為因應市場需求,記憶體模組由於表面黏著技術(Surface Mount Technology, SMT)之進步近年來已趨向輕、薄、短、小、大容量及快速運算速度之記憶體模組產品。在面對先進的SMT技術時,對於電路板錫膏印刷製程的要求日趨重要。 有鑑於目前業界所使用經驗法則之印刷參數,曠日費時且成本昂貴,因此,本研究利用田口法(Taguchi method)來決定最佳的錫膏印刷參數設定。本研究篩選出焊盤間距、脫膜速度、刮刀速度、刮刀壓力、開孔比率、錫膏種類、鋼板厚度與錫膏黏度等參數作為實驗的控制因子,利用3D錫膏厚度檢測儀量測所有印刷基板焊盤之印刷錫膏厚度,並將錫膏厚度、體積、面積基礎資料匯入XML Watcher軟體分析相關類別型零件,然後採Process Insight製程能力分析軟體找尋最佳印刷參數組合進行比對驗證績效,選擇出較佳組合供生產線參考使用。 本研究針對0.30mm、0.35mm與0.40mm之焊盤進行分析並訂定出最佳參數組合並且以0.30mm之參數組合做為生產製程能力之驗證。結果發現目前生產製程能力之 Cpk值可由1.456提升到1.698,明顯改善製程能力。
Due to the advances in surface mount technology (SMT) in recent years, DRAM module has trended to become lighter, thinner, shorter, smaller, and have large capacity and fast processing speed. In the face of advanced SMT technology, requirements for the circuit board solder paste printing process have become increasingly strict. Currently the industry uses rule of thumb to determine the printing parameters which is time-consuming and expensive. Therefore, this study applies Taguchi method in determining the optimal parameters for solder paste printing process. The parameters including scraping speed, pad spacing, hole-opening ratio, scraping pressure, stripping speed, solder paste type, plate thickness, and paste viscosity are used as control factors. Solder paste thickness, volume, and based-area data are inputted into the XML Watcher software for analysis with related category parts, then the Process Insight process capability analysis software is used to determine process capability of the best printing parameter combination. The optimal parameters combination has found for 0.30mm, 0.35mm and 0.40mm pad printing process. In addition, a validation experiment has been performed. The result shows that 0.30mm printing process capability increases from current value of Cpk = 1.456 to Cpk = 1.698.