impact ionization


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impact ionization

[′im‚pakt ‚ī·ə·nə′zā·shən]
(electronics)
Ionization produced by the impact of a high-energy charge carrier on an atom of semiconductor material; the effect is an increase in the number of charge carriers.
References in periodicals archive ?
The quantitative analysis was done by using gas chromatography-mass spectrometry instrument (GC-MS-QP2010, Shimadzu, Japan) in the electron impact ionization (EI) mode.
The first is the bulk photovoltaic effect involving hot carriers and second is the strong screening field, which leads to impact ionization and multiplication of these carriers, increasing the quantum yield.
During the study of breakdown voltage, impact ionization is one of the important parameters on which the breakdown voltage depends, is strongly related to the distribution of electric field in the drift region [10].
the Tunneling Field Effect Transistor (TFET), vertical Impact Ionization MOSFET (vertical I-MOS), and lateral Impact Ionization MOSFET (lateral I-MOS).
However, at the relatively low energies of solar photons, subtleties related to electron motion largely prevent the exciton-to-electron energy transfers, so only negligible impact ionization occurs, Nozik notes.
This so-called impact ionization in creases overall efficiency by as much as 35 percent, the researchers say.
Analytical methods to detect volatile NA are based on gas chromatography (GC) with a thermal energy analyser (TEA) [16, 21, 22], with mass spectrometry (MS) by electron impact ionization (EI) [23-25], and with mass spectrometry by chemical ionization [26-29].
Simple and Compact Options Wanted Computer control 66% Benchtop 57% Electron impact ionization 39% Continuous analysis 29% Dual filaments 29% Atmospheric pressure ionization 26% Interchangeable ion sources 23% Direct desorption probe 20% Error messages 19% Automated sample prep 17% Onboard electronics 16% Preprogrammed analysis 16% Signal preamplifier 14% UHV chamber 14% Energy-selected mass analysis 13% Collision-induced dissociation 13% Digitizer 11% IEEE-488 11% Laser photoionization 10% Source: R&D Magazine Note: Table made from bar graph.
If a positive DC voltage slightly less than the avalanche breakdown voltage is applied to the N-side of the diode, and an AC voltage is superimposed, then as the AC voltage increases to its maximum value, a large pulse of electron-hole pairs is generated near the P/N junction as the junction electric field reaches a strength sufficient to cause impact ionization.
The second part presents new devices based upon impact ionization near to the source junction, the modeling of charge transport in nano-scale SOI MOSFETs, the electrical properties of SOI MOSFETs with LaLuO3 high-k gate dielectric and the study of neutron effects upon the behavior of nanometer-scale SOI devices.
Electron and photon impact ionization and related topics 2002; proceedings of the international conference, Metz, 18-20 July 2002.
157), might exhibit the effect, called impact ionization.