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High-speed autoverifying technology for printed wiring boards

机译：用于印刷线路板的高速自动化技术

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We have developed an automated pattern verification technique. The output of an automated optical inspection system contains many false alarms. Verification is needed to distinguish between minor irregularities and serious defects. In the past, this verification was usually done manually, which led to unsatisfactory product quality. The goal of our new automated verification system is to detect pattern features on surface mount technology boards. In our system, we employ a new illumination method, which uses multiple colors and multiple direction illumination. Images are captured with a CCD camera. We have developed a new algorithm that uses CAD data for both pattern matching and pattern structure determination. This helps to search for patterns around a defect and to examine defect definition rules. These are processed with a high speed workstation and a hard-wired circuits. The system can verify a defect within 1.5 seconds. The verification system was tested in a factory. It verified 1,500 defective samples and detected all significant defects with only a 0.1 percent of error rate (false alarm).
机译：我们开发了一种自动模式验证技术。自动光学检测系统的输出包含许多误报。需要验证以区分轻微的违规行为和严重缺陷。在过去，这种验证通常是手动完成的，这导致了不令人满意的产品质量。我们新的自动验证系统的目标是检测表面安装技术板上的图案功能。在我们的系统中，我们采用了一种新的照明方法，它使用多种颜色和多个方向照明。使用CCD相机捕获图像。我们开发了一种新的算法，它使用CAD数据进行图案匹配和模式结构确定。这有助于在缺陷周围搜索模式并检查缺陷定义规则。这些通过高速工作站和硬连线电路处理。系统可以验证1.5秒内的缺陷。验证系统在工厂进行了测试。它验证了1,500个缺陷的样本，并检测到所有显着缺陷，只有0.1％的错误率（误报）。

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