Light exposure installation of a double-sided printed circuit pl

Photocopying – Contact printing – Step and repeat

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Details

355 26, 355 72, 355 75, G03B 2704

Patent

active

059952059

ABSTRACT:
The invention relates to a light exposure installation of a double-sided printed circuit plate through a first and a second artwork equipped with a location mark. It includes a first (10) and a second fixed supporting structure in a horizontal plane, a first and a second support of the first and second artworks (12), optical means for detecting the positioning errors between said circuit and said first and second supports, means for moving perpendicularly to its plane, one of said supports towards the other support, means (26, 28) arranged outside the unit made up of said supports and said circuit to maintain said circuit fixed in its plane with respect to said supporting structure; and means (20, 22) for moving independently said first support (12) with respect to said circuit and said second support with respect to said circuit depending on the detected positioning errors.

REFERENCES:
patent: 4827316 (1989-05-01), Brown
patent: 5272502 (1993-12-01), Saiki
patent: 5337151 (1994-08-01), Baxter et al.
patent: 5403684 (1995-04-01), Schroeder et al.
patent: 5548372 (1996-08-01), Schroeder et al.

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