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:
Sep. 04, 2012
Filed:
Dec. 03, 2008
David L. Bender, Thousand Oaks, CA (US);
Gary Janik, Palo Alto, CA (US);
Roy P. Crawford, Saratoga, CA (US);
David E. A. Smith, San Mateo, CA (US);
David L. Bender, Thousand Oaks, CA (US);
Gary Janik, Palo Alto, CA (US);
Roy P. Crawford, Saratoga, CA (US);
David E. A. Smith, San Mateo, CA (US);
Solaicx, Inc., Santa Clara, CA (US);
Abstract
A weighing system is provided for a continuous Czochralski process that accurately measures the weight of the crucible and melt during crystal growth to control the introduction of feedstock in order to keep the weight approximately constant. The system can measure the weight of the crucible while the crucible is rotating, and is insensitive to vibrations of the melt surface as well as variable torques on the crucible shaft induced by the rotation. The system also measures the weight of the crucible and its contents in order to control the amount of feedstock recharged after an ingot is withdrawn.