Methods and apparatuses for in-line solder paste inspection

Details Methods and apparatuses for in-line solder paste inspection Methods and apparatuses for in-line solder paste inspection

1998-12-15

1999-11-09

Tadayon, Bijan

Image analysis

Histogram processing

382145, G06K 900

Patent

active

059829273

ABSTRACT:
Inspection of solder paste on a printed circuit board using a histogram of an image before printing (pre-application image) to normalize an image after printing of the printed circuit board (post-application image) is described. Existing lighting and optics used for alignment of the screen-printing stencil to the printed circuit board are used for the solder paste inspection.

REFERENCES:
patent: 4672667 (1987-06-01), Scott et al.
patent: 5471880 (1995-12-01), Lang et al.
patent: 5889951 (1999-03-01), Lombardi

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