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随着电子技术应用不断扩大,印刷电路板的尺寸、电路密度、层数和产量都在增加,已成为电子组装中的关键。这样要求提高布线图的生产效率。布线图生产过程包括图形数据发生、原图成像、从原图上复制图形和检验等步骤。除了从原图复制布线图纯属照相过程外,其他几个加工步骤中,随着布线图的尺寸和复杂性增加,加工时间就要增加。在图形数据发生和检验过程中要实现全自动化有困难,因此要想在这两方面提高生产效率可能性不大。然而,在原图成像方面很容易实现自动化,一般采用光学绘图仪成像原图。用这种方法绘制一张图需要时间20h以上,因此,长时间工作s
As the application of electronic technology continues to expand, the printed circuit board size, circuit density, number of layers and yield are increasing, has become the key in electronic assembly. This requires increasing the production efficiency of the wiring diagram. The production process of the wiring diagram includes the generation of graphic data, the imaging of the original image, the steps of copying the graphic from the original image and testing. In addition to the purely photographic process of copying the wiring from the original image, the processing time increases as the size and complexity of the wiring pattern increase in several other processing steps. It is not possible to achieve full automation in the process of image data generation and inspection, so it is unlikely that it will be necessary to improve the production efficiency in both areas. However, it is easy to automate the imaging of the original image, and the optical image is generally used to image the original image. Drawing a graph in this way takes more than 20 hours, so working long hours