Reduction of thermal damage in ultrathin gate oxides after intrinsic dielectric breakdown

Isodiana Crupi, Lombardo, Isodiana Crupi, Felice Crupi, La Magna, Gerardi

Risultato della ricerca: Articlepeer review

21 Citazioni (Scopus)

Abstract

We have compared the thermal damage in ultrathin gate SiO2 layers of 5.6 and 3 nm thickness after intrinsic dielectric breakdown due to constant voltage Fowler-Nordheim stress. The power dissipated through the metal-oxide-semiconductor capacitor during the breakdown transient, measured with high time resolution, strongly decreases with oxide thickness. This is reflected in a noticeable reduction of the thermal damage found in the structure after breakdown. The effect can be explained as the consequence of the lower amount of defects present in the oxide at the breakdown instant and of the occurrence of a softer breakdown in the initial spot. The present data allow us to estimate the power threshold at the boundary between soft and hard breakdown, and they are compared to numerical simulations of heat flow. © 2001 American Institute of Physics.
Lingua originaleEnglish
pagine (da-a)1522-1524
Numero di pagine3
RivistaApplied Physics Letters
Volume79
Stato di pubblicazionePublished - 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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