Boots – shoes – and leggings
Patent
1983-10-18
1986-05-27
Chin, Gary
Boots, shoes, and leggings
156601, 156617SP, 364162, 364477, 422249, B01D 900, G06G 766, G06G 758
Patent
active
045919941
ABSTRACT:
A method for controlling the shape of a single crystal. The weight of a single crystal pulled by the Czochralski method is detected, to obtain a weight signal W. The weight signal W is differentiated over time, to obtain a differential signal dW/dt. Using the differential signal dW/dt, (A.multidot.dW/dt+B).theta. is computed, to obtain an operation signal f. A and B are parameters which are determined by predetermined manufacturing conditions of the Czochralski method, and .theta. is a preset growing angle of the single crystal. The operation signal f is integrated over time, to obtain an integral signal F. The integral signal F and the differential signal dW/dt are compared to obtain a deviation signal. The heating power supplied to the crucible is controlled by use of the deviation signal, to keep the growing angle of the single crystal constant.
REFERENCES:
patent: 3934983 (1976-01-01), Bardsley et al.
patent: 4008387 (1977-02-01), Green et al.
patent: 4032389 (1977-06-01), Joyce
patent: 4073355 (1978-02-01), Schmidt et al.
patent: 4234376 (1980-11-01), Linares
patent: 4239583 (1980-12-01), Hatch et al.
patent: 4258003 (1981-03-01), Hurle et al.
patent: 4397813 (1983-08-01), Washizuka et al.
Japanese Utility Model Publication (Kokoku) No. 54-4345 K. Takaji et al., Mar. 6, 1979.
J. Crystal Growth 19 (1973), 187-192, A. E. Zinnes et al.
J. Crystal Growth 40 (1977) 21-28, W. Bardsley.
Matsumura Sadao
Washizuka Syoichi
Chin Gary
Cosimano Edward R.
Tokyo Shibaura Denki Kabushiki Kaisha
LandOfFree
Method and apparatus for controlling shape of single crystal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for controlling shape of single crystal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for controlling shape of single crystal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1574702