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Accurate alignment of laminate materials using sensor-based robot techniques

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4 Author(s)
Brennemann, A.E. ; IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA ; Hammer, Robert ; Hollis, R.L. ; Jecusco, W.V., II

Assembly accuracies of 0.05-0.1 mm, needed for electronic product manufacture, are attainable with current automated manufacturing equipment. Aggressive electronic system designs will require manufacturing accuracies in the range of 0.005-0.01 mm. A system and strategy is described here to fabricate circuit boards requiring alignment accuracies of 7.5 μm using existing automation equipment with enhancements and typical manufacturing line fixtures. The system, configured as a pilot workcell, consisted of an IBM 7576 coarse positioning robot, a fine positioning manipulator, an optical sensing system and a unique bracing method to reduce environmental disturbances. The strategy was to use a coarse/fine placement technique with sensing to align, stack and bond individual test laminates with patterns of 100 μm holes. The results showed that pairs of holes were consistently aligned to 2-5 μm which surpasses the 7.5 μm manufacturing requirement

Published in:

Robotics and Automation, 1994. Proceedings., 1994 IEEE International Conference on

Date of Conference:

8-13 May 1994