Method and device for asymmetrically coating a tape-shaped carri

Details Method and device for asymmetrically coating a tape-shaped carri Method and device for asymmetrically coating a tape-shaped carri

1983-07-11

1985-08-06

Lawrence, Evan K.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156DIG88, 422246, 427 74, H01L 21208

Patent

active

045334285

ABSTRACT:
A method for continuously manufacturing silicon tapes which are predominantly coated on one side of the carrier, for solar cells. In an exemplary embodiment, a carrier body consisting of a graphite network is conducted vertically upwards through a guide channel situated in the floor of a silicon melt bath and travels through a crystallization region where the molten silicon crystallizes on the carrier body. The surfaces of the guide channel at each side of the carrier path in the vicinity of the crystallization region are wetted by the molten silicon and have different dimensions in a direction at right angles to the carrier path. As a result of the differential in surface tension forces at the two sides of the path, a meniscus is formed which is asymmetrical relative to the channel opening thereby causing asymmetrical coating of the carrier body.

REFERENCES:
patent: 4171991 (1979-10-01), Lindmayer
patent: 4251570 (1981-02-01), Zook
patent: 4252861 (1981-02-01), Heaps et al.
patent: 4430305 (1984-02-01), Kalejs et al.
Belouet "The Growth of Polysilicon Sheets on Carbon Substrates by the RAD Process" Electrochem. Meeting, May 1980, St. Louis USA, Abstract No. 327, pp. 817-818.

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