Crystal diameter controlling method

Details Crystal diameter controlling method Crystal diameter controlling method

1988-03-28

1990-11-27

Andrews, Melvyn J.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

1566181, C30B 1522

Patent

active

049733770

ABSTRACT:
Disclosed is a method of controlling the diameter of a single crystal produced by the Czochralski method. The diameter of a tapered portion of the single crystal is controlled by controlling the temperature of a melt in a crucible and the rotational speed of the crucible. The control range of the rotational speed of the crucible is made narrower as the diameter of the tapered portion approaches closer to that of a body portion, and the rotational speed is made constant while the body portion is grown.

REFERENCES:
patent: 4710258 (1987-12-01), Latka
patent: 4794263 (1988-12-01), Katsuoka et al.
Patzner et al., SCP and Solid State Technology, pp. 25-30, Oct. 1967.

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