Automated Optical Inspection (AOI) PCB Assembly Companies

A list of PCB Assembly Companies who provide Automated Optical Inspection (AOI) testing. PCB Directory is the largest directory of PCB Assembly service providers on the internet. Use the filters provided to find companies based on their location and capabilities.

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  • Testing: Automated Optical Inspection (AOI)
    • Board Type:
    • Flexible,
    • Hybrid,
    • Rigid,
    • Rigid-Flex
      • Assembly Type:
      • Surface Mount,
      • Thru Hole
        • Soldering Type:
        • Lead-Free (RoHS),
        • Reflow Soldering,
        • Selective Soldering,
        • Wave Soldering
          • Industry:
          • Aerospace and Defense,
          • Automotive,
          • Commercial,
          • Energy,
          • Industrial,
          • Lighting,
          • Marine,
          • Medical,
          • Telecom
          • Aerospace and Defense,
          • Automotive,
          • Commercial,
          • Energy,
          • Industrial,
          • Lighting,
          • Marine,
          • Medical,
          • Telecom
          • Assembly Type:
          • Surface Mount,
          • Thru Hole
            • Soldering Type:
            • Lead-Free (RoHS),
            • Reflow Soldering,
            • Wave Soldering
              • Industry:
              • Aerospace and Defense,
              • Automotive,
              • Commercial,
              • Energy,
              • Industrial,
              • Lighting,
              • Marine,
              • Medical,
              • Telecom
              • Aerospace and Defense,
              • Automotive,
              • Commercial,
              • Energy,
              • Industrial,
              • Lighting,
              • Marine,
              • Medical,
              • Telecom
              • Board Type:
              • Flexible,
              • HDI,
              • Hybrid,
              • Rigid,
              • Rigid-Flex
                • Assembly Type:
                • Mixed,
                • Surface Mount,
                • Thru Hole
                  • Soldering Type:
                  • Hand Soldering,
                  • Lead-Free (RoHS),
                  • Leaded Solder,
                  • Reflow Soldering,
                  • Robotic Soldering
                  • Selective Soldering,
                  • Tin-lead Solder
                  • Wave Soldering
                  • Industry:
                  • Automotive,
                  • Commercial,
                  • Energy,
                  • Industrial,
                  • Lighting,
                  • Medical,
                  • Telecom
                  • Automotive,
                  • Commercial,
                  • Energy,
                  • Industrial,
                  • Lighting,
                  • Medical,
                  • Telecom
                  • Assembly Type:
                  • Mixed,
                  • Surface Mount,
                  • Thru Hole
                    • Soldering Type:
                    • Reflow Soldering,
                    • Wave Soldering
                      • Industry:
                      • Commercial,
                      • Industrial
                      • Commercial,
                      • Industrial
                      • Board Type:
                      • Flexible,
                      • HDI,
                      • Hybrid,
                      • Rigid,
                      • Rigid-Flex
                        • Assembly Type:
                        • Mixed,
                        • Surface Mount,
                        • Thru Hole
                          • Soldering Type:
                          • Hand Soldering,
                          • Lead-Free (RoHS),
                          • Leaded Solder,
                          • Reflow Soldering,
                          • Robotic Soldering
                          • Selective Soldering,
                          • Tin-lead Solder,
                          • Wave Soldering,
                          • Industry:
                          • Aerospace and Defense,
                          • Automotive,
                          • Commercial,
                          • Energy,
                          • Industrial,
                          • Lighting,
                          • Marine,
                          • Medical,
                          • Telecom
                          • Aerospace and Defense,
                          • Automotive,
                          • Commercial,
                          • Energy,
                          • Industrial,
                          • Lighting,
                          • Marine,
                          • Medical,
                          • Telecom
                          • Assembly Type:
                          • Mixed,
                          • Surface Mount,
                          • Thru Hole
                            • Board Type:
                            • Flexible,
                            • Rigid,
                            • Rigid-Flex
                              • Assembly Type:
                              • Surface Mount,
                              • Thru Hole,
                              • Mixed
                                • Soldering Type:
                                • Lead-Free (RoHS),
                                • Leaded Solder,
                                • Selective Soldering
                                  • Industry:
                                  • Aerospace and Defense,
                                  • Automotive,
                                  • Commercial,
                                  • Energy,
                                  • Industrial,
                                  • Medical,
                                  • Telecom
                                  • Aerospace and Defense,
                                  • Automotive,
                                  • Commercial,
                                  • Energy,
                                  • Industrial,
                                  • Medical,
                                  • Telecom
                                  • Assembly Type:
                                  • Mixed,
                                  • Surface Mount,
                                  • Thru Hole
                                    • Soldering Type:
                                    • Lead-Free (RoHS),
                                    • Leaded Solder
                                      • Industry:
                                      • Aerospace and Defense,
                                      • Automotive,
                                      • Commercial,
                                      • Energy,
                                      • Industrial,
                                      • Lighting,
                                      • Marine,
                                      • Medical,
                                      • Telecom
                                      • Aerospace and Defense,
                                      • Automotive,
                                      • Commercial,
                                      • Energy,
                                      • Industrial,
                                      • Lighting,
                                      • Marine,
                                      • Medical,
                                      • Telecom
                                      • Board Type:
                                      • Flexible,
                                      • HDI,
                                      • Hybrid,
                                      • Rigid,
                                      • Rigid-Flex
                                        • Assembly Type:
                                        • Mixed,
                                        • Surface Mount,
                                        • Thru Hole
                                          • Soldering Type:
                                          • Hand Soldering,
                                          • Lead-Free (RoHS),
                                          • Leaded Solder,
                                          • Reflow Soldering,
                                          • Robotic Soldering
                                          • Selective Soldering,
                                          • Tin-lead Solder,
                                          • Wave Soldering
                                          • Industry:
                                          • Automotive,
                                          • Commercial,
                                          • Energy,
                                          • Industrial,
                                          • Lighting,
                                          • Marine,
                                          • Medical,
                                          • Telecom
                                          • Automotive,
                                          • Commercial,
                                          • Energy,
                                          • Industrial,
                                          • Lighting,
                                          • Marine,
                                          • Medical,
                                          • Telecom
                                          • Board Type:
                                          • Flexible,
                                          • HDI,
                                          • Hybrid,
                                          • Rigid,
                                          • Rigid-Flex
                                            • Assembly Type:
                                            • Mixed,
                                            • Surface Mount,
                                            • Thru Hole
                                              • Soldering Type:
                                              • Hand Soldering,
                                              • Lead-Free (RoHS),
