錫球均勻液滴製程及液滴影像控制之研究

A Study on the Production of Uniform Droplet Spray and Image Feedback Control

10.29809/JTFS.200706.0002

邱啓勝(Chi-Sheng Chiu)；孫憲琪(Hsien-Chi Sun)；趙隆山(Long-Sun Chao)

錫球 ； 高速影像擷取 ； 液滴直徑和回授控制頻率 ； Solder ball ； High-speed image capture system ； Droplet diameter and Frequency control of feedback

鑄造工程學刊

33卷2期（2007 / 06 / 01）

14 - 25

繁體中文

以錫球均勻液滴噴射製程(Uniform-Droplet Spray process)為主概念，並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，建立系統化之球狀焊材製程技術。本研究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，搭配使用氮氣注入均勻液滴噴射機構之腔體中，使其達到腔體內外壓差之穩定氣體與絕氧設計以射出均勻錫球液滴(Sn-37wt%Pb)，且運用影像放大分析系統，使所拍攝的影像能準確的計算出液滴球的直徑，將其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，再經由回授程式控制震盪器產生的頻率控制改變粒徑大小，以研製連續單粒固定範圍直徑之液滴球製程，使得產生固定尺寸範圍的錫液滴球或微小水球。

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.