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Large area silicon sheet by EFGThe influence of parameters such as CO2 concentration, gas flow patterns, quartz in the bulk melt, melt doping level and growth speed on ribbon properties was examined for 10 cm wide ribbon. Ribbon quality is optimized for ambient CO2 in argon concentrations in the range from 1000 to 5000 ppm. Cell performance degrades at CO2 concentrations above 5000 ppm and IR interstitial oxygen levels decrease. These experiments were done primarily at a growth speed of 3.5 cm/minute. Cartridge parameters influencing the ribbon thickness were studied and thickness uniformity at 200 micrometers (8 mils) has been improved. Growth stability at the target speed of 4.0 cm/minute was improved significantly.
Document ID
19820002624
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Date Acquired
September 4, 2013
Publication Date
September 11, 1981
Subject Category
Energy Production And Conversion
Report/Patent Number
JPL-9950-591
NASA-CR-164881
DOE/JPL-954355-81/18
Accession Number
82N10497
Funding Number(s)
CONTRACT_GRANT: JPL-954355
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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