Electrical property studies of oxygen in Czochralski-grown neutron-transmutation-doped silicon

Technical Report · Wed Oct 01 04:00:00 EDT 1980

DOI:https://doi.org/10.2172/6154785· OSTI ID:6154785

Cleland, J W; Fukuoka, N

Electically active oxygen-related donors can be formed in Czochralski (Cz) Si either during crystal growth or during subsequent heat treatment; conventional n- or p-type dopant carrier concentrations are altered if these oxygen donors are present. Neutron transmutation doping (NTD) has been used to introduce a uniform concentration of /sup 31/P in Si. However, oxygen donors can also be formed in NTD Cz Si during the process of annealing to remove NTD radiation damage. In the present experiments, the carrier concentration of Cz and NTD Cz Si samples was determined as a function of the initial dopant, oxygen, and /sup 31/P concentration before and after isothermal or isochronal annealing. It is shown that low temperature (350 to 500/sup 0/C) heat treatment can introduce a significant oxygen donor concentration in Cz Si and in NTD Cz Si that contains radiation-induced lattice defects. Intermediate temperature (550 to 750/sup 0/C) heat treatment, which is intended to remove oxygen donors or lattice defects, can introduce other oxygen donors; annealing above 750/sup 0/C is required to remove any of these oxygen donors. Extended (20 h) high-temperature (1000 to 1200/sup 0/C) annealing can remove oxygen donors and lattice defects, but a significant concentration of oxygen donors can still be introduced by subsequent low temperature heat treatment. These results suggest that oxygen-related donor formation in NTD Cz Si at temperatures below 750/sup 0/C may serve to mask any annealing study of lattice defects. It is concluded that annealing for 30 min at 750/sup 0/C is sufficient to remove radiation damage in NTD Cz Si when the separate effects of oxygen donor formation are included.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6154785
• Report Number(s): CONF-800877-3; ON: DE81028143
• Country of Publication: United States
• Language: English

Related Subjects

656102* -- Solid State Physics-- Superconductivity-- Acoustic
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Magnetic
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& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
BARYONS
CRYSTAL DEFECTS
CRYSTAL GROWTH
CRYSTAL STRUCTURE
DATA
ELEMENTARY PARTICLES
ELEMENTS
EXPERIMENTAL DATA
FERMIONS
HADRONS
HEAT TREATMENTS
HIGH TEMPERATURE
IMPURITIES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MEDIUM TEMPERATURE
NEUTRONS
NONMETALS
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
OXYGEN
PHOSPHORUS 31
PHOSPHORUS ISOTOPES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SEMIMETALS
SILICON
STABLE ISOTOPES
TRANSMUTATION