Smart Gui - Algorithm Training Material_rev1.pdf - 第131页

Copyright © ViT rox All Rights Reserved . Lead Ringer - T ypes of Ringer T ests 2. Pad Solder Shape Differs (Pad anchor) • Inspection area: Pad Area • Anchor set to (Lock to Search Area (CAD)" anchor) • Image Plane:…

Lead Ringer - Types of Ringer Tests

1. Pad Too Dark

• Inspection area: Pad Area

• Anchor set to (Lock to Search Area (CAD)" anchor)

• Image Plane: max(Angle 1,Angle 3)

• If the lead is lifted, the end of the pad will look darker in Angle 1, and Angle 3, so we will look at this difference in

intensity to characterize a possible defect

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Lead Ringer - Types of Ringer Tests

2. Pad Solder Shape Differs (Pad anchor)

• Inspection area: Pad Area

• Anchor set to (Lock to Search Area (CAD)" anchor)

• Image Plane: max(Angle 1,Angle 3)

• Compare each lead with its neighbours (per row comparison), with invert check (invert the results if most of the

leads of the row are defects).

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Lead Ringer - Types of Ringer Tests

3. Shoulder Bend Differs

• Anchor set to (Shoulder anchor)

• Image Plane: Angle 1

• Software measure the mean intensity of the pixels contained within the ROI.Compare each lead with its

neighbours (per row comparison), with invert check (invert the results if most of the leads of the row are defects).

• Inspection area: Shoulder Area

• If the lead is lifted (heavily) or bent, the lead will be visibly deformed: the shoulder will appear brighter in the

current region of interest.

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