Accession Number:
ADA055198
Title:
Deep Level Trap Spectroscopy of Gallium Arsenide.
Descriptive Note:
Master's thesis,
Corporate Author:
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
Personal Author(s):
Report Date:
1978-03-01
Pagination or Media Count:
82.0
Abstract:
Trapping states in epitaxial GaAs induced by 1 MeV electron irradiation were measured by transient capacitance. N-type epitaxial GaAs samples with buffer layer were irradiated at room temperature with 1 MeV electrons, at doses ranging from 10 to the 14th powersq.cm to 10 to the 16th powersq.cm. Carrier removal, changes of concentration profile, diode behavior, and C-V characteristics were measured as a function of electron dose. Transient capacitance spectroscopy techniques were used to measure deep trapping levels between 4 K and 450 K. Concentrations of trapping states as a function of electron dose were measured and related to the carrier concentration measurements. The usual electron-induced trapping states with significant variations were noted. Variations of spatial depth of the traps as a function of irradiation and thermal cycling were observed. Samples were in the form of FET test patterns for correlation of material properties and device performance. Author
Descriptors:
Subject Categories:
- Solid State Physics