PRODUCTION ENGINEERING MEASURE FOR IMPROVED RELIABILITY OF SOLID ELECTROLYTE TANTALUM CAPACITORS.
Quarterly rept. no. 2, 29 Sep-29 Dec 63
SPRAGUE ELECTRIC CO NORTH ADAMS MASS
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The manufacturing of experimental lots of the 330 microfarads-6 V rating proceeded on schedule. Early indications have shown that the quality of this rating was improved through the use of a special tantalum powder. Mechanization of the assembly operation progressed to the point of completing construction on approximately one half of the equipment. Further design work was done on the fixtures remaining to be built. Life testing was started on all experimental lots which completed production at Concord. No catastrophic failures have occurred on either the 85C test or the 125C test as of the end of this reporting period. However, failures due to leakage current drift occurred to a varying degree on initial lots completing 1000 hours of the mildly accelerated life test of 125C and rated voltage. Author