Method of manufacturing high-purity silicon rods having a...

Details Method of manufacturing high-purity silicon rods having a... Method of manufacturing high-purity silicon rods having a...

C - Chemistry, Metallurgy

01

B

117/85, 148/2.3

C01B 33/02 (2006.01) C01B 33/035 (2006.01) C23C 16/22 (2006.01) C23C 16/44 (2006.01)

Patent

CA 1098011

TITLE OF INVENTION METHOD OF MANUFACTURING HIGH-PURITY SILICON RODS HAVING A UNIFORM SECTIONAL SHAPE ABSTRACT OF THE DISCLOSURE A method of manufacturing high-purity silicon rods having a uniform sectional shape by thermally decomposing monosilane on a plurality of rod-shaped silicon carrier members which have been red-heated by directly passing an electric current therethrough, said silicon carrier members being thermally insulated from one another, characterized in that monosilane is supplied into a pyrolysis container through multi-stage monosilane supply ports located in parallel with the axes of said silicon carrier members held vertically within the pyrolysis container, and that the amount of supply of monosilane through the upper supply ports is increas- ed as compared with that through the lower supply ports in res- ponse to the increase of the diameter of each of said silicon rods.

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