28 May 1980 Automated Optical Inspection Of Multilayer Printed Circuit Boards
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Proceedings Volume 0220, Optics in Metrology and Quality Assurance; (1980) https://doi.org/10.1117/12.958586
Event: 1980 Los Angeles Technical Symposium, 1980, Los Angeles, United States
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.
© (1980) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
William A. Bentley, William A. Bentley, } "Automated Optical Inspection Of Multilayer Printed Circuit Boards", Proc. SPIE 0220, Optics in Metrology and Quality Assurance, (28 May 1980); doi: 10.1117/12.958586; https://doi.org/10.1117/12.958586
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