Electronics Assembly Knowledge, Vision & Wisdom
Optical Inspection from AOI and AVI Machines
Optical Inspection from AOI and AVI Machines
AOI and AVI machines are different machines with different functions. This paper analyses the combination factors of AOI and AVI and the inspection objective.
Analysis Lab

Authored By:
Adams Yin
Gardien ATT, Taiwan
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Transcript
Optical Inspection has been grown rapidly in past decades. It is now playing an important role in the manufacturing process.

Most manufacturers are now using AOI machines to report defects on boards after photo-printing or etching.

On the other hand, AVI or (Automated Vision Inspection), sometimes also called FVI (Final Vision Inspection) is growing in a relatively fast pace, but not yet widely used in the industry.

AOI and AVI machines are different kind of machines with different functions, but their working principles are very similar. Many technologies of AVI are built up from AOI.

This paper analyses the combination factors of AOI and AVI which allows us to meet the inspection objective.
Summary
In PCB industry, Optical Inspection has been grown rapidly in past decades. It is now playing an important role in manufacturing process. Most manufacturers are now using AOI machines to report defects on boards after photo-printing or etching. On the other hand, AVI (Automated Vision Inspection) which sometimes also called FVI (final vision inspection) is growing in a relatively fast pace, but not yet widely used in the industry.

AOI and AVI machines are different kind of machines with different functions, but their working principles are very similar. Many technologies of AVI are built up from AOI. This paper analyses on the combination factors of AOI and AVI to meet the inspection objective.

There are 3 parts in this paper. The first part focuses on the application of AOI and AVI and identifies all kinds of defects and boards which they can inspect. The second part compares the hardware and software of AOI and AVI machines. The commons and differences are found out. The third part studies of finding defects under the application and machine issues of AOI and AVI.

The PCB manufacturers are now using AOI and AVI machines to ensure the quality of their boards. Both machines are using cameras to visually find the defects.
Initially Published in the IPC Proceedings
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