Ten years of power aging of the same group of submarine cable semiconductor devices
The active devices in the first Bell System transistorized submarine cable system (sf) are unpassivated, diffused-base, germanium transistors and oxide-passivated, silicon diodes. At the date of this writing these devices have accumulated over 550 million device hours of powered operation in service...
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Published in | Bell System Technical Journal Vol. 56; no. 6; pp. 987 - 1005 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Oxford, UK
American Telephone and Telegraph Company
08.07.1977
Blackwell Publishing Ltd |
Online Access | Get full text |
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Summary: | The active devices in the first Bell System transistorized submarine cable system (sf) are unpassivated, diffused-base, germanium transistors and oxide-passivated, silicon diodes. At the date of this writing these devices have accumulated over 550 million device hours of powered operation in service and on the aging rack without failure or impaired device performance for a demonstrated failure rate of less than 0.00045 percent per thousand hours (4.5 fits) with 90-percent confidence. This paper reports details of the behavior of 500 of these devices that have reached ten years of controlled power aging. The overall results indicate that initial reliability objectives are being achieved and that the semiconductor devices should not be expected to limit the desired life span of sf submarine cables. |
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Bibliography: | ark:/67375/WNG-PZHMMBCP-6 istex:54B25A74BB4EA099988D764D3C11226E44037CC6 ArticleID:BLTJ549 |
ISSN: | 0005-8580 2376-7154 1538-7305 |
DOI: | 10.1002/j.1538-7305.1977.tb00549.x |