AOI & X-ray Inspection Equipment Advantages

AOI & X-ray Inspection Equipment Advantages

AOI (Auto Optical Inspection), It has been widely used in the circuit board assembly line of the electronics industry, and has replaced the previous manual visual inspection operations.

AOI uses imaging technology, to determine whether the object under test conforms to the standard based on whether there is a large difference, between the object to be measured and the standard image.

Now and In the past Of AOI

Before, AOI was used to detect whether the surface printing of the IC (integrated circuit) package was defective. As the technology evolved, Now it was used to detect the PCB assembly on the quality status of SMT assembly line, or check whether the solder paste meets the standards after printing.

The biggest advantage of AOI is that it can replace the manual visual inspection before and after SMT reflow soldering, and it can judge the shortcomings of SMT assembly assembly more accurately than the human eye.

As with the human eye, AOI can only perform surface inspection of objects, so as long as it is visible on the surface of the object, it can be checked correctly, but for the welding under the part or the edge of the part.

There may be some unsuccessful points. Of course, many AOIs have been able to make multi-angle photography to increase their ability to detect IC sticks and increase the angle of photography of some shielded components to provide more The detection rate, but the effect is always not ideal, it is difficult to achieve 100% test coverage.

Shortcoming of AOI

In fact, the biggest shortcoming of AOI is that some gray scales or shadows are not obvious (prone to false reject), you may use different colors of light to discriminate, but the most troublesome are those covered by other parts...... The rest, Please read Original: www.seamarkxray.com/detecting-advantages-of-aoi-and-x-ray-inspection-equipment

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The difference between the detection equipment AOI & X-RAY