Defect Database Tool (option) > Defect Database Viewer > Search Results > Abnormal Results

Abnormal Results

Sometimes you may see results in the database that do not show defect data. These are rare situations, but can be caused by high part rates, high defect rates, or a heavy processor load on the system. You may also have less space for images in the defect data file than the total number of defect database records over all lanes, so images in the defect data file may already have been overwritten for the oldest records in the defect database.

Stale Data

This happens when the real time processor was busy for too long while the image was pending a write to the hard drive. This condition may happen when there is a high defect rate and a high load on the system. In this case the record exists in the database but the image is not valid because it was never written in the first place.

Recycled Data

This happens for the oldest records in the defect database when their images in the defect data file have been overwritten.

Spilled Record

This happens when the defect record (not image) cannot be written to the hard drive. This may occur if the system is too busy writing images to the hard drive. The screen will indicate how many defect records were spilled during which time interval.