Community Research and Development Information Service - CORDIS

Abstract

In this work major aspects of the new crystallization process "Pendant Drop Method" (PDG) for crystalline silicon ribbon-like strips have been investigated. Apparatus and procedure were significantly improved and theoretical considerations led to a stable process as well as the possibility of manufacturing strips thinner than the lip thickness. The study of materials provided an ideal crucible, which is made of graphite with a specific gravity of at least 1.8 and is internally lined with SiC or pyrocarbon. The crucible powder feeding system involving a vibrating bowl has also been markedly improved. A constant rate of output within +- 1.5% is obtained between 1 and 100 g/hr. The response of the crucible to a temperature adjustment is immediate. Ribbons up to 500 mm long and 50 mm wide have been manufactured at an extrusion rate of as much as 90 cm/hr. Actual cost estimates showed that ribbons could be produced at less than 500 FF/m**2. Subsequent research has to be carried out in the following areas : reduction of thickness, automation, study and control of ribbon cooling, deduction of drawing lip external wetting.

Additional information

Authors: RICARD J, PRODUITS CHIMIQUES UGINE KUHLMANN, CENTRE DE RECHERCHES DE GRENOBLE, JARRIE (FRANCE);DUFFAR TH PRODUITS CHIMIQUES UGINE KUHLMANN, CENTRE DE RECHERCHES DE GRENOBLE, JARRIE (FRANCE), PRODUITS CHIMIQUES UGINE KUHLMANN, CENTRE DE RECHERCHES DE GRENOBLE, JARRIE (FRANCE)
Bibliographic Reference: EUR 9864 EN (1985), MF, 123 P., BFR 300, BLOW-UP COPY BFR 615, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124031900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en