Method for inspecting a BGA joint

Details Method for inspecting a BGA joint Method for inspecting a BGA joint

2006-03-14

2006-03-14

Ahmed, Samir (Department: 2623)

Image analysis

Applications

Manufacturing or product inspection

C382S150000, C378S022000

Reexamination Certificate

active

07013038

ABSTRACT:
An inspection method utilizing vertical slice imaging. A number of horizontal slice images, extending through an object of interest, are acquired. A vertical region of interest is defined from the data representing the horizontal slice images. A vertical slice image is constructed based upon the horizontal slice image data falling within the vertical region of interest. The vertical slice image data may be analyzed to detect defects. In addition, a method is provided to detect defects in a BGA joint. The method includes locating a center of the joint. The method may further include measuring a number of diameters through the center of the joint and applying a rule to compare the measured diameters to an expected diameter.

REFERENCES:
patent: 5015956 (1991-05-01), Jensen
patent: 5097492 (1992-03-01), Baker et al.
patent: 5719952 (1998-02-01), Rooks
patent: WO 99/42818 (1999-08-01), None

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