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Here are two fine examples of third optical
inspection systems when such systems were at their zenith. Used in
assembly to accept, rework or reject wire bonds in un-lidded
packages prior to sealing, the 3rd Op station was both a critical
customer satisfaction point as well as a critical quality control
point in the manufacturing line.
These ASM/AAL systems were semi-automated; an inspector was still
needed to view the bonds, decide their status and enter the results
manually into the keyboard at the right. If the packages were
acceptable, a good operator could inspect about 400 units per hour.
If she needed to enter, reject, or rework codes, the rate dropped
dramatically while labor rates accelerated. Hence it was no accident
that early line managers hated to gather data and fought it
furiously until visual inspection machines became fully automatic
and computers came into play for data collection.
These two systems are also fine examples of the development and
evolution of in-line systems as they could mate with competitor’s
systems that provided lid bonding after rework.
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