PCBA  AOI stands for "Printed Circuit Board Assembly Automated Optical Inspection." It is a technology used in the manufacturing and quality control of printed circuit board assemblies (PCBAs). AOI systems are designed to automatically inspect and identify defects in PCBAs, helping to ensure the integrity and functionality of the electronic components.


Here's how PCBA AOI works:

Inspection Process: During the manufacturing process of a printed circuit board assembly, various components are soldered onto the PCB. The AOI system is placed in the assembly line, typically after the soldering process.

Capture Images: The AOI system uses cameras and imaging technology to capture high-resolution images of the PCB. These images may include both the top and bottom sides of the board.

Comparison and Analysis: The captured images are then compared to a reference image or CAD (Computer-Aided Design) data of the PCB. The AOI system analyzes these images for discrepancies, defects, and deviations from the expected soldering and component placement.

Defect Detection: The AOI system identifies a wide range of defects, including solder joint issues (such as insufficient solder, bridging, or cold solder joints), missing components, incorrect component placement, polarity issues, and more.

Reporting: When a defect is detected, the AOI system generates a report, which can include images of the defect and its location on the PCB. This report is then used by quality control personnel for further analysis and potential rework or repair.

PCBA AOI offers several advantages, including increased inspection speed, reduced human error, and the ability to detect defects that may not be easily visible to the human eye. It helps manufacturers maintain high-quality standards and ensure that their PCBAs meet the required specifications.