METHOD FOR DETECTING WHETHER ACF IS PASTED

摘要

PROBLEM TO BE SOLVED: To detect whether an ACF is pasted on a group of leads formed on a substrate, by a simple structure. SOLUTION: Using a television camera 36 for detecting the positional deviation of an electronic circuit component 7 when placing the electronic circuit component 7 mounted on a liquid crystal cell 1 on a PCB placement section 17 of a transportation unit 13, a group of leads 6 of a PCB 5 are formed and, at the same time, an image of a part where an ACF 10 is pasted is obtained. With a difference in density which comes from a contrast between a pattern of a lead 6a before the ACF 10 is pasted and a ground of a substrate being a reference difference in density, a pattern of the lead 6a actually measured after the ACF 10 is pasted and the ground of the substrate are compared for a difference in actually measured density to judge whether the ACF 10 is actually pasted or not.