A connected factory automates the AOI validation process.

Automated optical inspection (AOI) is typically used after solder reflow to detect missing components and defects. Performing a successful inspection of a panel is not enough, however. Manufacturing execution systems (MES) are used for process control and AOI data collection to ensure the following are accomplished:

• All prior routing operations passed.
• Valid test program is loaded on the machine.
• Test start- and end-times and test results are captured.
• Failed printed circuit boards (PCB) cannot advance in the production routing and must enter rework loop.

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