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Reliability Control in Parallel Gap Welding
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1965 by SAE International in United States
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Parallel gap welding is a reliable method for joining integrated circuit flat-packs to printed circuit assemblies. Keys to the reliability of the process are the proper selection of materials, the inherent precision of the equipment, and the amenability of the welds to visual inspection.
Welds between gold-plated Kovar leads and gold-plated copper-land, glass-epoxy boards were visually inspected, and then either examined metal-lographically or tested for mechanical strength.
Normal distribution and extreme value statistics were used to evaluate the weld strength data. If proper control is exercised, over 10, 000 welded connections must be made to expect one weld with a strength value less than 0.5 pound.
CitationGrobecker, D. and Shackleton, J., "Reliability Control in Parallel Gap Welding," SAE Technical Paper 650854, 1965, https://doi.org/10.4271/650854.
- Dreyer, G. A. “Environmental Testing of Kovar to Copper and Kovar to Nickel Parallel Gap Weldments.” Research Study Contract No. 63-0379, Aerospace Group, Hughes Aircraft Company, Culver City, California, January 1965.
- Schafer R. E. and Yurkowsky, W. “Quantification of Electronic Circuit Connection Techniques.” Technical Document Report No. RADC-TDR-64-46, Rome Air Development Center, January 29, 1964.
- Wrench, G. D. “Private Communication,” July 29, 1965.
- Worthing A. G. and Geffner, J. “Treatment of Experimental Data.” John Wiley and Sons, New York, 1943.
- Gumble, E. J. “Statistical Theory of Extreme Values and Some Practical Applications.” Applied Mathematic Series 33, National Bureau of Standards, February 12, 1954.
- Gumble, E. J. “Probability Tables for the Analysis of Extreme-Value Data (Introduction).” Applied Mathematics Series 22, National Bureau of Standards, July 6, 1953.