| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for detecting a defect in a through hole capable of detecting surely quality of the through hole, as to the method and the device for detecting the defect in the through hole. SOLUTION: This method/device is provided with a heating means 20 capable of heating an inside of the through hole 4 provided in a printed circuit board 1, and a resistance measuring means 22 for measuring a resistance between both ends of the through hole 4 heated by the heating means 20. The quality of the through hole is measured by this manner, since it is known that a defective part inside the through hole is disconnected or gets highly resistive when the through hole is heated for a prescribed time. COPYRIGHT: (C)2006,JPO&NCIPI
|
