TDDB is an initialism that may refer to:
- Tentera Darat Diraja Brunei, Malay for Royal Brunei Land Force
- Time-dependent dielectric breakdown (or Time-dependent gate oxide breakdown), a failure mechanism in MOSFETs, when the gate oxide breaks down as a result of long-time application of relatively low electric field (as opposite to immediate breakdown, which is caused by strong electric field)
This disambiguation page lists articles associated with the title TDDB.
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