Characterization of Traps in the Transition Region at the HfO2/SiOx Interface by Thermally Stimulated Currents
Artikel i vetenskaplig tidskrift, 2011

Thermally stimulated currents (TSCs) have been measured to investigate electron traps in HfO2 prepared by reactive sputtering on silicon. Broken planes of the silicon crystal, which may contribute to the occurrence of interface states, were identified between the silicon and SiOx interlayer by transmission electron microscopy (TEM). A second domain was found between SiOx and HfO2 constituting a gradual transition region between the two oxides. This interface region was found to be a source of unstable charge traps where captured electrons interact with the silicon energy states through a combined tunneling and thermal process.

dielectric interfaces



generation statistics

border traps

ultrathin hafnium oxide

internal interfaces


gate stacks

oxide-semiconductor capacitors


Bahman Raeissi

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Johan Piscator

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Y. Y. Chen

Chalmers University of Technology

Olof Engström

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

Journal of the Electrochemical Society

0013-4651 (ISSN)

Vol. 158 G63-G70


Elektroteknik och elektronik