本論文目的為塑膠成型封裝雷射模組材料之電磁屏蔽研究。本實驗研究電木、耐龍、液晶高分子塑膠材料與鋁粉、鋁片、碳纖維、鋼絲等金屬填充物混合的製程，並對產生之導電性複合材料進行電磁屏蔽量測。製程上包括熱壓縮成形、雙螺桿混合、射出成形法。針對材料作金相分析，機械測試及屏蔽效率量測，並從屏蔽理論的觀點討論結果。實驗發現碳纖維混合塑膠材料，其在低頻30MHz所量測屏蔽效率達40dB，在1GHz所量測屏蔽效率可達60dB以上，屏蔽電磁波的效果良好。因此本研究的結論為碳纖維混合塑膠材料之塑膠成型封裝適合應用於低價位光電模組的選擇。

Electromagnetic shielding materials for plastic packaging in laser modules application were studied experimentally. Bipheny1, Nylon and LCP mixed with Al-powder, Al-flake, carbon-fibers and steel-fibers was fabricated and measured in shielding effectiveness(SE) for EMI. Compression molding, double-screw extrusion and injection molding were used for fabrication. We examed the mechanical properties and shielding effectiveness of these compounds. The SE of conductive plastics was measured to be 40dB at 30MHz and 60dB at 1GHz for carbon-fiber and plastic mixture. The experiment result indicates that introducting conductive carbon fiber fillers into plastics will produce conductive composites having an excellent SE to reduce EMI. With these excellent SEs, such conductive carbon fiber fillers into plastics are suitable for use in low-cost laser modules.

中文摘要 I
英文摘要 II
誌謝 III
內容目錄 IV
圖表目錄 VI
第一章 導論 1
1.1 研究目的 1
1.2 論文架構 2
第二章 電磁屏蔽的理論背景與架構 4
第三章 塑膠材料導電化之製程與材料特性分析 13
3.1 導電漆塗佈與金屬鍍膜 13
3.2 電木(聯二苯基)混合鋁粉與鋁片 14
3.3 耐龍混合碳纖維與鋼絲 14
3.4 LCP材料混合碳纖與鋼絲 15
3.5材料特性分析 17
第四章 屏蔽效率量測理論計算與結果 27
4.1 屏蔽效率量測理論計算 27
4.2 導電材料之量測結果與討論 29
第五章 結論與未來工作 38
參考資料 40

[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.2 118-119(2000).
[2] J.Y. Cheng, T.L. Wu, W.S. Jou, C.M. Wang, S.C. Wang, W.H. Cheng, "EMC99 Conference Records", 93-96(1999).
[3]David K. Cheng,"Field and wave electromagnetics". Reading, Mass.
Addison Wesley, c1983.
[4]Donald R.J.White and Michel Mardiguian,"Electromagnetic
Shielding". vol.3 Gainesville, Va. : Interference Control Technologies,
c1988.
[5]R.B.Schulz, V.C. Plantz, and D.R. Brush, "Shielding theory and
practice",IEEE Trans. on Electromagnetic Compatibility, EMC-30, 187-201(1988).
[6]Perry F. Wilson, Mark T. MA., J.W. Adams, "Techniques for Measuring the Electromagnetic Shielding Effectiveness of Materials: Part I: Far-Field Source Simulation", IEEE Tran. on EMC, Vol.30, No.3, 239-250(1988).
[7]Geoffrey Grimmett, "Percolation",Springer-Verlag, 1989
[8]Donald M. Bigg, "Conductive Polymeric Compositions", Polymer
Engineering and Science, Vol.17, No.12,.842-847(1977).
40
[9]R. D Sherman, L. M. Middleman, and S. M. Jacobs, "Electron
Transport Process in Conductor-Filled Polymers", Polymer
Engineering and Science, Vol.23, No.1, 37-45(1983).
[10]E. P. Mamunya, V.V. Davidenko and E.V. Lebedev, "Percolation Conductivity of Polymer Composites Filled With Dispersed Conductive Filler", Polymer Composites, Vol.16, No.4, 319-324(1995).
[11]Wang Guoquan and Zeng Peng, "Electrical Conductivity of Poly
Plastisol-Short Carbon Fiber Composite", Polymer Engineering and
Science, Vol.37, No.1, 96-100, (1997).
[12]Mark Weber and Musa R. Kamal, "Estimation of the Volume
Resistivity of Electrically Conductive Composites", Polymer
Composites, Vol.18, No.6, 711-740(1997).
[13]J. Brandrup, E. H. Immergut, "Polymer handbook ", Third Edition, Physical Constants of Various Polyamides,wiley, V/111(1989).
[14]Richard C. Givler, Marcel J. Crochet, R. Byron Pipes, "Numerical Prediction of fiber Orientation in Dilute Suspensions", Journal of Composite Materials,Vol.17, 330-343(1983).
[15]John W. Gillespie, JR., Jean A. Vanderschuren and R. Byron Pipes,"Process Induced Fiber Orientation:Numerical Simulation With Experimental Verification", Polymer Composites, Vol.6, No.2,82-86(1985)
[16]William C. Jackson, Suresh G. Advani and Charles L.
41
Tucker,"Predicting the Orientation of Short Fibers in Thin Compression Moldings.", Journal of Composite Materials,Vol.20,539-557(1986).
[17]Takaaki Matsuoka,Jun-Ichi Takabatake,Yoshinori Inoue,and Hideroh
Takahashi,"Prediction of Fiber Orientation in Injection Molded Parts of Short-Fiber-Reinforced Thermoplastics", Polymer Engineering and Science, Vol.30, No.16,957-966(1990).
[18]J.D. Baldwin, M.C. Alatan, and K. Rajamani,"Structural Analysis of an Injection Molded Short-Fiber-Reinforced Disk", Journal of
Materials Processing and Manufacturing Science", Vol.6, 123-145(1998).
[19]LLOYD A. Goettler,"Mechanical Property Enhancement in Short-Fiber Composites Through the Control of Fiber Orientation During Fabrication", Polymer Composites,Vol.5, No.1, 60-71(1984).
[20]John B. Titchener and John R. Willis,"The Reflection of Electromagnetic Waves from Stratified Anisotropic Media", IEEE Tran. on Antennas and Propagation, Vol.39, No.1, 35-39(1991).
[21]Michael A. Morgan, Dean L. Fisher and Edmund A. Milne,"Electromagnetic Scattering by Stratified Inhomogeneous Anisotropic Media", IEEE Tran. on Antennas and Propagation, Vol.AP-35, No.2, 191-197(1987).
[22]Ming-Shing Lin and Chun Hsiung Chen,"Plane-Wave Shielding
42
Characteristics of Anisotropic Laminated Composites",IEEE Tran. on EMC, Vol.35, No.1, 21-27(1993).
[23]M. Quinten, A. Pack, R. Wannemacher,"Scattering and extinction of evanescent waves by small particles", Applied Physics B,68, 87-
92(1999).
[24]P.Sewell,J.D.Turner,M.P.Robinson,D.W.P.Thomas,T.M.Benson,
C.Christopoulos, "Comparison of analytic, numerical and approximate models for shielding effectiveness with measurement", IEE Proc. Sci. Meas. Technol., Vol.145, 61-66(1998).
[25]J.R. James, A.J. Race and L.A. Scott, "Electromagnetic shielding
degradation effects in composite material enclosures",Electronics letters, Vol.35, No.3, 209-211(1999).