| 研究生: |
邱啟勝 Chiu, Chi-Sheng |
|---|---|
| 論文名稱: |
BGA錫球製程研究及影像控制 A Study on the Production of BGA Solder Balls & image control |
| 指導教授: |
趙隆山
Chao, Long-Sun |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 工程科學系碩士在職專班 Department of Engineering Science (on the job class) |
| 論文出版年: | 2006 |
| 畢業學年度: | 94 |
| 語文別: | 中文 |
| 論文頁數: | 71 |
| 中文關鍵詞: | 均勻液滴 、錫球 、影像擷取系統 |
| 外文關鍵詞: | solder ball, Uniform-Droplet Spray, image-enlargement analysis system |
| 相關次數: | 點閱:168 下載:2 |
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中 文 摘 要
本研究運用高速影像擷取系統、影像放大分析系統、溫控加熱模組、微機電振動與回授系統等技術,建立系統化的球柵陣列(BGA)球狀焊材製程技術,並以均勻液滴噴射製程為主概念之錫球製程。本文使用壓電式震盪器產生均勻之擾動波並建立液滴成形環境絕氧處理機制將熔融液體液滴化,使用氮氣注入均勻液滴噴射機構之腔體中,以達到腔體內外壓差之穩定氣體射出均勻錫液滴球(Sn-37wt%Pb),並利用影像回授系統控制震盪器產生的頻率,使得產生固定尺寸範圍的錫液滴球或微小水球。
本文著重於(1)以三種噴嘴孔徑(0.44mm、0.33mm和0.22mm)建立均勻液滴噴射製程之最佳參數為主概念;(2)使用壓電式震盪器液滴化處理方法,以產生均勻之擾振動波,配合腔體內絕氧環境使之射出均勻錫球;(3) 運用影像放大分析系統使所拍攝的液滴球能準去的計算出液滴球的直徑;(4) 使用高速影像擷取系統與影像分析系統兩者所分析之液滴球直徑,經由回授程式控制震盪器產生的頻率,以研製連續單粒固定範圍直徑之液滴球製程;(5)液滴球設備之實驗環境設定與建立簡單化之機構。於實驗條件設定部分,經由適度調整震盪頻率、震盪桿與坩鍋圓型孔洞距離及氣體吹出壓力等參數,分別對於三種噴嘴孔徑做均勻液滴噴射製程實驗,各別找出球徑大小、擾動頻率與吹氣壓力之關係式,可提供相同製程製作錫球液滴之參考。
並將本實驗之有回授控制與無回授控制所產出的錫液滴球進行影像的尺寸分部分析,以驗證本研究有回授控制之可行性與實用性。未來的研究方向將朝著特殊錫球研製、吹氣壓力控制系統改良及電腦化品質檢驗分析等三個方向進行。
Abstract
With the integration of high speed image capture system, image-enlargement analysis system, temperature-control heating module, micro-machinery techniques and feedback system, this study is to develop a systematically fabricated process of BGA solder ball based on the concept of the Uniform-Droplet Spray (UDS).
A piezoelectric vibrator was applied to generate uniform disturbance waves and nitrogen was used to expel the oxygen to produce an oxygen-isolated environment, which make molten metal become droplets. With a stable pressure difference of gas between the inside and the outside of the crucible and the frequency control of the vibrator by an image feedback system, the droplets of uniform size can be ejected from the nozzle located at the bottom of the crucible. After solidification, the liquid droplets of Sn-37wt%Pb alloy become the solder balls of a fixed diameter.
This study put more emphasis on the following concepts and working conditions: (1) the inlet diameters of the nozzles are 0.44 mm, 0.33mm, and 0.22mm, respectively, (2) the combination of the piezoelectric vibrator and the oxygen-isolation environment for making uniform solder balls, (3) the usage of the image-enlargement system for precisely measuring the diameters of the solder balls, (4) the usage of feedback program for continuously producing the solder balls of a fixed diameter, (5) the adjustment of the working parameters (including the distance between the end of the vibrating rod and the outlet hole of the crucible, vibrating frequency, and gas pressure) for obtaining the relationship among them.
With and Without the feedback control, the diameter distributions of the resulting solder balls were analyzed to verify the feasibility and practicability of the feedback control. The future work can be on (1) the fabrication of the smaller solder balls, (2) the modification of the gas pressure control, (3) the computerization of the quality analysis of the produced solder balls.
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