar to 76.35% at 400-900 nm. Moreover, femtosecond laser direct writing processing technology is used to manufacture the double-layer metal grids, the fabricated grids are not easy to be scuffed off and has a longer operating life. Such a high-performance EMI shielding window has great potential applications in precision optical monitoring instrument and military devices.
机译：理论上和实验提出和演示了优异的透明电磁干扰（EMI）屏蔽窗口。该窗口由双层Au-Ni复合网格组成，由石英玻璃基板分开。通过将基板的厚度增加在远低于第一间隔谷以下的低频范围内，模拟表现出双层网格的屏蔽效能（SE）。所提出的结构的测量SE达到超过37.61dB，覆盖从150MHz至5GHz的超宽频率，最大SE为3.58 GHz，而双层网格的平均光学透射率为类似于76.35％在400-900 nm。此外，Femtosecond激光直接写入处理技术用于制造双层金属栅格，制造的网格不易磨损，并且具有较长的操作寿命。这种高性能EMI屏蔽窗口在精密光学监测仪器和军用设备中具有很大的潜在应用。

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  • 来源
    《RSC Advances》 |2019年第39期|共6页
  • 作者

    Zhang Yaqiang; Dong Hongxing; Li Qisong; Mou Nanli; Chen Lulu; Zhang Long;

  • 作者单位

    Chinese Acad Sci Shanghai Inst Opt &

    Fine Mech Key Lab Mat High Power Laser Shanghai 201800 Peoples R China;

    Chinese Acad Sci Shanghai Inst Opt &

    Fine Mech Key Lab Mat High Power Laser Shanghai 201800 Peoples R China;

    Chinese Acad Sci Shanghai Inst Opt &

    Fine Mech Key Lab Mat High Power Laser Shanghai 201800 Peoples R China;

    Chinese Acad Sci Shanghai Inst Opt &

    Fine Mech Key Lab Mat High Power Laser Shanghai 201800 Peoples R China;

    Chinese Acad Sci Shanghai Inst Opt &

    Fine Mech Key Lab Mat High Power Laser Shanghai 201800 Peoples R China;

    Chinese Acad Sci Shanghai Inst Opt &

    Fine Mech Key Lab Mat High Power Laser Shanghai 201800 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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