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Korean Journal of Metals and Materials > Volume 55(8); 2017 > Article
Korean Journal of Metals and Materials 2017;55(8): 576-580. doi: https://doi.org/10.3365/KJMM.2017.55.8.576
스크린 인쇄공정으로 제조한 그리드 전도막의 전자기 노이즈 흡수특성
김민성, 김성수
충북대학교 신소재공학과
Electromagnetic Noise Absorption by Conductive Grid Films Prepared by Screen Printing Process
Min-Sung Kim, Sung-Soo Kim
Department of Advanced Materials Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
Correspondence  Sung-Soo Kim ,Tel: +82-43-261-2418, Email: sskim@cbnu.ac.kr
Received: 30 March 2017;  Accepted: 28 April 2017.  Published online: 1 August 2017.
ABSTRACT
To realize focused design near-field conduction noise absorbers for sub-GHz frequencies, this study proposes screen-printed conductive grid films. The films’ advantages include large-scale production and easy control of electrical properties. A conductive grid film with a resistance value of approximately 70 Ω was screen printed on polyimide film substrate and its conduction noise absorption was evaluated using a microstrip line. High power absorption was experimentally verified at low frequencies below 1 GHz by varying the grid width (w). The dominant loss mechanism was ohmic loss. Approximately 85% power absorption was obtained at 0.5 GHz for a grid film of w = 1.5 mm. Compared with a conventional magnetic sheet absorber, the conductive grid film exhibited a superior power absorption particularly at sub-GHz frequencies, and at a much reduced thickness of approximately 20 μm.
Keywords: conductive grid films, screen printing, electromagnetic noise, absorbers, electric properties, magnetic properties.
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