                                              • Leaded Solder,
                                              • Reflow Soldering,
                                              • Robotic Soldering
                                              • Selective Soldering,
                                              • Tin-lead Solder,
                                              • Wave Soldering,
                                              • Industry:
                                              • Aerospace and Defense,
                                              • Automotive,
                                              • Commercial,
                                              • Energy,
                                              • Industrial,
                                              • Lighting,
                                              • Marine,
                                              • Medical,
                                              • Telecom
                                              • Aerospace and Defense,
                                              • Automotive,
                                              • Commercial,
                                              • Energy,
                                              • Industrial,
                                              • Lighting,
                                              • Marine,
                                              • Medical,
                                              • Telecom
                                              • Board Type:
                                              • Flexible,
                                              • Rigid,
                                              • Rigid-Flex
                                                • Assembly Type:
                                                • Mixed,
                                                • Surface Mount,
                                                • Thru Hole
                                                  • Soldering Type:
                                                  • Hand Soldering,
                                                  • Selective Soldering,
                                                  • Wave Soldering
                                                    • Assembly Type:
                                                    • Surface Mount,
                                                    • Thru Hole
                                                      • Soldering Type:
                                                      • Reflow Soldering
                                                        • Industry:
                                                        • Aerospace and Defense,
                                                        • Automotive,
                                                        • Commercial,
                                                        • Energy,
                                                        • Industrial,
                                                        • Lighting,
                                                        • Marine,
                                                        • Medical,
                                                        • Telecom
                                                        • Aerospace and Defense,
                                                        • Automotive,
                                                        • Commercial,
                                                        • Energy,
                                                        • Industrial,
                                                        • Lighting,
                                                        • Marine,
                                                        • Medical,
                                                        • Telecom
                                                        • Board Type:
                                                        • Flexible,
                                                        • HDI,
                                                        • Hybrid,
                                                        • Rigid,
                                                        • Rigid-Flex
                                                          • Assembly Type:
                                                          • Surface Mount,
                                                          • Thru Hole,
                                                          • Mixed
                                                            • Soldering Type:
                                                            • Hand Soldering,
                                                            • Lead-Free (RoHS),
                                                            • Reflow Soldering,
                                                            • Selective Soldering,
                                                            • Wave Soldering
                                                              • Industry:
                                                              • Aerospace and Defense,
                                                              • Automotive,
                                                              • Commercial,
                                                              • Energy,
                                                              • Industrial,
                                                              • Lighting,
                                                              • Marine,
                                                              • Medical,
                                                              • Telecom
                                                              • Aerospace and Defense,
                                                              • Automotive,
                                                              • Commercial,
                                                              • Energy,
                                                              • Industrial,
                                                              • Lighting,
                                                              • Marine,
                                                              • Medical,
                                                              • Telecom
                                                              • Board Type:
                                                              • Flexible,
                                                              • HDI,
                                                              • Rigid,
                                                              • Rigid-Flex
                                                                • Assembly Type:
                                                                • Surface Mount,
                                                                • Thru Hole,
                                                                • Mixed
                                                                  • Soldering Type:
                                                                  • Hand Soldering,
                                                                  • Lead-Free (RoHS),
                                                                  • Reflow Soldering,
                                                                  • Wave Soldering
                                                                    • Industry:
                                                                    • Automotive,
                                                                    • Industrial
                                                                    • Automotive,
                                                                    • Industrial
                                                                    • Assembly Type:
                                                                    • Thru Hole
                                                                      • Soldering Type:
                                                                      • Reflow Soldering,
                                                                      • Wave Soldering
                                                                        • Industry:
                                                                        • Aerospace and Defense,
                                                                        • Automotive,
                                                                        • Commercial,
                                                                        • Energy,
                                                                        • Industrial,
                                                                        • Lighting,
                                                                        • Marine,
                                                                        • Medical,
                                                                        • Telecom
                                                                        • Aerospace and Defense,
                                                                        • Automotive,
                                                                        • Commercial,
                                                                        • Energy,
                                                                        • Industrial,
                                                                        • Lighting,
                                                                        • Marine,
                                                                        • Medical,
                                                                        • Telecom
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                                                                        Tell us your PCB requirement and let us get you quotes from multiple companies.

