Doping profiles characterization in GaAs semi‐insulating substrates using capacitance–voltage, conductance–voltage, and current–voltage measurements
作者:
K. Iniewski,
M. Liu,
C. A. T. Salama,
期刊:
Journal of Vacuum Science&Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
(AIP Available online 1994)
卷期:
Volume 12,
issue 1
页码: 327-331
ISSN:1071-1023
年代: 1994
DOI:10.1116/1.587162
出版商: American Vacuum Society
关键词: GALLIUM ARSENIDES;DOPING PROFILES;CV CHARACTERISTIC;IV CHARACTERISTIC;GATES;SCHOTTKY BARRIER DIODES;FIELD EFFECT TRANSISTORS;CAPACITANCE;GaAs
数据来源: AIP
摘要:
An accurate doping profile extraction in devices fabricated in semi‐insulating GaAs substrates is difficult. The conventional Schottky barrier diodeC–Vtechnique is prone to large errors caused by bias dependent series resistance, gate current conduction, deep‐level traps, and breakdown of the depletion approximation. It is shown that using both ac admittance (G–VandC–V) and dc (I–V) measurements of Schottky barrier diode the doping profile can be extracted more accurately and the range of accurate measurements can be clearly established. The characterization procedure has been verified experimentally using devices fabricated in a commercial 1 μm GaAs process.
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