TITLE

Improved performance and reliability for metal-oxide-semiconductor field-effect-transistor with fluorinated silicate glass passivation layer

AUTHOR(S)
Chih-Ren Hsieh; Yung-Yu Chen; Jen-Chung Lou
PUB. DATE
January 2010
SOURCE
Applied Physics Letters;1/11/2010, Vol. 96 Issue 2, p022905
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The superior characteristics of the fluorinated HfO2/SiON gate dielectric are investigated comprehensively. Fluorine is incorporated into the gate dielectric through fluorinated silicate glass (FSG) passivation layer to form fluorinated HfO2/SiON dielectric. Fluorine incorporation has been proved to eliminate both bulk and interface trap densities due to Hf–F and Si–F bonds formation, which can strongly reduce trap generation as well as trap-assisted tunneling during subsequently constant voltage stress, and results in improved electrical characteristics and dielectric reliabilities. The results clearly indicate that the fluorinated HfO2/SiON gate dielectric using FSG passivation layer becomes a feasible technology for future ultrathin gate dielectric applications.
ACCESSION #
47587961

 

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