本研究開發了一個具有獨特層狀結構的電磁波屏蔽材料，此特別的結構可以吸收電子元件內部其自身所產生的電磁波，以及阻絕外部電磁波的干擾。這個結構由兩層複合材組成，內層為含有多壁奈米碳管以及釹鐵硼磁鐵(NdFeB magnet)之環氧樹脂複合材，此層的作用為電磁波吸收層；外層則是由多壁奈米碳管塗布於不織布之複合膜，此層的作用為電磁波的反射層。當內部所產生的電磁波雜訊接觸到內層環氧樹脂複合材吸收層時，電磁波能量會被做初次的吸收，接著當電磁波進一步接觸到外層多壁碳管膜反射層時，由於多壁碳管膜的高導電性，此時電磁波會幾乎被反射，將再次經過環氧樹脂複合材做二次的吸收。當外來電磁波雜訊接觸到試片時，外部的反射層將直接予以反射。
此層狀的結構設計確保了電子元件不被外部的電磁波所干擾，同時，有確保此元件不會被本身所產生的電磁波雜訊干擾。此多壁奈米碳管膜/環氧樹脂複合材相當薄，厚度約1 mm，且製程簡單，因環氧樹脂及奈米碳管複合材具有一定的機械強度，因此可以直接作為被屏蔽元件的外殼。

This work develops a unique layered structural composite to prevent the device from internal electromagnetic (EM) waves’ self-disturbance and external EM wave interference. The composite is composed of two layers, the inner layer is a hybrid composite, using MWCNTs and NdFeB powders as fillers and epoxy as matrix, which is designed as absorbent layer, and the outer is MWCNT-coated non-woven fabric, which is treated as reflection layer. The inner layer containing MWCNTs and magnetic powder of NdFeB can firstly absorb parts of EM waves generating from inside devices, and when the rest EM waves transmit through the inner layer and impinge to the outer layer, almost all of the waves will be reflected back. The reflected waves will go through the inner layer and be absorbed again. In the meanwhile, as the external EM waves impinge to the outer layer, they will be reflected immediately. The optimal combination of this study is able to achieve over 92% absorption and leave least than 8% reflection of internal EM waves, and over 99.99% reflection of external EM waves.

摘要 I
Abstract II
致謝 III
第一章 緒論 1
1.1 前言 1
1.2 研究動機 2
第二章　文獻回顧 5
2.1 電磁波干擾理論 5
2.2 電磁波屏蔽機制 7
2.2.1反射機制 10
2.2.2吸收機制 11
2.2.3多重反射機制 11
2.3 以吸收機制為主之屏蔽材料 12
2.3.1 介電損耗型 12
2.3.2 電阻損耗型 14
2.3.3 磁損耗型 15
2.3.4 干涉損耗型 15
2.4 奈米碳管簡介 16
2.4.1 奈米碳管結構 17
2.4.2 奈米碳管電性 18
2.5 釹鐵硼磁鐵簡介 19
第三章　實驗分析及方法 32
3.1 製程設備與材料分析儀器 32
3.1.1 超聲波震盪機 32
3.1.2 四方刮刀 32
3.1.3 三軸滾輪機 33
3.1.4 熱壓機 33
3.1.5 場發射掃描式電子顯微鏡 33
3.1.6 X光繞射分析儀 34
3.1.7 拉曼光譜儀 35
3.1.8 超導量子干涉儀 35
3.1.9 四點探針 36
3.1.10 向量網路分析儀 37
3.2 實驗步驟及方法 38
3.2.1 藥品準備 38
3.2.2 多壁奈米碳管膜之塗布 38
3.2.3 釹鐵硼磁粉/ 多壁奈米碳管/ 環氧樹脂複合物之混合 39
3.2.4 熱壓疊合試片之製備 39
第四章　結果與討論 45
4.1 材料分析 45
4.1.1 場發射掃描式電子顯微鏡之形貌觀察 45
4.1.2 拉曼光譜儀分析 46
4.1.3 磁性質分析 48
4.1.4 X光繞射光譜分析 49
4.2 片電阻分析 50
4.3 電磁波屏蔽效率分析 51
4.3.1 介電係數以及磁導率量測 51
4.3.2 電磁波屏蔽效率量測及分析 53
第五章 結論 70
參考文獻 71

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