Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1981-04-27
1982-09-21
Garris, Bradley
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156617SP, C30B 1526, C30B 1530
Patent
active
043505570
ABSTRACT:
The circumference of a crystal rod is monitored and controlled during the rod growing process by providing relative rotation between the growing crystal rod and a melt of the crystal material as the rod is being pulled from the melt according to the Czochralski method, and by using a radiation-sensitive control system for adjusting growth conditions of the rod in response to variations in a radiation signal which is indicative of the circumferential dimension of the rod. An electronic circuit integrates the radiation signal over each complete rotation of the rod, thereby eliminating unnecessary adjustment of the growth conditions in response to diametric variations of the rod which recur regularly in each rotation.
REFERENCES:
patent: 3621213 (1976-11-01), Jen et al.
patent: 3692499 (1972-09-01), Andrychuk
patent: 3740563 (1973-06-01), Reichard
patent: 3998598 (1976-12-01), Bonora
"Infrared TV System of Computer Controlled Czochralski Crystal Growth"; J. of Crys. Grow.; 13/14; pp. 624-628; 5/72.
Cole John L.
Scholl Richard A.
Crowley Richard P.
Ferrofluidics Corporation
Garris Bradley
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