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研究生: 陳建安
Chen, Jian-An
論文名稱: 氧化銦錫之分散性對靶材性質改善之研究
Study of the Improvement of Target Properties by the Dispersibility of Indium Tin Oxide
指導教授: 施士塵
Shi, Shih-Chen
學位類別: 碩士
Master
系所名稱: 工學院 - 機械工程學系
Department of Mechanical Engineering
論文出版年: 2020
畢業學年度: 108
語文別: 中文
論文頁數: 91
中文關鍵詞: 氧化銦錫靶材分散穩定性磨潤
外文關鍵詞: Indium tin oxide, Target, Dispersion stability, Wear
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  • 氧化銦錫靶材之表面在長時間濺鍍後,容易生成結瘤。研究顯示氧化錫添加量超過7 at.%超過固溶極限,必定在靶材中析出二次相(In4Sn3O12),二次相之電阻率為主相之兩倍,若氧化錫分散不均勻,必然造成局部高電阻值,且團聚之粒子在燒結後會產生較大之孔洞,同樣會形成電荷積聚,而在長時間濺鍍後形成表面結瘤,並在濺鍍時產生電弧以及大顆粒噴濺,使濺鍍薄膜表面受損,影響產能。
    研究結果顯示奈米粒子分散後,以檸檬酸二銨獲得最小之平均液動直徑,有效減緩奈米粒子之沉降速度,提高氧化錫之摻雜均勻性,乾燥後使粒子之堆積密度增加,燒結成陶瓷使陶瓷之密度提升,內部孔隙缺陷減少,並形成較均勻之晶相組織。旋塗薄膜之電性受氧空缺以及氧化錫之摻雜均勻性所影響,在相同之退火氛圍下,氧化錫摻雜均勻性成為影響電阻率及載子濃度之主要條件,平均液動直徑越小、消光比越高之漿料,薄膜之電阻率越低。檸檬酸二銨製備之陶瓷,其表面孔洞較少,磨除之銅無法鑲嵌在陶瓷表面與對磨件銅珠產生潤滑作用,銅珠與陶瓷表面之接觸面積隨磨耗距離增加而變大,摩擦係數大幅上升。旋塗薄膜較均勻且不易移除,銅珠與玻璃基板間之氧化銦錫粒子數量較分散性差之薄膜細小且數量較多,因此在銅珠表面留下較大面積之磨損。

    The surface of the indium tin oxide target is prone to nodules after a long time sputtering. Studies have shown that if the amount of tin oxide added exceeds 7 at.% and exceeds the solid solution limit, the secondary phase (In4Sn3O12) must be precipitated in the target. The resistivity of the secondary phase is twice that of the main phase. If the tin oxide is not uniformly dispersed, it must be Causes local high resistance value, and the agglomerated particles will produce larger holes after sintering, and will also form charge accumulation, and form surface nodules, and generate arcs and large particles spray during sputtering, So that the surface of the sputtered film is damaged, affecting productivity.
    The research results show that after the nanoparticles are dispersed, diammonium citrate(DAC) is used to obtain the smallest average hydrodynamic diameter, which effectively slows down the sedimentation speed of the nanoparticles, improves the uniformity of the doping of tin oxide, and increases the bulk density of the particles after drying. Forming ceramics increases the density of ceramics, reduces internal pore defects, and forms a more uniform crystal structure. The electrical properties of spin-coated films are affected by oxygen vacancies and the uniformity of tin oxide doping. Under the same annealing atmosphere, the uniformity of tin oxide doping becomes the main condition that affects the resistivity and carrier concentration. The average hydrodynamic diameter is A paste with a smaller and higher extinction ratio has a lower resistivity of the film. The ceramics prepared by DAC have fewer surface holes, and the polished copper cannot be embedded on the ceramic surface and lubricate the copper beads of the grinding parts. The contact area between the copper beads and the ceramic surface increases with the increase in the wear distance, and the friction The coefficient has risen sharply. The spin-coated film is more uniform and difficult to remove. The number of indium tin oxide particles between the copper beads and the glass substrate is smaller and larger than the poorly dispersed film, so a larger area of wear is left on the surface of the copper beads.

    口試合格證明 I 摘要 II Study of the Improvement of Target Properties by the Dispersibility of Indium Tin Oxide(ITO) III 誌謝 XXII 總目錄 XXIII 表目錄 XXVI 圖目錄 XXVII 第1章 緒論 1 1-1 前言 1 1-2 研究動機 4 1-3 研究目標與歷程 5 第2章 文獻回顧 6 2-1 奈米粒子 6 2-2 氧化銦錫(Indium Tin Oxide, ITO) 7 2-3 奈米懸浮液 12 2-3-1 雙電層(Electric Double Layer) 13 2-3-2 空間位阻穩定(Steric stabilization) 17 2-3-3 超聲波分散法 20 2-4 粒子尺寸對陶瓷靶材密度之影響 24 2-5 靶材性質對PVD薄膜之影響 27 第3章 實驗內容 32 3-1 實驗目的 32 3-2 實驗流程 32 3-3 實驗方法 34 3-3-1 奈米懸浮液製備流程 34 3-3-2 沉澱實驗 35 3-3-3 奈米懸浮液粒徑分析 35 3-3-4 奈米懸浮液分散穩定性 36 3-3-5 奈米懸浮液表面帶電分析 37 3-3-6 陶瓷生胚製備流程 38 3-3-7 材料性質分析 39 3-3-8 表面幾何性質分析 40 3-3-9 硬度試驗 40 3-3-10 磨耗試驗與分析 40 3-3-11 基板準備及成膜 41 3-3-12 膜厚量測 41 3-3-13 薄膜電性分析 42 3-3-14 磨耗試驗與分析 42 3-3-15 二次相晶粒分析 42 3-4 實驗設備 44 第4章 實驗結果與討論 46 4-1 奈米懸浮液的分散穩定性 46 4-1-1 超聲波功率調整 48 4-1-2 分散劑添加量調整與選用 49 4-1-3 界面電位量測 56 4-1-4 消光比(A/A0) 58 4-1-5 離子強度實驗 61 4-2 旋塗薄膜性質分析 62 4-2-1 薄膜厚度 63 4-2-2 電性分析 65 4-3 陶瓷燒結體性質分析 69 4-3-1 生坯與陶瓷之相對密度 69 4-3-2 二次相分析 70 4-3-3 硬度分析(補DTAB、pH11_DAC、D305) 74 4-3-4 電阻分析 75 4-4 磨潤特性分析 77 4-4-1 陶瓷表面形貌及表面幾何性質 77 4-4-2 陶瓷燒結體磨耗試驗 79 4-4-3 旋塗薄膜磨耗試驗 83 第5章 總結 87 5-1 結論 87 5-2 未來展望 88 參考文獻 89

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