| 摘要 |
PURPOSE:To position a probe in a proper position even if a printed substrate is subjected to thermal expansion and contraction, by installing a camera to an XY table provided with the probe, and inputting a picture image of an IC lead directly by this camera. CONSTITUTION:On an XY table 1 moving in parallel with a printed substrate surface, a camera 7 is provided together with a probe 2. The camera 7 is constituted so as to input a picture image on the printed substrate, and to reflect a pattern pad 8 and a lead 5 of an IC. A scanning line 10 is derived from an inputted picture image 9 and subsequently a level of the scanning line 10 is confirmed by a threshold level 11, by which size is decided. By deciding this size, a binary-coded signal 12 is generated, and expansion and contraction legnth DELTAl of a lead 5'' and a pattern pad 8'' is calculated. Subsequently, by correcting a positioning data, the probe can be positioned properly even if the printed substrate is subjected to expansion and contraction. |
