| 摘要 |
PURPOSE:To check the soldered parts in various shapes for may kinds of chip parts which are soldered on a printed board by arranging a plurality of lights in a checking apparatus. CONSTITUTION:An electrode 15a of a chip part 15 is soldered to a pad 12c of a printed board 12. Lights 2b and 2c are lit, and projecting light beams E and F are projected. Since the two lights are lit, the regular reflected light having high luminance caused by either of the projected light beams becomes the reflected light G. The reflected light G is inputted into an ITV camera 3 even if the shape of a soldered part 18 is changed in the range of good products. Therefore, it is not necessary to set a reference value for judging pass of fail at a low value. The accuracy in checking can be maintained at a high level. Even if the two lights are lit at the same time, decrease in accuracy due to excessive irregular reflected light can be prevented when the mutual angles of the projected light beams are properly adjusted. Namely, the soldered parts of the many kinds of the soldered chip parts 15 on the printed board 12 that is mounted on an X-Y stage can be checked automatically and highly accurately by properly lighting a plurality of the lights. |
