Silicon sheet growth by the inverted Stepanov technique. Final report, March 22, 1976--May 31, 1977
The feasibility of growing silicon ribbons by the inverted ribbon growth process has been established using both nonwetting boron nitride (BN) dies as well as wetting composite dies coated with chemical vapor deposited silicon nitride (CVD Si/sub 3/N/sub 4/). The former can be termed as the inverted Stepanov process, the latter as the inverted edge-defined film-fed growth (EFG) process. Flat die and V-shaped crucible-die configurations have been employed. The shift of the die material from nonwetting BN to nonwetting SiO/sub 2/ was more difficult than anticipated. The V-shaped susceptor has been modified to decrease the vertical gradient inside the susceptor in order to minimize the SiO formation and the related hysteresis. Preliminary evaluation of the reactivity of liquid silicon with CVD Si/sub 3/N/sub 4/ and CVD Si/sub 3/O/sub x/N/sub y/ indicaped that these materials are considerably more resistant to reaction with and/or dissolution in silicon than other materials examined to date. Silicon ribbon growth was carried out using CVD Si/sub 3/N/sub 4/ coated composite dies in the V-shaped crucible-die configuration. A one-dimensional heat flow model has been developed to simulate numerically the major thermal aspects of the inverted Stepanov growth process.
- Research Organization:
- RCA Labs., Princeton, N.J. (USA)
- DOE Contract Number:
- NAS-7-100-954465
- OSTI ID:
- 5078255
- Report Number(s):
- DOE/JPL/954465-2; PRRL-77-CR-22
- Country of Publication:
- United States
- Language:
- English
Similar Records
Silicon sheet growth by the Inverted Stepanov Technique. Quarterly report No. 1, March 22, 1976--June 30, 1976
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Related Subjects
36 MATERIALS SCIENCE
SILICON
CRYSTAL GROWTH
DIES
EVALUATION
FABRICATION
FEASIBILITY STUDIES
SHEETS
SILICON NITRIDES
SILICON SOLAR CELLS
THERMAL ANALYSIS
DIRECT ENERGY CONVERTERS
ELEMENTS
NITRIDES
NITROGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PNICTIDES
SEMIMETALS
SILICON COMPOUNDS
SOLAR CELLS
140501* - Solar Energy Conversion- Photovoltaic Conversion
360601 - Other Materials- Preparation & Manufacture