Title :
Automatic opitcal through hole inspection method for printed wiring boards using leakage light detection
Author :
Ando, Moritoshi ; Mita, Kikuo ; Inagaki, Takefumi
Author_Institution :
FUJITSU LABORATORIES LTD., ATSUGI, Ono, Atsugi, Kanagawa, Japan
Abstract :
New automatic through hole inspection techniques for printed wiring boards (PWBs) were developed. The new method called Leakage Light Detection can detect defects such as cracks and breaks in plating of through holes with aspect ratio as large as ten. A prototype system for automatic through hole inspection is constructed, based on these techniques. This system detects defects in a 250 mm × 250 mm area of a PWB in 8 minutes.
Keywords :
Absorption; Circuits; Conductivity; Inspection; Laboratories; Leak detection; Prototypes; Testing; Very large scale integration; Wiring;
Conference_Titel :
Robotics and Automation. Proceedings. 1985 IEEE International Conference on
DOI :
10.1109/ROBOT.1985.1087344
