SMT, PCB Electronics Industry News

CeTaQ Now Offers Accuracy Validation of AOI Systems

Oct 15, 2008

BEDFORD, NH � October 2008 � CeTaQ, the leader in quality analysis and optimization of SMT production processes, announces that it offers accuracy of automated optical inspection (AOI) systems.

Inline AOI systems are used for inspection, verification and measurement after component placement or reflow. Generally, AOI systems provide a fast visual inspection, and typically are placed in the production line. AOI basically surveys the surface of its programmed area and records visual data about the board. It is exactly as its name implies � an optical inspector.

These systems offer high-speed automated visual inspection, but because of speed demands, they are low resolution (typically �30 �m accuracy). As measurement systems, their accuracy should be controlled and proven frequently.

By using a highly accurate glass board, it is possible to control the repeatability and global accuracy of the AOI system along X and Y directions. The grid of fiducials etched on the glass board is analyzed at least 20 times at 0� and 180�. With the deviation calculated between values from the AOI system, it is possible to determine the capability of the AOI system. The measurement values are imported and presented statistically and graphically in CeTaQ's CmCStat software.

Depending on the results, it typically is possible to calibrate the AOI system or input offset values to compensate discrepancies (especially parallelism problems).

Visit for more information about the company's AOI performance validation process.

About CeTaQ

Headquartered in Germany, CeTaQ GmbH provides a unique combination of products and services throughout world for measuring accuracy and repeatability. As a result, CeTaQ has become highly recognized as the leader in machine capability knowledge and as one of the most desired partners within the last several years in Europe, the Americas and overseas. For more information, visit the company's Web site at

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