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LSA Large Area Silicon Sheet Task Continuous Liquid Feed Czochralski GrowthA process for the continuous growth of crystals by the Czochralski method, suitable for producing single silicon crystals for use in solar cells was studied. Continuous growth is the growth of 100 Kg of single silicon crystals, 10 cm in diameter, from one container. A furnace with continuous liquid replenishment of the growth crucible, accomplished by a melt-down system and a liquid transfer mechanism, with associated automatic feedback controls was developed. Elements of the transfer system were further developed and tested during actual transfer runs. Considerable simplification of the heating element of the transfer tube was achieved. Accuracy and reliability of the temperature sensor, which is part of the power input control system for the transfer tube, was improved. Electrical and thermal effectiveness were increased while assembly of the transfer tube system was further simplified.
Document ID
19790012110
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Fiegl, G. (Siltec Corp. Menlo Park, CA, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1979
Subject Category
Engineering (General)
Report/Patent Number
DOE/JPL-954886-79/1
QR-5
NASA-CR-158366
Accession Number
79N20281
Funding Number(s)
CONTRACT_GRANT: JPL-954886
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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