本研究目的係以碳纖維（Carbon Fiber）為基材，編織成具有導電特性的碳纖維複合材料，根據ASTM D4935-89規範，進行材料的電磁屏蔽效率（Shielding Effectiveness）之量測。本研究主題共分為三部分。

第一部份，碳纖維依不同織法有「平織」（Plain Weave）、「斜織」（Balanced Twill Weave）和「單一方向」（Uni-direction）等三種試片之區別。實驗結果顯示，對300 KHz至3 GHz範圍的電磁波，單層「平織」碳纖維織布平均可達50 dB屏蔽效率，雙層試片之組合，更可達70 dB以上。至於「單一方向」試片，屏蔽效率隨電磁波頻率的提高而降低，單層僅有10 dB，雙層試片、碳纖維排列夾角0度時，屏蔽值幾乎維持不變。但逐漸增加上、下層碳纖維排列夾角，試片的屏蔽效率也慢慢提高，對頻率2.5 GHz的電磁波，已達45 dB，可符合工業界40 dB的要求。

第二部分，為降低成本，減少碳材使用量係最直接方式。將「平織」及「斜織」的碳纖維織布製作成具有孔隙的網狀結構（Mesh Structure），有2mm x 2mm與4mm x 4mm的孔隙大小，相較於未加工前的「平織」試片，單層的碳纖維用量降低一半，對高頻電磁波的屏蔽效率也降至30 dB左右，但1 GHz以下電磁波，仍有40 dB的效果。本研究將討論層數、孔隙大小及層與層間碳纖維排列夾角之變化，對電磁屏蔽效率的影響。

第三部分，改良「單一方向」碳纖維試片，將碳纖維束沿單一方向間隔排列，間隔距離有1、2、3、4和5 mm，以改變等面積下碳纖維重量密度。配合層數及不同碳纖維排列夾角等參數，進行電磁屏蔽效率的量測與分析，最後的實驗數據將可提供作為碳纖維電磁屏蔽複合材料的設計參考。

本研究結果證實，碳纖維密度、層與層間的碳纖維排列角度、試片厚度（層數）等，皆會影響屏蔽效率，本文同時以等效電路模型討論碳纖維試片的屏蔽效率，並分析其電磁屏蔽物理機制。

We study a novel structure employing the woven continuous carbon fiber (CCF) epoxy composite with high electromagnetic (EM) shielding. The influences of wove type, number and angle of overlapped plates upon the shielding effectiveness (SE) of wove CCF epoxy composite are investigated. The minimum SE of the single, double, and triple plain or balanced twill woven CCF composite plates were measured to be as high as 50 dB, 60 dB, and 70 dB, respectively. More than 100 dB of SE was obtained for the triple overlapped plain wove CCF composite at frequency of 0.9 GHz. The weight percentage of single CCF composite plate required for electronic application was 4.8% only, which was less than one quarter of the carbon fiber (CF) content and the performance of SE was 10 dB higher in comparison with long CF filled liquid crystal polymer composites. The SE calculated theoretically is consistent with that measured by the experiment.
We have demonstrated a new woven CCF epoxy composite with high EM shielding. This work may lead to the development of effective shielding for plastic optical transceiver modules to prevent electromagnetic interference (EMI) for use in low cost and lightwave communication systems.

中文摘要 I
英文摘要 III
致謝 IV
內容目錄 VI
圖表目錄 VIII

第一章 導論 1
1.1研究目的 1
1.2 論文架構 3

第二章 文獻回顧與電磁屏蔽理論基礎 4
2.1 碳元素的基本特性 4
2.2 碳纖維的優點 7
2.3電磁屏蔽材料之應用與研究 8
2.3.1 添加碳纖維之複合材料 9
2.3.2 金屬化織物 10
2.4 奈米碳管 13
2.4.1奈米碳管的電性 14
2.4.2奈米碳管的機械性質 15
2.5 電磁波的屏蔽理論 19

第三章 碳纖維布製作與電磁屏蔽效率之量測 22
3.1 碳纖維布的製程、織法與試片排列組合 22
3.1.1 碳纖維布的製程 23
3.1.2 編織方法 24
3.1.3 碳纖維試片排列組合 26
3.2表面電阻值量測 34
3.3電磁屏蔽效率量測 37
3.3.1 量測架構 37
3.3.2 量測系統與方法 38
3.4以等效電路模型探討電磁屏蔽效率量測系統 43

第四章 實驗結果的分析與討論 47
4.1平織、斜織與單一方向排列之碳纖維布 47
4.2具孔隙之網狀結構（Mesh structure）碳纖維布 54
4.3間隔排列之「單一方向」碳纖維試片 59
4.4等效電路模型與導電性網狀結構材料之理論電磁屏蔽效果 73
4.4.1 等效電路模型 73
4.4.2 金屬網狀結構材料理論電磁屏蔽效率 76

