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Proceedings Paper

Automated Optical Inspection Of Multilayer Printed Circuit Boards
Author(s): William A. Bentley
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Paper Abstract

The Inspectron is an instrument which will perform an automatic optical inspection of the etched circuitry on the individual layers of a multilayer printed circuit board. The concept of this instrument is unique in that it does not compare the PCB under test with a master or with computer-stored data. Instead, as the board is optically scanned, a small area is re-imaged onto a detector array. The detector signals, after digitization, are fed into high-speed logic circuitry which is programmed to distinguish between the appearance of a good board and an error. An 8 x 10 inch board can be inspected for line width, line spacing, line breaks, excess copper, and voids in about a minute. The Inspectron can also inspect pads for completeness and ground planes for shorts.

Paper Details

Date Published: 28 May 1980
PDF: 8 pages
Proc. SPIE 0220, Optics in Metrology and Quality Assurance, (28 May 1980); doi: 10.1117/12.958586
Show Author Affiliations
William A. Bentley, Cooper Industries (United States)


Published in SPIE Proceedings Vol. 0220:
Optics in Metrology and Quality Assurance
Harvey L. Kasdan, Editor(s)

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