Apparatus for making quartz glass crucibles

Details Apparatus for making quartz glass crucibles Apparatus for making quartz glass crucibles

1989-10-02

1990-10-16

Schor, Kenneth M.

Glass manufacturing

Means shaping preform from granular material with fusion means

65 181, 65302, 65157, 249141, 425425, 425435, 425812, C03B 1904, C03B 1906

Patent

active

049631780

ABSTRACT:
A flat-bottomed quartz glass crucible for the manufacture of monocrystalline silicon is made by disposing granular quartz particles on a flat base in a cylindrical mold. A vacuum is drawn on the particles through vacuum holes in the base to retain the particles on the base while the base and mold are rotated, and while the particles are heated to fuse them into a quartz glass crucible shape.

REFERENCES:
patent: 2026940 (1936-01-01), Hendryx
patent: 3038199 (1962-06-01), Bartow
patent: 3804566 (1974-04-01), Kimura
patent: 3994659 (1976-11-01), Takahashi
patent: 4266925 (1981-05-01), Book
patent: 4370294 (1983-01-01), Franken
patent: 4416680 (1983-11-01), Bruning
patent: 4740145 (1988-04-01), Shurman

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