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                                                                        • Assembly Type:
                                                                        • Surface Mount,
                                                                        • Thru Hole
                                                                          • Industry:
                                                                          • Aerospace and Defense,
                                                                          • Medical
                                                                          • Aerospace and Defense,
                                                                          • Medical
                                                                          • Assembly Type:
                                                                          • Surface Mount,
                                                                          • Thru Hole,
                                                                          • Mixed
                                                                            • Soldering Type:
                                                                            • Selective Soldering,
                                                                            • Lead-Free (RoHS)
                                                                              • Board Type:
                                                                              • Rigid
                                                                                • Assembly Type:
                                                                                • Surface Mount,
                                                                                • Thru Hole,
                                                                                • Mixed
                                                                                  • Soldering Type:
                                                                                  • Selective Soldering,
                                                                                  • Wave Soldering
                                                                                    • Industry:
                                                                                    • Aerospace and Defense,
                                                                                    • Energy,
                                                                                    • Medical
                                                                                    • Aerospace and Defense,
                                                                                    • Energy,
                                                                                    • Medical
                                                                                    • Board Type:
                                                                                    • Flexible,
                                                                                    • Hybrid,
                                                                                    • Rigid,
                                                                                    • Rigid-Flex
                                                                                      • Assembly Type:
                                                                                      • Mixed,
                                                                                      • Surface Mount,
                                                                                      • Thru Hole
                                                                                        • Soldering Type:
                                                                                        • Hand Soldering,
                                                                                        • Lead-Free (RoHS),
                                                                                        • Leaded Solder,
                                                                                        • Reflow Soldering,
                                                                                        • Tin-lead Solder
                                                                                        • Wave Soldering,
                                                                                        • Industry:
                                                                                        • Aerospace and Defense,
                                                                                        • Automotive,
                                                                                        • Commercial,
                                                                                        • Energy,
                                                                                        • Industrial,
                                                                                        • Lighting,
                                                                                        • Marine,
                                                                                        • Medical,
                                                                                        • Telecom
                                                                                        • Aerospace and Defense,
                                                                                        • Automotive,
                                                                                        • Commercial,
                                                                                        • Energy,
                                                                                        • Industrial,
                                                                                        • Lighting,
                                                                                        • Marine,
                                                                                        • Medical,
                                                                                        • Telecom
                                                                                        • Assembly Type:
                                                                                        • Surface Mount,
                                                                                        • Thru Hole,
                                                                                        • Mixed
                                                                                          • Soldering Type:
                                                                                          • Selective Soldering
                                                                                            • Board Type:
                                                                                            • Hybrid
                                                                                              • Assembly Type:
                                                                                              • Surface Mount,
                                                                                              • Thru Hole,
                                                                                              • Mixed
                                                                                                • Soldering Type:
                                                                                                • Lead-Free (RoHS)
                                                                                                  • Assembly Type:
                                                                                                  • Surface Mount,
                                                                                                  • Thru Hole,
                                                                                                  • Mixed
                                                                                                    • Soldering Type:
                                                                                                    • Wave Soldering,
                                                                                                    • Hand Soldering
                                                                                                      • Board Type:
                                                                                                      • Rigid
                                                                                                        • Assembly Type:
                                                                                                        • Mixed,
                                                                                                        • Surface Mount,
                                                                                                        • Thru Hole
                                                                                                          • Soldering Type:
                                                                                                          • Hand Soldering,
                                                                                                          • Lead-Free (RoHS),
                                                                                                          • Leaded Solder,
                                                                                                          • Reflow Soldering,
                                                                                                          • Wave Soldering
                                                                                                            • Industry:
                                                                                                            • Aerospace and Defense,
                                                                                                            • Automotive,
                                                                                                            • Commercial,
                                                                                                            • Energy,
                                                                                                            • Industrial,
                                                                                                            • Marine,
                                                                                                            • Medical,
                                                                                                            • Telecom
                                                                                                            • Aerospace and Defense,
                                                                                                            • Automotive,
                                                                                                            • Commercial,
                                                                                                            • Energy,
                                                                                                            • Industrial,
                                                                                                            • Marine,
                                                                                                            • Medical,
                                                                                                            • Telecom
                                                                                                            • Assembly Type:
                                                                                                            • Surface Mount,
                                                                                                            • Thru Hole,
                                                                                                            • Mixed
                                                                                                              • Soldering Type:
                                                                                                              • Lead-Free (RoHS),
                                                                                                              • Reflow Soldering,
                                                                                                              • Selective Soldering,
                                                                                                              • Wave Soldering
                                                                                                                • Board Type:
                                                                                                                • Rigid
                                                                                                                  • Assembly Type:
                                                                                                                  • Surface Mount
                                                                                                                    • Soldering Type:
                                                                                                                    • Lead-Free (RoHS),
                                                                                                                    • Reflow Soldering,
                                                                                                                    • Wave Soldering

