The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 1976
Filed:
Jun. 28, 1972
Applicant:
Inventor:
Michel Ayel, Caen, FR;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
156620 ; 13DI / ; 2327 / ; 219 1043 ; 2330 / ;
Abstract
In a floating-zone melting process for producing single crystals of a semi-conductor material from a semi-conductor rod and a seed crystal, the rod is heated by high-frequency induction from an inductance coil which is spaced from a short-circuited annular conductor. The spacing between the inductance coil and the short-circuited conductor is varied during passage of the molten zone to correspond with variations in the diameter of the growing crystal.