Method of and apparatus for the drawing of bars of monocrystalli

Details Method of and apparatus for the drawing of bars of monocrystalli Method of and apparatus for the drawing of bars of monocrystalli

1984-06-07

1986-03-11

Bernstein, Hiram H.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156617M, 422249, C30B 1514

Patent

active

045754012

ABSTRACT:
High-purity silicon bars can be produced by electrically melting a portion of a mass of silicon granules in a crystal so that the mass around the melt isolates the melt from the crucible wall and thereby prevents contamination of the melt from the crucible and softening of the crucible wall by the melting heat. The current flow is promoted by the heating of the silicon granules and/or electrodes and a seed can be lowered into the melt so that a bar can be withdrawn therefrom for cutting up into wafers for use in the production of semiconductors.

REFERENCES:
patent: 3160497 (1964-12-01), Loung
patent: 3261722 (1966-07-01), Keller et al.
patent: 4116642 (1978-09-01), Chu et al.
patent: 4133969 (1979-01-01), Zumbrunnen
patent: 4165361 (1979-08-01), Milstein

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