| 摘要 |
PURPOSE:To positively detect even a small failure with a short measurement. CONSTITUTION:Each measurement point of a printed wiring board 4 loaded into a thermal shock testing machine 3 is connected to a scanner 8 and the output terminal of the scanner 8 is connected to a resistance meter 9. Also, switching of each measurement point is controlled by a controller 10A. While the resistance of each measurement point is measured continuously, thermal stress is applied to the printed wiring board 4. When thermal stress is applied, a thermal stress with an abrupt negative temperature difference (-DELTAt) is applied or that with an abrupt positive temperature difference (+DELTAt) is applied while executing continuous continuity test of a conductor. |
