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6 May 1993 I/O pin solder-point inspection system
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Proceedings Volume 1907, Machine Vision Applications in Industrial Inspection; (1993)
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States
We have developed an automated inspection system that features perpendicular and variable- intensity lighting for image contrast enhancement and improved sensing accuracy, a high- resolution camera with reflection-adaptive binarization for improved image processing, and an adaptive inspection algorithm that modifies its defect definition criteria according to target position quickly, accurately, and reliably inspects highly dense arrays of perpendicular I/O pins soldered onto a ceramic printed wiring board (PWB). The system's Mega-Scope, a high- resolution, eight-bit gray-scale CCD camera, images a 2048 X 2048-pixel area with a 10 micrometers resolution in 4 seconds, taking 60 I/O pin images at a time. The total time to inspect the position and solder fillet condition of more than eight thousand I/O pins is just 30 minutes.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tetsuo Koezuka, Yoshinori Suto, and Moritoshi Ando "I/O pin solder-point inspection system", Proc. SPIE 1907, Machine Vision Applications in Industrial Inspection, (6 May 1993);

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