矽晶電化學放電穿孔加工及其中空孔微電鍍之研究

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姓名

邱俊雄(Jun-xiong Qiu) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

矽晶電化學放電穿孔加工及其中空孔微電鍍之研究
(Study on Silicon by Using Electrochemical Discharge Drilling and Micro Plated-Hollow Hole Method)

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摘要(中)

現今單晶矽加工大多使用電化學加工法且電解液幾乎以氫氟酸或氟化氨相關溶液，其加工成本高並更容易造成人員及環境的危害，本研究提出以氫氧化鈉為電解液進行電化學放電加工，能有改善上述問題及增進加工效率。利用線放電研磨加工法製作方錐螺旋刀具電極，刀具電極的兩側平行面的外形特性，可減少側邊放電過切現象及保有一半螺旋面以增加電解液循環，可有效的提升加工效率及加工精度並利用螺旋刀具電極加工不鏽鋼/矽晶太陽能材料亦有相當優良得加工品質。從實驗結果得知，由於方錐螺旋刀具電極外形特性，大幅減低了氣泡堆積微孔的入口處的現象、減少熱影響區產生，而螺旋刀具電極，雖然具有足夠的螺旋面能增加電解液循環，但受限於兩側曲面螺旋外形的影響導致影響加工效率；並且由於方錐螺旋刀具電極前端鑽頭的外形，不會產生像螺旋刀具電極在較平整的端面處放電火花分散對在工件初始加工時微孔入口形成擴孔喇叭口的狀態。最後結合脈衝電壓及方錐螺旋刀具電極的加工方式與直流電壓及螺旋刀具電極加工效率相互比較下，大幅的減少加工時間及刀具電極消耗量，獲得較高精度之單晶矽微孔。
銅電鍍技術，因其操作簡單、安全且價格低廉，所以大量應用電子元件層間連接方式，但大多以通孔、盲孔為主要的研究課題，本研究提出ㄧ種新型的電極轉動電鍍法，利用電化學放電鑽孔完成孔洞製作後，更新電解液為電鍍液，更換電極極性，改變為電鍍裝置，將製孔、電鍍結合於同ㄧ製程中，利用刀具電極通入孔內實施轉動，實施中空孔電鍍加工，製作中孔電鍍孔，能有效改善導電、散熱及元件裝配之功用，以提高加工效率及電鍍孔於工業上的應用。從實驗結果得知，刀具電極通入孔內加工能增加電鍍液循環效率確實比無刀具電極通入孔內加工，能獲得更佳的銅電鍍沉積效果，最後在加工條件為加工電壓0.3V、加工時間60min、刀具電極轉速100rpm時，能製作出鍍層平坦均勻、填孔效果佳的中空電鍍孔。

摘要(英)

Monocrystalline silicon, being hard, brittle and semi-conductive, poses problems to traditional machining. In this study, it is processed by electrochemical discharge machining (ECDM), which involves high-temperature melting and accelerated chemical etching under the high electrical energy discharged on the electrode tip during electrolysis. To enhance efficiency and precision in monocrystalline silicon micro-hole drilling, square helical tool electrode and pulse voltage are used with sodium hydroxide as the electrolyte. Experimental results show that square helical tool electrode is superior to helical tool electrode for ECDM of monocrystalline silicon. Greater machining efficiency and better micro-hole quality can be achieved by its unique geometrical design which enables stable and regular electrical discharge. It is also have excellent quality to machining composite silicon-based material by using helical tool electrode quality .Pulse voltage with appropriate proportion of pulse-on and pulse-off time also ensures rapid replenishment and good circulation of electrolyte as well as efficient debris removal. Sodium hydroxide can replace hydrofluoric acid or ammonium fluoride as the electrolyte. Not only does it incur lower costs, it is also safe and environmental friendly.
Copper plating, a safe and inexpensive technology with simple operation, has been widely applied to interlayer connection of electronic components via through holes, and blind holes. This study proposes coupling Electrochemical Discharge Machining (ECDM) with rotation and penetration of electrode for fabricating plated hollow holes. Not only does this approach combine hole-making and electroplating in a single process, which saves time, it also improves conductivity, heat dissipation and component assembly, thus enhancing processing efficiency of plated holes in industrial applications. Experimental results show that rotation and penetration of tool electrode contribute to better plating effect, solving the problems including accumulation of plating solution at hole entrance and plated layer of uneven and coarse structure. Finally, ECDM under machining voltage, 0.3 V; machining time, 60 min; and rotational speed of electrode, 100 rpm yielded plated hollow holes with even coating and flat smooth hole wall surface.

