Printed circuit board inspection apparatus and method

Details Printed circuit board inspection apparatus and method Printed circuit board inspection apparatus and method

1997-08-28

2000-11-21

Rao, Andy

Television

Special applications

Manufacturing

348 95, 348 94, 348 86, 348 87, H04N 718

Patent

active

061510637

ABSTRACT:
A printed circuit board inspection apparatus having upper and lower jigs with the former moveable horizontally and the latter movable vertically and with a camera mounted on the former. Reference holes are provided on the upper jig and on a positioning plate mounted on the lower jig and, in accordance with the method of the invention, photographs are taken of the reference marks simultaneously with the positioning plate engaging the upper jig. Reference mark alignment is calculated from the photographs and the upper jig is moved horizontally to correct misalignment.

REFERENCES:
patent: 4357575 (1982-11-01), Uren et al.
patent: 4571542 (1986-02-01), Arai
patent: 4820975 (1989-04-01), Diggle
patent: 5206820 (1993-04-01), Ammann et al.
patent: 5537050 (1996-07-01), Haruta et al.
patent: 5742701 (1998-04-01), Takano et al.
Prior Art Report by Hideo Nishikawa, Unpublished, Included with application; Nov. 27, 1997.

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