Printed circuit board projection imaging system

Details Printed circuit board projection imaging system Printed circuit board projection imaging system

1980-07-18

1982-08-31

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

352222, 355 71, 355 77, 355 41, G03B 2752

Patent

active

043469876

ABSTRACT:
A system for projecting an image, via projection optics, from multiple circuits formed on a glass master onto a photoresist coated PCB panel. The projection optics precisely magnifies the reduced pattern formed on the master to full scale while maintaining the image-plane light uniformity. To insure proper magnification, the conjugate distances between the master and the projection optics and between the projection optics and the PCB panel are precisely controlled. Further, the relevant planes containing the master, optics and PCB panel are controlled to insure substantial perpendicularity with respect to the optical axis. A registration subsystem is also provided to register the PCB panelholding platen.

REFERENCES:
patent: 3103850 (1963-09-01), Khoury et al.
patent: 3354806 (1967-11-01), De Lang et al.
patent: 3494695 (1970-02-01), Sollima et al.
patent: 3716298 (1973-02-01), Reardon
patent: 4026653 (1977-05-01), Appelbaum et al.

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