                                                                                                                    What is Automated Optical Inspection (AOI)?

                                                                                                                    Automated Optical Inspection (AOI) is a machine-based technique used to test and evaluate PCB boards for potential faults like surface defects, dimensional defects, and component placement defects. As circuits become more complex, it has become almost impossible to manually inspect the boards and thus AOI plays an important role in checking printed circuit boards after assembly. It helps to attain the desired product quality in the production line by keeping the cost as low as possible (as it is an automated process).

                                                                                                                    The inspection starts with visual scanning of the board followed by a comparison of a captured image of the board and comparing it to the ideal board image that is input in to the AOI machine.

                                                                                                                    The board is placed under highly illuminated light sources such as fluorescent, LED/ infra-red or ultra-violet lighting with one or more high definition cameras. This is how the AOI machine captures the picture of the PCB board. The AOI machine then matches the captured picture with already installed information through processing software like what the board should look like. After this comparison, AOI highlights the defects. 

                                                                                                                    The AOI is programmed and uses different algorithms for acceptable PCB board standards.

                                                                                                                    What types of defects can be identified during AOI?

                                                                                                                    Surface defects like nodules, scratches and dimensional defects such as open circuits, shorts and thinning of the solder can be detected by AOI. Detection of wrong components, missing components, and incorrectly placed components can also be detected.

                                                                                                                    For a PCB board with components (SMT inspection): Area defects, Billboarding, Component offset, Component polarity, Component presence or absence, Component Skew, Excessive Solder Joints, Flipped component, Height Defects, Insufficient Paste around Leads, Insufficient Solder Joints, Lifted Leads, No Population tests, Paste Registration, Severely Damaged Components, Tombstoning, Volume Defects, Wrong Part, and Solder Bridging.

                                                                                                                    For PCB boards: Line width violations, Spacing violation, Excess copper, Missing pad, Short circuits, Cuts, Hole breakage (whether via is going outside of its pad), and incorrect mounting of components

                                                                                                                    Limitations of AOI: 

                                                                                                                    AOI can only defect surface issues so if there is an internal issue in a multi-layer PCB then AOI will not be able to detect this.

                                                                                                                    Get PCB Assembly Quotes

                                                                                                                    Tell us your PCB requirement and let us get you quotes from multiple companies.

                                                                                                                    Get Quotes Now
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