關鍵字(中)

★ 電化學放電加工
★ 方錐螺旋刀具電極
★ 微孔
★ 單晶矽
★ 中空電鍍孔
★ 電鍍

關鍵字(英)

★ Electrochemical discharge machining
★ Square helical tool electrode
★ Micro-hole
★ Monocrystalline silicon
★ Plated-hollow hole
★ Electroplating

論文目次

目錄
摘要................................................................................................................i
Abstract...............................................................................................................i
謝誌...............................................................................................................v
目錄..............................................................................................................vi
圖目錄...............................................................................................................x
表目錄............................................................................................................xiv
第一章緒論.........................................................................................................1
1-1 研究動機.................................................................................................1
1-2 文獻回顧.................................................................................................3
1-2-1探討電化學放電加工製程、機制的相關文獻...........................3
1-2-2 探討電鍍加工製程、機制的相關文獻......................................6
1-3 研究目的.................................................................................................8
1-4 本論文之構成.......................................................................................10
第二章實驗原理...............................................................................................12
2-1 放電加工原理.......................................................................................12
2-1-1 放電加工材料移除機制............................................................13
2-2 電化學放電加工原理...........................................................................17
2-2-1 電化學放電加工的放電火花產生過程....................................19
2-2-2 電化學放電加工的材料移除機制............................................21
2-3 電鍍基本原理.......................................................................................22
2-3-1 電鍍流程....................................................................................22
2-3-2 鈀活化劑製程............................................................................23
2-3-3 化學銅製程................................................................................24
2-3-4 酸性光澤銅製程........................................................................25
第三章利用方錐螺旋電極改善電化學放電加工單晶矽微孔加工之研究...27
3-1 前言.......................................................................................................27
3-2 實驗設備與方法...................................................................................28
3-2-1 實驗設備....................................................................................28
3-2-2 實驗材料....................................................................................29
3-2-3 實驗步驟....................................................................................31
3-3 實驗流程...............................................................................................36
3-4 結果與討論...........................................................................................37
3-4-1 不同刀具電極外形對加工效率的影響....................................37
3-4-1-1 加工時間與刀具電極消耗...........................................37
3-4-1-2 EDS 分析.....................................................................41
3-4-1-3 放電波形探討...............................................................43
3-4-2 脈衝電壓的對加工效率及精度的影響....................................44
3-4-2-1 加工時間與刀具電極消耗...........................................44
3-4-2-2 加工後孔徑分析...........................................................46
3-4-2-3 放電波形探討...............................................................49
3-4-3 刀具電極轉速對加工效率及精度的影響................................50
3-4-3-1 加工時間與刀具電極消耗...........................................50
3-4-3-2 加工後孔徑分析...........................................................53
3-5 結論........................................................................................................56
第四章電化學放電加工不鏽鋼/矽晶太陽能材料鑽孔之研究......................57
4-1 前言.......................................................................................................57
4-2 實驗設備與方法...................................................................................59
4-2-1 實驗設備....................................................................................59
4-2-2 實驗材料....................................................................................61
4-2-3 實驗步驟....................................................................................66
4-3 實驗流程...............................................................................................68
4-4 結果與討論...........................................................................................69
4-4-1 電解液濃度對微孔品質的影響................................................69
4-4-1-1 加工時間與刀具電極消耗...........................................69
4-4-1-2 入出口孔徑差分析.......................................................72
4-4-2 刀具電極轉速對微孔品質的影響............................................74
4-4-2-1 加工時間與刀具電極消耗...........................................74
4-4-2-2 入出口孔徑差分析.......................................................76
4-4-3 不同加工電壓對加工品質的影響............................................78
4-4-3-1 加工時間與刀具電極消耗...........................................78
4-4-4 刀具電極與不鏽鋼/矽晶太陽能材料介面行為探討...............83
4-4-4-1 刀具電極表面狀態影響電解液滴形成之介面關係...83
4-4-4-2 刀具電極表面粗操度與絕緣氣膜之介面關係...........85
4-4-4-3 刀具電極與不鏽鋼/矽晶太陽能材料加工介面關係..87
4-4-5 Z軸進給率對微孔品質的影響...............................................92
4-4-5-1 加工時間與刀具電極消耗...........................................92
4-4-6 脈衝電壓對微孔品質的影響....................................................95
4-4-6-1 加工時間與刀具電極消耗...........................................95
4-4-6-2 入出口孔徑差分析.......................................................97
4-4-6-3 放電波形探討...............................................................99
4-5 結論.....................................................................................................101
第五章結合電化學放電加工與電極轉動電鍍法製作中空電鍍孔之研究.102
5-1 前言.....................................................................................................102
5-1-1 中空電鍍孔製作原理..............................................................103
5-2 實驗設備與方法.................................................................................104
5-2-1 實驗設備..................................................................................104
5-2-2 實驗材料..................................................................................105
5-2-3 實驗步驟..................................................................................110
5-3 實驗流程.............................................................................................112
5-4 結果與討論.........................................................................................113
5-4-1 不同加工時間對鍍層加工的影響..........................................113
5-4-1-1 無刀具電極通入加工...................................................113
5-4-1-2 刀具電極通入加工.......................................................114
5-4-2 不同脈衝電壓及加工電壓對鍍層加工的影響......................116
5-4-2-1 不同脈衝電壓週期對鍍層加工的影響.......................116
5-4-2-2 不同加工電壓對鍍層加工的影響...............................119
5-4-3 不同刀具電極轉速對鍍層加工的影響..................................121
5-5 結論...................................................................................................128
第六章總結論.................................................................................................129
參考文獻...........................................................................................................132
作者簡介...........................................................................................................137

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指導教授

顏炳華、王阿成(Biing-hwa Yan A-cheng Wang)

審核日期

2015-6-29

推文