Crucible of fused vitreous silica

Details Crucible of fused vitreous silica Crucible of fused vitreous silica

1973-12-03

1977-04-26

Bashore, S. Leon

Bottles and jars

Ejecting

Siphon type

65 42, 65 54, 65 55, 23273SP, C03B 2320, B65D 2300, B01D 100

Patent

active

040196453

ABSTRACT:
A crucible of pure transparent silica glass or pure translucent or opaque silica glass for the production of monocrystals used in making semiconductor elements which includes a hollow cylindrical part and a welded-on head. The head end of the hollow cylindrical part is formed from a tube with a head margin portion constricted towards the tube axis which is formed by shaping one end of the tube. A plate is welded into the aperture formed by the constricted head margin portion and has an area equal to at least one-tenth and at most four-fifths of the total head area made up by the head margin portion and the head.

REFERENCES:
patent: 1624699 (1927-04-01), Wayringer
patent: 2565061 (1951-08-01), Bednarz
patent: 2822646 (1958-02-01), Kreftt
patent: 3203779 (1965-08-01), Reber
patent: 3215517 (1965-11-01), Zimmermann
patent: 3694165 (1972-09-01), Kramer
patent: 3716345 (1973-02-01), Grabmaier
patent: 3795488 (1974-03-01), Oliver

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