Process for producing large-size, self-supporting plates of sili

Details Process for producing large-size, self-supporting plates of sili Process for producing large-size, self-supporting plates of sili

1976-11-19

1978-12-26

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 27, 264 60, 264 81, 264 85, 423348, 423349, 427 86, H01L 21205

Patent

active

041316592

ABSTRACT:
Process for producing large-size, self-supporting plates of silicon deposd from the gaseous phase on a substrate body, which comprises heating a graphite substrate to deposition temperature of silicon, which is deposited on the substrate from a gaseous compound to which a dopant has been added until a layer of about 200 to 650 .mu.m has formed, subsequently melting 40-100% of this layer from the free surface downward, resolidifying the molten silicon by adjustment of a temperature gradient from the substrate body upward, and finally separating the silicon therefrom. The plates so formed are used primarily for making solar cells.

REFERENCES:
patent: 3063811 (1962-11-01), Kniepkamp et al.
patent: 3160521 (1964-12-01), Ziegler et al.
patent: 3160522 (1964-12-01), Heywang et al.
patent: 3549411 (1970-12-01), Bean et al.
patent: 3565674 (1971-02-01), Boland et al.
patent: 3900540 (1975-08-01), Robba et al.
patent: 3969163 (1976-07-01), Wakefield
patent: 4027053 (1977-05-01), Lesk

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