Capacitance Energy Level Spectroscopy of Deep‐Lying Semiconductor Impurities Using Schottky Barriers
作者:
G. I. Roberts,
C. R. Crowell,
期刊:
Journal of Applied Physics
(AIP Available online 1970)
卷期:
Volume 41,
issue 4
页码: 1767-1776
ISSN:0021-8979
年代: 1970
DOI:10.1063/1.1659102
出版商: AIP
数据来源: AIP
摘要:
The capacitance‐voltage (C‐V) relationship of a Schottky barrier diode is predicted for an energy distribution of impurity levels having spatially uniform concentration in ann‐type semiconductor. The model applies for forward and reverse bias voltages at modulation frequencies near dc and at modulation frequencies at which one or more of the deep doping levels cannot respond. Effects of partial ionization of impurity species and the effect of electrons in the depletion region are considered. It is predicted that the diode [d(1/C)/dV] versusVrelationship exhibits sharp minima when the barrier height minus the applied bias is equal to the energy level relative to the conduction band edge of any of the predominant deep‐lying impurities in the semiconductor. The way in which deep lying impurities consequently affect aC‐Vimpurity profile analysis is discussed.
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