Composite electro-optical testing of surface-mount deviceboards-one manufacturer's experience

摘要

The use of surface-mount devices (SMDs) in the US manufacture ofhigh-quality switchboards presented the need to reduce cost, whilemaintaining traditional quality and reliability, and without decreasingthroughput or adding process steps. Further, the complexity of thedisplay panels demanded a completely automatic test solution without theoperator in the loop. The authors describe the use of automatic opticalinspection in conjunction with electrical testing for a medium-volumemanufacturing situation. The effectiveness of this test solution inmeeting the needs of a major change in device technology is quantifiedfrom measurement accuracy and consistency viewpoints. Increasedproduction efficiency as compared with previous tests strategies isindicated