• Title/Summary/Keyword: powder metal

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Preparation of EMI Shielding Sheet by PVD Method and Its Characteristic of EMI Shielding Efficiency (PVD법을 이용한 전자파 차폐용 시트 제조 및 차폐효율 특성)

  • Chae, Seong-Jeong;Hong, Byung-Pyo;Lee, Byoung-Soo;Byun, Hong-Sik
    • Applied Chemistry for Engineering
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    • v.21 no.5
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    • pp.527-531
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    • 2010

  • The optimized sheet for EMI shielding was prepared by metal power with Fe series. Then various metal powders were deposited on the sheet by PVD method. Moreover, the PVdF nanofiber membrane was used to compare the characteristic of EMI shielding efficiency of various metal powders. The electrical property was measured by the 4-point probe method. The result from EDS confirmed that the metal powder existed on the sheet. EMI shielding efficiency was analysed by EMI shielding measurement apparatus. The lowest electrical resistance, $641.95{\Omega}{wcdot}cm$, was obtained with $1000\;{\AA}$ deposition of Cu on the sheet. It was revealed that the EMI shielding efficiency increased with increase of the metal deposition thickness. The sheet deposited by Cu with $1000\;{\AA}$ showed the highest EMI shielding efficiency, 32.5 dB.

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