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:
Jul. 08, 2014
Filed:
Nov. 17, 2010
Daisuke Ebi, Tokyo, JP;
Mitsuo Yoshihara, Tokyo, JP;
Daisuke Ebi, Tokyo, JP;
Mitsuo Yoshihara, Tokyo, JP;
Sumco Corporation, Tokyo, JP;
Abstract
Provided is a silicon electromagnetic casting apparatus that is capable of stably producing polycrystalline silicon used as a solar cell substrate material, having a bottomless cold mold and an induction heating coil, the apparatus for pulling down the silicon melted through electromagnetic induction heating by means of the induction coil and solidifying the silicon melt; further including a plasma torch for generating a transferable plasma arc and a top heater configured so as to face a top surface of the molten silicon, the top heater for generating heat through electromagnetic induction by means of the induction coil. The apparatus enables, upon production of a high quality polycrystalline silicon ingot as a solar cell substrate material along with plasma heating, stable production thereof without cracking in a final solidification portion.