APPEARANCE INSPECTION OF SOLDERED PART FOR ELECTRONIC COMPONENT

摘要

PURPOSE:To achieve a simple and accurate inspection to determine whether a soldered part is normal or not by detecting an end face of an electrode on the side of an electronic component mounted on a substrate by an optical means for detecting a switching of brightness. CONSTITUTION:A substrate 1 is set on a positioning section 4 comprising X-Y tables 2 and 3. Start lines m1 and n1 for an optical scanning is set inward from a position at which an electrode Q is assumed to be mounted and goal lines m2 and n2 set outward therefrom. An optical scanning is performed to the goal lines m2 and n2 from the start lines m1 and n1 as indicated by a scan line l1 and a position at which brightness is changed from a bright to dark state is checked to detect an end face Qb. In this case, as indicated by a scan line l2, a point at which it is changed from the bright to dark state is checked to detect the end face Qb. This enables detection of a normal soldered part together with a defective soldered part.