SOLDER INSPECTION EQUIPMENT AND METHOD

摘要

PURPOSE: To determine an accurate quality of solder, utilizing a phenomenon that satisfactory solder is raised to have a certain height, so that a light-dark ratio of the satisfactory solder is drastically different from that of low and flat defective solder when vertically illuminated.CONSTITUTION: A luminaire 22 irradiates a substrate surface with vertical light and an imaging apparatus 25 captures an image of an area including a solder part from directly above. An image of the solder part is extracted from the image captured by the imaging apparatus, and a dark area ratio in the extracted image of the solder part is obtained. The obtained dark area ratio is compared with a predetermined threshold value to determine the quality of solder.SELECTED DRAWING: Figure 6