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首页> 外文期刊>RSC Advances >Double-layer metal mesh etched by femtosecond laser for high-performance electromagnetic interference shielding window
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Double-layer metal mesh etched by femtosecond laser for high-performance electromagnetic interference shielding window

机译：飞秒激光刻蚀的双层金属网具有高性能的电磁干扰屏蔽窗

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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 ～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：提出了一种优良的透明电磁干扰屏蔽窗，并在理论和实验上进行了证明。该窗口由双层的Au-Ni复合筛网组成，并被石英玻璃基底隔开。仿真表明，可以通过在远低于第一干扰谷的低频范围内增加基板厚度来提高双层网的屏蔽效果（SE）。所提议结构的实测SE超过37.61 dB，覆盖从150 MHz到5 GHz的超宽频率，在3.58 GHz时最大SE为75.84 dB，而双层网的平均透光率保持〜76.35 ％在400–900 nm下。此外，飞秒激光直接写入处理技术被用于制造双层金属栅格，所制造的栅格不易被刮掉，并且使用寿命更长。这种高性能的EMI屏蔽窗在精密光学监视仪器和军事设备中具有巨大的潜在应用。

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