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:
Aug. 11, 2020
Filed:
Jan. 24, 2017
Siltronic Ag, Munich, DE;
Thomas Schroeck, Kastl, DE;
Thomas Aubrunner, Tacherting, DE;
SILTRONIC AG, Munich, DE;
Abstract
The diameter (d) of a cylindrical section and of an end cone of a single crystal being pulled from a melt in a crucible, is determined by measuring the diameter (d) of the single crystal at an interface with the melt while taking into account a lowering rate (v) of a surface of the melt relative to the crucible, a lifting rate (v) with which the crystal is raised relative to the crucible, and a conservation of mass, wherein a diameter of a cylindrical section of the single crystal, determined by means of observing a bright ring on the surface of the melt, and is used for a correction, a plausibility check or a comparison of the diameter (d) of the single crystal.