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Reliability Control in Parallel Gap Welding
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English
Abstract
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.
Authors
Citation
Grobecker, D. and Shackleton, J., "Reliability Control in Parallel Gap Welding," SAE Technical Paper 650854, 1965, https://doi.org/10.4271/650854.Also In
References
- 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. 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. 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