第五章 結論 80
參考文獻 82
附錄一 85

[1]W. H. Cheng, J. Y. Cheng, T. L. Wu, C. M. Wang, S. C. Wang, and W. S.Jou,“Electromagnetic shielding of plastic packaging in low-cost laser
modules,”Electronics Letters,Vol.36,No.2, pp118-119,(2000)

[2]W. S. Jou, T. L. Wu, S. K. Chiu, and W. H. Cheng,“Electromagnetic Shielding of Nylon-66 Composites Applied to Laser Modules,” IEEE/TMS
Journal of Electronic Materials, Vol. 30, No. 10, pp1287-1293,(2001)

[3]T. L. Wu, S. G. Dai, P. L. Li, W. S. Jou, and W. H. Cheng,“Effect of Carbon-fiber Orientation on the Shielding for the Plastic Optical Laser
Module Packages,” accepted for presentation in 2002 Electronic Components & Technology Conference (2002 ECTC), San Diego, California USA, May 28–31,(2002)

[4]R.Smalley,Department of Chemistry,Texas, (2002)

[5]W. D. Kingery et al.,“Introduction to ceramics”,2nd ED.,J. Wiley,(1976)

[6]許明發,“碳、碳纖維、碳/碳複合材料之加工技術及應用”,滄海書局,(86年5月)

[7]C. E. Mortimer,“Mortimer’s Chemistry”,譯述者：吳惠平, 科技圖書股份有限公司, 第九章，分子幾何學、分子軌域, (2001)

[8]邱首凱,“塑膠複合材料電磁屏蔽效應之研究”,國立中山大學碩士, (2001)

[9]戴傳家,“雷射收發模組電磁屏蔽之研究”,國立中山大學碩士, (2002)

[10]Jean-Baptiste Donnet & Roop Chand Bansal, “Carbon fiber”,Second Edition,Revised and Expanded, international fiber science and technology,chap6,p.315,(1990)

[11]Leighton H. Peebles,“Carbon Fibers, formation, structure, and properties”,p.46, (1994)

[12]Xiangcheng Luo, D.D.L. Chung,“Electromagnetic interference shielding
using continuous carbon-fiber carbon-matrix and polymer-matrix composites”,Composites: Part B 30,pp227-231,(1999)

[13]D.D.L.Chung,“Electromagnetic interference shielding effectiveness of carbon materials”, Carbon 39, pp279-285, (2001)

[14]DONALD M. BIGG,“Conductive Polymeric Compositions”,Polymer Engineering and science, December, Vol. 17, No 12, (1977)

[15]許謦顯,“PAN系碳纖維的電性與磁性分析及遮蔽材的研究”,逢甲大學材料科學學系,(2000)

[16]林紀宏,“金屬化織物之介紹”,中國紡織工業研究中心

[17]鄭國彬、李梅蘭,“導電性纖維製品的製作方法”, 第28期, 專業新知

[18]Peter J. F. Harris,“Carbon Nanotubes and Related Structures”, Cambridge University Press, Chapter 4.2: Electronic properties of nanotube,(1999)

[19]Thomas W. Ebbesen,“Carbon Nanotube”,(1997)

[20]G Dresselhaus & M S Dresselhaus,“Physical Properties of Carbon Nanotube”,(1998)

[21]M. S. Dresselhaus, G. Dresselhaus and R. Saito,“ Physics of Carbon Nanotube”,Carbon, Vol.33,No.7,pp883-891,(1995)

[22]“奈米科技專刊”,工研院化工所與化工資訊月刊出版,pp43-85,(2002)

[23]Donald R.J. White and Michel Mardiguian, “Electromagnetic Shielding”,A handbook series on electromagnetic interference and compatibility,Vol.3,chapter 2,6and7,(1988)

[24]Clayton R. Paul,“Introduction to Electromagnetic Compatibility”, Wiley series in Microwave and Optical Engineering,pp632-648

[25]David K. Cheng. “Field and Wave Electromagnetic”, Reading , Mass. Addison Wesley, pp198-219,(1989)

[26]譯者：葉中雄、曾衍彰、蔡文發,“電磁干擾與防護”, 徐氏基金會出版, (1998)

[27]Ferry F. Wilson, Mark T. MA, J. W. Adams, “Techniques for measuring the electromagnetic shielding effectiveness of materials. I. Far-field source simulation”, IEEE Transactions on Electromagnetic compatibility, Vol.30,No.3,pp239-250, (1988)

[28]American Society for Testing and Materials," Annual book of ASTM standards. section 14 : General methods and instrumentation", Philadelphia, Pa. : American Society for Testing and Materials, c1997,ASTM D4935-89, pp442-P450, (1997)

[29]KENDALL.F CASEY,“Electromagnetic Shielding Behavior of Wire –Mesh Screens”, IEEE transactions of electromagnetic compatibility, Vol. 30, No 3,pp298-306,(1988)