Television – Special applications – Manufacturing
Patent
1994-05-02
1997-06-24
Britton, Howard W.
Television
Special applications
Manufacturing
348126, 382146, H04N 718
Patent
active
056421583
ABSTRACT:
This invention provides a method and apparatus for automatically inspecting the connection of a wire to a lead on lead frame containing a semiconductor chip or similar device. Using an image processor to locate the general position of a soldered lead in a digitized image, the present invention creates a template of an idealized optical indentation left by a good bond; determines parameters such as wire angle, idealized position and shape thresholds for applying the template; conducts a normalized correlation search of the digitized image; compares the results returned to the parameters and reports the resulting signals generated by this comparison to a host controller or other control module.
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Garakani Arman
Michael David J.
Petry, III John P.
Britton Howard W.
Cognex Corporation
Stretch Maureen
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