Detecting Circuit Board Defects

Confocal Displacement Sensors Measure Circuit Board Defects

Confocal displacement sensors are used to scan the backdrill holes of circuit boards

Circuit boards have complex designs and their sizes are becoming tinier and tinier. Companies that specialize in PCB inspection systems need ultra-precise measurement sensors to profile tiny features like holes, solder joints, pin locations, etc. One integrator uses the CCS Prima Confocal Displacement Sensor to scan the back surface of circuit boards to detect and measure defects in backdrill holes. The position and depth of these holes are critical to their proper function. The narrow beam of the confocal sensors traces the complete profile of the board and can measure the true depths of these narrow holes. This is something triangulation laser sensors can not do because of occlusion of the beam reflected beam path.

The same technology is used to measure the tiny connector pins for the detection of missing, bent, crushed or misaligned pins and connectors.

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