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Title: Role of anode hole injection and valence band hole tunneling on interface trap generation during hot carrier injection stress
Keywords: Gates (Transistor)
Interfaces (Materials)
Hot Carriers
Electron Traps
Issue Date: 2006
Publisher: IEEE
Citation: IEEE Electron Device Letters 27(7), 585-87
Abstract: Interface trap (NIT) generation and recovery due to broken ≡Si-H bonds at the Si/SiO2 interface is studied during and after hot carrier injection (HCI) stress and verified by a two-dimensional reaction-diffusion model. NIT generation and recovery characteristics do not correlate with channel hot electron (HE) density distribution (verified by Monte Carlo simulations). Anode hole injection, which is triggered by HE injection into the gate poly, and valence band hole tunneling, which is triggered for thinner oxides, must be invoked to properly explain experimental results. The observed hole-induced, not electron-induced, breaking of ≡Si-H bonds during HCI stress is also consistent with that for negative bias temperature instability stress.
ISSN: 0741-3106
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