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Proceedings Paper

Computerized Measuring Microscope
Author(s): Thomas D. Schoonmaker
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Paper Abstract

In the manufacturing of printed circuit boards, microscopic analysis is an essential process control activity. An inspector microscopically analyzes board samples to deter-mine board lot quality and process conditions. Prior to computerizing, this sustained measurement-taking involved the tedious process of recording raw data, converting microscope filar readings, calculating averages, logging information in a job notebook, and completing detailed final lab reports. It is evident from this brief task description that this time-consuming repetitious data recording routine was an added burden to the already fatiguing visual inspection method and therefore was a prime candidate for automatic data capture and printout. Secondly, the creation of a permanent and easily accessible data base would improve process feedback and provide for a system with quick identification of any suspect boards if further assembly/testing exhibited board-related failures. This paper describes the evolution and implementation of a computer-aided microscopic inspection operation.

Paper Details

Date Published: 28 May 1980
PDF: 8 pages
Proc. SPIE 0220, Optics in Metrology and Quality Assurance, (28 May 1980); doi: 10.1117/12.958591
Show Author Affiliations
Thomas D. Schoonmaker, General Electric Company (United States)

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

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