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:
Apr. 27, 2021
Filed:
Feb. 13, 2018
Siltronic Ag, Munich, DE;
Thomas Schroeck, Kastl, DE;
Siltronic AG, Munich, DE;
Abstract
A single crystal is pulled by an FZ method, in which a polycrystal is melted by means of an electromagnetic melting apparatus and then recrystallized, wherein a first phase (P) a lower end of the polycrystal, which is moved toward the melting apparatus, is melted by the melting apparatus to form a drop, and in a second phase (P) a monocrystalline seed is attached to the lower end of the polycrystal and is melted beginning from an upper end of the seed, where a power (P) of the melting apparatus during the first phase (P) and during the second phase (P) is predetermined at least temporarily in dependence on a temperature and/or geometrical dimensions of crystal material used which comprises the drop and/or the seed and/or the polycrystal.