DOE在SMT丝网印刷中质量改进的应用

影响丝网印刷质量的主要因素有焊膏的特性、模版与PCB的制造质量、印刷机的工艺参数和性能以及操作工艺流程是否规范等。当前，由于无铅焊膏的使用，焊膏物理性能变化，需要重新摸索调整无铅焊膏的印刷参数，以获得最好的焊膏印刷质量。文章借助质基改进中DOE质量工具的理论，结合实际工艺参数特性建立了相应的正交表，并采用了极差分析法和MINITAB软件分析法。通过建立最优响应模型，选出了最优参数的近似值，并得到了实际生产中的验证，明显提高了SMT良率。

Application of DOE on Quality Improvement in SMT Screen Printing

In SMT, the screen printing process is the first, most important and most critical to ensure product quality. The main factors to screen printing is the characteristics of solder paste, stencil, PCB manufacturing quality, and printing process parameters , as well as whether the standard operating process. Especially the use of lead-free solder paste which require engineer to find out the optimization parameters. This article improve the quality combined DOE with the actual process parameters characteristic ...